speech difficulties meaning

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What to Know About Speech Impairment

A speech impairment affects people who have problems speaking in a regular tone of voice or tempo. Speech impairments make it hard for people to communicate properly, and they can happen in both children and adults. ‌

These disorders can cause frustration and embarrassment to the person suffering from them.

What is Speech Impairment?

People who have speech impairments have a hard time pronouncing different speech sounds. They might distort the sounds of some words and leave other sounds out completely.

There are three general categories of speech impairment:

• Fluency disorder. This type can be described as continuity, smoothness, rate, and effort in speech production.
• Voice disorder. A voice disorder means you have an atypical tone of voice. It could be an unusual pitch, quality, resonance, or volume.
• Articulation disorder. If you have an articulation disorder, you might distort certain sounds. You could also fully omit sounds.

Stuttering , or stammering, is a common fluency disorder that affects about 3 million Americans. It usually affects young children who are just learning to speak, but it can continue on into adulthood.

Speech and language impairments are two words that are often used interchangeably, but they are two very different types of problems.

Speech means talking. It uses the jaw muscles, tongue, lips, and vocal chords. Language is a set of words and symbols made to communicate a message. Language and speech disorders can affect you separately, or both can happen at the same time.

Types of Speech Impairments

Speech impairments can begin in childhood and carry on through your adult years. Others can happen due to trauma, or after a medical event like a stroke.

The types of speech impairments are:

• Childhood apraxia of speech. This can happen to children when it’s time for them to start talking. The brain’s signals don’t communicate with the mouth, so the child can’t move their lips and tongue in the way they’re mean to.
• Dysarthria. This type of speech impairment happens when the muscles you use to talk are too weak, and can’t form words properly.
• Orofacial myofunctional disorders (OMD). OMDs are characterized by an abnormal pattern of facial muscle use. OMD interferes with how the facial muscles, including the tongue, are used. People who suffer from OMD might also struggle to breathe through their nose.
• Speech sound disorders. It’s normal for children to struggle to pronounce certain sounds as they learn to talk. But after ages four or five, constant mispronunciation might signal a problem. It can continue into adulthood, or some people get it after a stroke.
• Stuttering. Stuttering can mean repeating words or sounds like “uh” and “um” (disfluencies) involuntarily. Stuttering can be intensified by strong emotions or stress.
• Voice. A voice disorder can mean you “lost” your voice because you stressed it too much. It can also mean a chronic cough or paralysis of the vocal cords, among others.

Health Issues That Affect Speech Impairment

Other than childhood speech impairments, there are a range of reasons you could get one in your adult years. They can happen due to a traumatic event, illness, or surgery.

Dysarthria , aphasia, and voice disturbances can happen in adulthood, and are usually due to these medical events.

Aphasia. Aphasia is the loss of ability to understand words, spoken or written. There are many types of aphasia . It can happen after a stroke or if a tumor reaches the part of the brain where language is processed.

Medical issues that can cause aphasia:

• Head trauma
• Transient ischemic attack (TIA)
• Brain tumor
• Alzheimer’s disease

Dysarthria. Dysarthria is usually caused by a nerve problem. The person suffering from it loses the ability to make certain sounds or might have poor pronunciation. It can also affect your ability to control the tongue, larynx, lips, and vocal chords.

Medical issues that can cause dysarthria:

• Facial trauma
• Diseases that affect your nervous system
• Side effects of certain medication
• Alcoholic intoxication
• Dentures that don’t fit properly
• Transient ischemic attack (TIA) ‌

Voice disturbances. Traumatic events or extreme stress placed on the vocal cords can cause you to “lose” your voice or have a vocal disturbance. Disease can also affect the way your voice sounds.

Cancerous or noncancerous growths or nodules on the vocal cords can make your voice sound different.

Understanding Speech Impairments

Having a speech impairment can be a very frustrating and embarrassing experience for the person experiencing it. It’s important to be patient and understanding when communicating.

Try the following tips to improve communication and foster an accepting environment with someone who has a speech impairment:

• Speak slowly and use hand gestures
• Keep a pen and paper handy in case it’s needed to communicate
• Maintain a calm environment free of stimulating sounds
• Use simple phrases when you speak
• Use your normal tone of voice

Consulting with a mental health care provider can help with feelings of anger and depression that can accompany speech impairments.

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What Is a Speech Sound Disorder?

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Speech sound disorders are a blanket description for a child’s difficulty in learning, articulating, or using the sounds/sound patterns of their language. These difficulties are usually clear when compared to the communication abilities of children within the same age group.

Speech developmental disorders may indicate challenges with motor speech. Here, a child experiences difficulty moving the muscles necessary for speech production. This child may also face reduced coordination when attempting to speak.

Speech sound disorders are recognized where speech patterns do not correspond with the movements/gestures made when speaking.  

Speech impairments are a common early childhood occurrence—an estimated 2% to 13% of children live with these difficulties. Children with these disorders may struggle with reading and writing. This can interfere with their expected academic performance. Speech sound disorders are often confused with language conditions such as specific language impairment (SLI).

This article will examine the distinguishing features of this disorder. It will also review factors responsible for speech challenges, and the different ways they can manifest. Lastly, we’ll cover different treatment methods that make managing this disorder possible.

Symptoms of Speech Sound Disorder

A speech sound disorder may manifest in different ways. This usually depends on the factors responsible for the challenge, or how extreme it is.

There are different patterns of error that may signal a speech sound disorder. These include:

• Removing a sound from a word
• Including a sound in a word
• Replacing hard to pronounce sounds with an unsuitable alternative
• Difficulty pronouncing the same sound in different words (e.g., "pig" and "kit")
• Repeating sounds or words
• Lengthening words
• Pauses while speaking
• Tension when producing sounds
• Head jerks during speech
• Blinking while speaking
• Shame while speaking
• Changes in voice pitch
• Running out of breath while speaking

It’s important to note that children develop at different rates. This can reflect in the ease and ability to produce sounds. But where children repeatedly make sounds or statements that are difficult to understand, this could indicate a speech disorder.

Diagnosis of Speech Sound Disorders

For a correct diagnosis, a speech-language pathologist can determine whether or not a child has a speech-sound disorder.

This determination may be made in line with the requirements of the DSM-5 diagnostic criteria . These guidelines require that:

• The child experience persistent difficulty with sound production (this affects communication and speech comprehension)
• Symptoms of the disorder appear early during the child’s development stages
• This disorder limits communication. It affects social interactions, academic achievements, and job performance.
• The disorder is not caused by other conditions like a congenital disorder or an acquired condition like hearing loss . Hereditary disorders are, however, exempted. 

Causes of Speech Sound Disorders

There is no known cause of speech sound disorders. However, several risk factors may increase the odds of developing a speech challenge. These include:

• Gender : Male children are more likely to develop a speech sound disorder
• Family history : Children with family members living with speech disorders may acquire a similar challenge.
• Socioeconomics : Being raised in a low socioeconomic environment may contribute to the development of speech and literacy challenges.
• Pre- and post-natal challenges : Difficulties faced during pregnancy such as maternal infections and stressors may worsen the chances of speech disorders in a child. Likewise, delivery complications, premature birth, and low-birth-weight could lead to speech disorders.
• Disabilities : Down syndrome, autism , and other disabilities may be linked to speech-sound disorders.
• Physical challenges : Children with a cleft lip may experience speech sound difficulties.
• Brain damage : These disorders may also be caused by an infection or trauma to a child’s brain . This is seen in conditions like cerebral palsy where the muscles affecting speech are injured.

Types of Speech Sound Disorders

By the time a child turns three, at least half of what they say should be properly understood. By ages four and five, most sounds should be pronounced correctly—although, exceptions may arise when pronouncing “l”, “s”,”r”,”v”, and other similar sounds. By seven or eight, harder sounds should be properly pronounced. 

A child with a speech sound disorder will continue to struggle to pronounce words, even past the expected age. Difficulty with speech patterns may signal one of the following speech sound disorders:

This refers to interruptions while speaking. Stuttering is the most common form of disfluency. It is recognized for recurring breaks in the free flow of speech. After the age of four, a child with disfluency will still repeat words or phrases while speaking. This child may include extra words or sounds when communicating—they may also make words longer by stressing syllables.

This disorder may cause tension while speaking. Other times, head jerking or blinking may be observed with disfluency. 

Children with this disorder often feel frustrated when speaking, it may also cause embarrassment during interactions. 

Articulation Disorder

When a child is unable to properly produce sounds, this may be caused by inexact placement, speed, pressure, or movement from the lips, tongue, or throat.  

This usually signals an articulation disorder, where sounds like “r”, “l”, or “s” may be changed. In these cases, a child’s communication may be understood by only close family members.

Phonological Disorder

A phonological disorder is present where a child is unable to make the speech sounds expected of their age. Here, mistakes may be made when producing sounds. Other times, sounds like consonants may be omitted when speaking.  

Voice Disorder

Where a child is observed to have a raspy voice, this may be an early sign of a voice disorder. Other indicators include voice breaks, a change in pitch, or an excessively loud or soft voice.  

Children that run out of breath while speaking may also live with this disorder. Likewise, children may sound very nasally, or can appear to have inadequate air coming out of their nose if they have a voice disorder.

Childhood apraxia of speech occurs when a child lacks the proper motor skills for sound production. Children with this condition will find it difficult to plan and produce movements in the tongue, lips, jaw, and palate required for speech.  

Treatment of Speech Sound Disorder

Parents of children with speech sound disorders may feel at a loss for the next steps to take. To avoid further strain to the child, it’s important to avoid showing excessive concern.

Instead, listening patiently to their needs, letting them speak without completing their sentences, and showing usual love and care can go a long way.

For professional assistance, a speech-language pathologist can assist with improving a child’s communication. These pathologists will typically use oral motor exercises to enhance speech.

These oral exercises may also include nonspeech oral exercises such as blowing, oral massages and brushing, cheek puffing, whistleblowing, etc.

Nonspeech oral exercises help to strengthen weak mouth muscles, and can help with learning the common ways of communicating.

Parents and children with speech sound disorders may also join support groups for information and assistance with the condition.

A Word From Verywell

It can be frustrating to witness the challenges in communication. But while it's understandable to long for typical communication from a child—the differences caused by speech disorders can be managed with the right care and supervision. Speaking to a speech therapist, and showing love o children with speech disorders can be important first steps in overcoming these conditions.

Eadie P, Morgan A, Ukoumunne OC, Ttofari Eecen K, Wake M, Reilly S. Speech sound disorder at 4 years: prevalence, comorbidities, and predictors in a community cohort of children . Dev Med Child Neurol . 2015;57(6):578-584. doi:10.1111/dmcn.12635

McLeod S, Harrison LJ, McAllister L, McCormack J. Speech sound disorders in a community study of preschool children . Am J Speech Lang Pathol . 2013;22(3):503-522. doi:10.1044/1058-0360(2012/11-0123)

Murphy CF, Pagan-Neves LO, Wertzner HF, Schochat E. Children with speech sound disorder: comparing a non-linguistic auditory approach with a phonological intervention approach to improve phonological skills . Front Psychol . 2015;6:64. Published 2015 Feb 4. doi:10.3389/fpsyg.2015.00064

Penn Medicine. Speech and Language Disorders-Symptoms and Causes .

PsychDB. Speech Sound Disorder (Phonological Disorder) .

Sices L, Taylor HG, Freebairn L, Hansen A, Lewis B. Relationship between speech-sound disorders and early literacy skills in preschool-age children: impact of comorbid language impairment . J Dev Behav Pediatr . 2007;28(6):438-447. doi:10.1097/DBP.0b013e31811ff8ca

American Speech-Language-Hearing Association. Speech Sound Disorders: Articulation and Phonology .

American Speech-Language-Hearing Association. Speech Sound Disorders .

MedlinePlus. Phonological Disorder .

National Institute on Deafness and Other Communication Disorders. Articulation Disorder .

National Institute of Health. Phonological Disorder.

Lee AS, Gibbon FE. Non-speech oral motor treatment for children with developmental speech sound disorders . Cochrane Database Syst Rev . 2015;2015(3):CD009383. Published 2015 Mar 25. doi:10.1002/14651858.CD009383.pub2

By Elizabeth Plumptre Elizabeth is a freelance health and wellness writer. She helps brands craft factual, yet relatable content that resonates with diverse audiences.

• Second Opinion

Speech Sound Disorders in Children

What are speech sound disorders in children?

It’s normal for young children learning language skills to have some trouble saying words the right way. That’s part of the learning process. Their speech skills develop over time. They master certain sounds and words at each age. By age 8, most children have learned how to master all word sounds.

But some children have speech sound disorders. This means they have trouble saying certain sounds and words past the expected age. This can make it hard to understand what a child is trying to say.  

Speech sound problems include articulation disorder and phonological process disorder.

Articulation disorder is a problem with making certain sounds, such as “sh.”

Phonological process disorder is a pattern of sound mistakes. This includes not pronouncing certain letters.

What causes speech sound disorders in a child?

Often, a speech sound disorder has no known cause. But some speech sound errors may be caused by:

Injury to the brain

Thinking or development disability

Problems with hearing or hearing loss, such as past ear infections

Physical problems that affect speech, such cleft palate or cleft lip

Disorders affecting the nerves involved in speech

Which children are at risk for speech sound disorders?

The cause often is not known, but children at risk for a speech sound disorder include those with:

Developmental disorders such as autism

Genetic disorders such as Down syndrome

Hearing loss

Nervous system disorders such as cerebral palsy

Illnesses such as frequent ear infections

Physical problems such as a cleft lip or palate

Too much thumb-sucking or pacifier use

Low education level of the parent

Lack of support for learning in the home

What are the symptoms of speech sound disorders in a child?

Your child’s symptoms depend on what type of speech sound disorder your child has. He or she may have trouble forming some word sounds correctly past a certain age. This is called articulation disorder. Your child may drop, add, distort, or swap word sounds. Keep in mind that some sound changes may be part of an accent. They are not speech errors. Signs of this problem can include:

Leaving off sounds from words (example: saying “coo” instead of “school”)

Adding sounds to words (example: saying “puhlay” instead of “play”)

Distorting sounds in words (example: saying “thith” instead of “this”)

Swapping sounds in words (example: saying “wadio” instead of “radio”)

If your child often makes certain word speech mistakes, he or she may have phonological process disorder. The mistakes may be common in young children learning speech skills. But when they last past a certain age, it may be a disorder. Signs of this problem are:

Saying only 1 syllable in a word (example: “bay” instead of “baby”)

Simplifying a word by repeating 2 syllables (example: “baba” instead of “bottle”)

Leaving out a consonant sound (example: “at” or “ba” instead of “bat”)

Changing certain consonant sounds (example: “tat” instead of “cat”)

How are speech sound disorders diagnosed in a child?

First, your child’s healthcare provider will check his or her hearing. This is to make sure that your child isn’t simply hearing words and sounds incorrectly.

If your child’s healthcare provider rules out hearing loss, you may want to talk with a speech-language pathologist. This is a speech expert who evaluates and treats children who are having problems with speech-language and communication.                       

By watching and listening to your child speak, a speech-language pathologist can determine whether your child has a speech sound disorder. The pathologist will evaluate your child’s speech and language skills. He or she will keep in mind accents and dialect. He or she can also find out if a physical problem in the mouth is affecting your child’s ability to speak. Finding the problem and getting help early are important to treat speech sound disorders.

How are speech sound disorders treated in a child?

The speech-language pathologist can put together a therapy plan to help your child with his or her disorder. These healthcare providers work with children to help them:

Notice and fix sounds that they are making wrong

Learn how to correctly form their problem sound

Practice saying certain words and making certain sounds

The pathologist can also give you activities and strategies to help your child practice at home. If your child has a physical problem in the mouth, the pathologist can refer your child to an ear, nose, throat healthcare provider or orthodontist if needed.

Spotting a speech sound disorder early can help your child overcome any speech problems. He or she can learn how to speak well and comfortably.

How can I help my child live with a speech sound disorder?

You can do things to take care of your child with a speech sound disorder:

Keep all appointments with your child’s healthcare provider.

Talk with your healthcare provider about other providers who will be involved in your child’s care. Your child may get care from a team that may include experts such as speech-language pathologists and counselors. Your child’s care team will depend on your child’s needs and the severity of the speech sound disorder.

Tell others of your child’s disorder. Work with your child’s healthcare provider and schools to develop a treatment plan.

Reach out for support from local community services. Being in touch with other parents who have a child with a speech sound disorder may be helpful.

When should I call my child’s healthcare provider?

Call your child’s healthcare provider if your child has:

Symptoms that don’t get better, or get worse

New symptoms

Key points about speech sound disorders in children

A speech sound disorder means a child has trouble saying certain sounds and words past the expected age.

A child with an articulation disorder has problems making certain sounds the right way.

A child with phonological process disorder regularly makes certain word speech mistakes.

The cause of this problem is often unknown.

A speech-language pathologist can help diagnose and treat a speech sound disorder.

Tips to help you get the most from a visit to your child’s healthcare provider:

Know the reason for the visit and what you want to happen.

Before your visit, write down questions you want answered.

At the visit, write down the name of a new diagnosis, and any new medicines, treatments, or tests. Also write down any new instructions your provider gives you for your child.

Know why a new medicine or treatment is prescribed and how it will help your child. Also know what the side effects are.

Ask if your child’s condition can be treated in other ways.

Know why a test or procedure is recommended and what the results could mean.

Know what to expect if your child does not take the medicine or have the test or procedure.

If your child has a follow-up appointment, write down the date, time, and purpose for that visit.

Know how you can contact your child’s provider after office hours. This is important if your child becomes ill and you have questions or need advice.

Fluency Disorder

• Age-Appropriate Speech and Language Milestones
• Communication Disorders in Children

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• Childhood apraxia of speech

Childhood apraxia of speech (CAS) is a rare speech disorder. Children with this disorder have trouble controlling their lips, jaws and tongues when speaking.

In CAS , the brain has trouble planning for speech movement. The brain isn't able to properly direct the movements needed for speech. The speech muscles aren't weak, but the muscles don't form words the right way.

To speak correctly, the brain has to make plans that tell the speech muscles how to move the lips, jaw and tongue. The movements usually result in accurate sounds and words spoken at the proper speed and rhythm. CAS affects this process.

CAS is often treated with speech therapy. During speech therapy, a speech-language pathologist teaches the child to practice the correct way to say words, syllables and phrases.

Children with childhood apraxia of speech (CAS) may have a variety of speech symptoms. Symptoms vary depending on a child's age and the severity of the speech problems.

CAS can result in:

• Babbling less or making fewer vocal sounds than is typical between the ages of 7 to 12 months.
• Speaking first words late, typically after ages 12 to 18 months old.
• Using a limited number of consonants and vowels.
• Often leaving out sounds when speaking.
• Using speech that is hard to understand.

These symptoms are usually noticed between ages 18 months and 2 years. Symptoms at this age may indicate suspected CAS . Suspected CAS means a child may potentially have this speech disorder. The child's speech development should be watched to determine if therapy should begin.

Children usually produce more speech between ages 2 and 4. Signs that may indicate CAS include:

• Vowel and consonant distortions.
• Pauses between syllables or words.
• Voicing errors, such as "pie" sounding like "bye."

Many children with CAS have trouble getting their jaws, lips and tongues to the correct positions to make a sound. They also may have a hard time moving smoothly to the next sound.

Many children with CAS also have language problems, such as reduced vocabulary or trouble with word order.

Some symptoms may be unique to children with CAS , which helps to make a diagnosis. However, some symptoms of CAS are also symptoms of other types of speech or language disorders. It's hard to diagnose CAS if a child has only symptoms that are found both in CAS and in other disorders.

Some characteristics, sometimes called markers, help distinguish CAS from other types of speech disorders. Those associated with CAS include:

• Trouble moving smoothly from one sound, syllable or word to another.
• Groping movements with the jaw, lips or tongue to try to make the correct movement for speech sounds.
• Vowel distortions, such as trying to use the correct vowel but saying it incorrectly.
• Using the wrong stress in a word, such as pronouncing "banana" as "BUH-nan-uh" instead of "buh-NAN-uh."
• Using equal emphasis on all syllables, such as saying "BUH-NAN-UH."
• Separation of syllables, such as putting a pause or gap between syllables.
• Inconsistency, such as making different errors when trying to say the same word a second time.
• Having a hard time imitating simple words.
• Voicing errors, such as saying "down" instead of "town."

Other speech disorders sometimes confused with CAS

Some speech sound disorders often get confused with CAS because some of the symptoms may overlap. These speech sound disorders include articulation disorders, phonological disorders and dysarthria.

A child with an articulation or phonological disorder has trouble learning how to make and use specific sounds. Unlike in CAS , the child doesn't have trouble planning or coordinating the movements to speak. Articulation and phonological disorders are more common than CAS .

Articulation or phonological speech errors may include:

• Substituting sounds. The child might say "fum" instead of "thumb," "wabbit" instead of "rabbit" or "tup" instead of "cup."
• Leaving out final consonants. A child with CAS might say "duh" instead of "duck" or "uh" instead of "up."
• Stopping the airstream. The child might say "tun" instead of "sun" or "doo" instead of "zoo."
• Simplifying sound combinations. The child might say "ting" instead of "string" or "fog" instead of "frog."

Dysarthria is a speech disorder that occurs because the speech muscles are weak. Making speech sounds is hard because the speech muscles can't move as far, as quickly or as strongly as they do during typical speech. People with dysarthria may also have a hoarse, soft or even strained voice. Or they may have slurred or slow speech.

Dysarthria is often easier to identify than CAS . However, when dysarthria is caused by damage to areas of the brain that affect coordination, it can be hard to determine the differences between CAS and dysarthria.

Childhood apraxia of speech (CAS) has a number of possible causes. But often a cause can't be determined. There usually isn't an observable problem in the brain of a child with CAS .

However, CAS can be the result of brain conditions or injury. These may include a stroke, infections or traumatic brain injury.

CAS also may occur as a symptom of a genetic disorder, syndrome or metabolic condition.

CAS is sometimes referred to as developmental apraxia. But children with CAS don't make typical developmental sound errors and they don't grow out of CAS . This is unlike children with delayed speech or developmental disorders who typically follow patterns in speech and sounds development but at a slower pace than usual.

Risk factors

Changes in the FOXP2 gene appear to increase the risk of childhood apraxia of speech (CAS) and other speech and language disorders. The FOXP2 gene may be involved in how certain nerves and pathways in the brain develop. Researchers continue to study how changes in the FOXP2 gene may affect motor coordination and speech and language processing in the brain. Other genes also may impact motor speech development.

Complications

Many children with childhood apraxia of speech (CAS) have other problems that affect their ability to communicate. These problems aren't due to CAS , but they may be seen along with CAS .

Symptoms or problems that are often present along with CAS include:

• Delayed language. This may include trouble understanding speech, reduced vocabulary, or not using correct grammar when putting words together in a phrase or sentence.
• Delays in intellectual and motor development and problems with reading, spelling and writing.
• Trouble with gross and fine motor movement skills or coordination.
• Trouble using communication in social interactions.

Diagnosing and treating childhood apraxia of speech at an early stage may reduce the risk of long-term persistence of the problem. If your child experiences speech problems, have a speech-language pathologist evaluate your child as soon as you notice any speech problems.

Childhood apraxia of speech care at Mayo Clinic

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• Carter J, et al. Etiology of speech and language disorders in children. https://www.uptodate.com/contents/search. Accessed April 6, 2023.
• Childhood apraxia of speech. American Speech-Language-Hearing Association. https://www.asha.org/public/speech/disorders/childhood-apraxia-of-speech/. Accessed April 6, 2023.
• Apraxia of speech. National Institute on Deafness and Other Communication Disorders. http://www.nidcd.nih.gov/health/voice/pages/apraxia.aspx. Accessed April 6, 2023.
• Ng WL, et al. Predicting treatment of outcomes in rapid syllable transition treatment: An individual participant data meta-analysis. Journal of Speech, Language and Hearing Research. 2022; doi:10.1044/2022_JSLHR-21-00617.
• Speech sound disorders. American Speech-Language-Hearing Association. http://www.asha.org/public/speech/disorders/SpeechSoundDisorders/. Accessed April 6, 2023.
• Iuzzini-Seigel J. Prologue to the forum: Care of the whole child — Key considerations when working with children with childhood apraxia of speech. Language, Speech and Hearing Services in Schools. 2022; doi:10.1044/2022_LSHSS-22-00119.
• Namasivayam AK, et al. Speech sound disorders in children: An articulatory phonology perspective. 2020; doi:10.3389/fpsyg.2019.02998.
• Strand EA. Dynamic temporal and tactile cueing: A treatment strategy for childhood apraxia of speech. American Journal of Speech-Language Pathology. 2020; doi:10.1044/2019_AJSLP-19-0005.
• Ami TR. Allscripts EPSi. Mayo Clinic. March 13, 2023.
• Kliegman RM, et al. Language development and communication disorders. In: Nelson Textbook of Pediatrics. 21st ed. Elsevier; 2020. https://www.clinicalkey.com. Accessed April 6, 2023.
• Adam MP, et al., eds. FOXP2-related speech and language disorder. In: GeneReviews. University of Washington, Seattle; 1993-2023. https://www.ncbi.nlm.nih.gov/books/NBK1116. Accessed April 6, 2023.
• How is CAS diagnosed? Childhood Apraxia of Speech Association of North America. https://www.apraxia-kids.org/apraxia_kids_library/how-is-cas-diagnosed/. Accessed April 13, 2023.
• Chenausky KV, et al. The importance of deep speech phenotyping for neurodevelopmental and genetic disorders: A conceptual review. Journal of Neurodevelopmental Disorders. 2022; doi:10.1186/s11689-022-09443-z.
• Strand EA. Dynamic temporal and tactile cueing: A treatment strategy for childhood apraxia of speech. American Journal of Speech Language Pathology. 2020; doi:10.1044/2019_AJSLP-19-0005.
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What Is Apraxia of Speech?

A Challenging Language Disorder

Apraxia of speech is a language impairment that occurs due to brain damage. The underlying causes of apraxia of speech are usually different for children than for adults. Speech apraxia is difficult to cope with, and speech therapy can help improve communication.

Diagnosis of the underlying cause is crucial, both to help direct treatment for speech difficulties and to treat and prevent further neurological problems.

Illustration by Zoe Hansen for Verywell Health

Apraxia of Speech Symptoms 

Speech apraxia leads to significant difficulties in communicating. This condition usually causes persistent symptoms and typically doesn't change.

People with apraxia of speech are cognitively and physically able to produce words and sentences. Language comprehension should not be affected by apraxia of speech, and words are not slurred in apraxia of speech.

Features of apraxia of speech include the following:

• Distortion of sounds : The sounds of words and phrases are often wrong in speech apraxia. For example, the vowels or consonants might be drawn out for too long.
• Inconsistency in pronouncing words and sounds : The mispronunciation of words with speech apraxia is not necessarily consistent. For example, you could have difficulty with the first part of a word, and the next time you say that word, you might have difficulty with the middle or the end.
• Struggling for words : If you have apraxia of speech, you will work hard to say the words you want to say.
• Errors in speech : You might use the wrong words and phrases if you have apraxia of speech, despite knowing what you mean to say.

Other cognitive or physical problems can often occur with speech apraxia, depending on the underlying cause.

Apraxia vs. Other Speech and Language Disorders

Apraxia of speech is a type of language disorder. Aphasia is the most common language impairment, and dysarthria is a speech impairment caused by difficulty with motor speech function. Apraxia is distinct from these disorders, although they may share some similarities. Common speech disorders include:

• Receptive aphasia : Usually referred to as Wernicke’s aphasia, this type of language impairment is characterized by fluid speech that usually doesn’t make sense, often with word substitutions. Language comprehension is typically impaired with Wernicke’s aphasia.
• Impaired fluency : Often described as Broca’s aphasia , this is a language problem that causes people to have choppy speech without a normal rhythm. Usually, speech comprehension is not substantially affected by Broca’s aphasia.
• Conduction aphasia : In conduction aphasia, the problem is the ability to repeat a short sentence. Expression and comprehension of speech are spared.
• Dysarthria : This condition is characterized by slurred speech or difficulty making certain sounds. Usually, people with dysarthria without aphasia can understand language and may know which words they want to say but have difficulty pronouncing them.

Speech apraxia is caused by damage to regions in the brain that mediate communication between language regions in the brain and between the left and right hemispheres of the brain.

This can occur with developmental conditions, such as autism, or it may result from harm to the brain, such as from head trauma.

Conditions associated with apraxia of speech include:

• Autism spectrum disorder
• Cerebral palsy
• Head trauma
• Brain tumors
• Brain surgery

These conditions are not always associated with apraxia of speech. But they can sometimes cause damage or dysfunction to regions of the brain that allow communication between the right and left hemispheres—and then they could be associated with speech apraxia.

Speech apraxia is diagnosed based on a clinical evaluation, usually by a physician or a speech therapist . A detailed examination of speech and cognitive abilities is necessary to define apraxia of speech and to rule out other disorders that can cause similar speech and language patterns, such as dysarthria and aphasia.

Speech patterns noted in apraxia of speech include the following:

• Phonemic error frequency : This involves assessment of the frequency of mistakes while pronouncing words.
• Distortion error frequency : This is a count of how often sounds are altered during speech.
• Word syllable duration : This involves assessment of the extra time in saying a word, usually due to struggling.

The Apraxia of Speech Rating Scale (ASRS) is one of the ways that speech apraxia can be defined. Healthcare providers can use this scale to communicate with each other and follow the improvement of apraxia of speech with therapy. The ASRS includes 16 components, such as repetition of sounds or inaccurate sounds, that are rated on a scale from zero to four.

If you’ve been diagnosed with speech apraxia or any communication problem, healthcare providers will work to determine the underlying cause. Issues such as childhood neurodevelopmental problems, stroke, brain tumors, or damage from a head injury need to be identified and treated.

Diagnostic testing may include:

• Brain imaging tests : These tests can help identify common causes of apraxia of speech, such as a stroke or head trauma.
• Cognitive testing : These tests may be used as part of the assessment for autism, dementia, or psychiatric conditions, which may be related to speech challenges.
• Blood tests : Medical problems such as infections, electrolyte disturbances , or organ failure may cause communication difficulties.

In addition to diagnosing speech apraxia, your healthcare providers will also work to determine whether you have other neurological deficits that could be caused by the underlying issue causing your speech apraxia. These can include learning difficulties, behavioral problems, or body weakness.

Apraxia of speech is treated with speech therapy . This type of therapy will follow patterns of treatment that are well-established for improving speech and will also provide an individualized treatment plan.

Therapy may need to be ongoing, and the frequency and specific exercises used during your therapy can be adjusted as you improve. For example, if your speech improves substantially, you might be able to work with your speech therapist less frequently, or you may be able to do some speech exercises at home, as directed by your therapist.

It’s not possible to predict with absolute certainty whether a person will recover from apraxia of speech and how much they might improve. However, there are some diagnostic clues that can help in anticipating the extent of recovery. 

If you or a loved one has apraxia of speech, it can help to know that the ability to participate in speech therapy can lead to better outcomes. If your cognitive function is not affected or is only mildly impaired, this can help you take an active role in your therapy.

Research About Prognosis and Treatment

Stronger connectivity between certain areas of the right and left hemispheres of the brain is associated with better recovery.

For example, one research study showed that early connectivity of the inferior frontal gyrus (an area that processes speech and language) within two weeks after a stroke may be a strong predictor of recovery of apraxia of speech.  

And at six months, lower severity of speech apraxia was associated with stronger connectivity of the anterior insula (which supports subjective feelings) on the right and left hemispheres and the ventral premotor cortex (which is involved in grasping and manipulating objects) of the right and left hemispheres.

This type of connectivity can be identified with metabolic brain testing, which is time-consuming and often impractical. However, this research can help scientists learn about ways to improve treatment for people with apraxia of speech.

Living with a language impairment can be difficult. Communication challenges interfere with relationships and day-to-day life. This can require extra effort from family, friends, and everybody else who interacts with a person who has apraxia of speech.

Patience is essential to managing this communication difficulty. It is important to work with your speech therapist in order to identify ways to communicate as you work to recover. This can include using pictures, gestures, and other ways of expressing your needs.

Apraxia of speech is a type of language impairment that is caused by damage to the brain, either during fetal development, childhood, or adulthood. This condition can occur along with other neurological deficits that are associated with damage to the brain.

There are many different causes, and a diagnosis of the cause is essential for a comprehensive treatment of speech apraxia, as well as any associated physical and cognitive deficits. Speech therapy is the treatment for the speech impairment seen in this condition.

National Institute on Deafness and Other Communication Disorders. Apraxia of speech .

Vogindroukas I, Stankova M, Chelas EN, Proedrou A. Language and speech characteristics in autism . Neuropsychiatr Dis Treat . 2022;18:2367-2377. doi:10.2147/NDT.S331987

Haley KL, Jacks A. Three-dimensional speech profiles in stroke aphasia and apraxia of speech . Am J Speech Lang Pathol. 2023:1-10. doi:10.1044/2022_AJSLP-22-00170

Hybbinette H, Östberg P, Schalling E, et al. Longitudinal changes in functional connectivity in speech motor networks in apraxia of speech after stroke . Front Neurol. 2022;13:1013652. doi:10.3389/fneur.2022.1013652

Duffy JR, Martin PR, Clark HM, et al. The apraxia of speech rating scale: reliability, validity, and utility . Am J Speech Lang Pathol. 2023;32(2):469-491. doi:10.1044/2022_AJSLP-22-00148

Zhao J, Li Y, Zhang X, et al. Alteration of network connectivity in stroke patients with apraxia of speech after tDCS: a randomized controlled study . Front Neurol. 2022;13:969786. doi:10.3389/fneur.2022.969786

By Heidi Moawad, MD Dr. Moawad is a neurologist and expert in brain health. She regularly writes and edits health content for medical books and publications.

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Speech disorders - children

A speech disorder is a condition in which a person has problems creating or forming the speech sounds needed to communicate with others. This can make the person's speech difficult to understand.

Common speech disorders are:

• Articulation disorders
• Phonological disorders
• Voice disorders or resonance disorders

Speech disorders are different from language disorders in children . Language disorders refer to someone having difficulty with:

• Getting their meaning or message across to others (expressive language)
• Understanding the message coming from others (receptive language)

Speech is one of the main ways in which we communicate with those around us. It develops naturally, along with other signs of normal growth and development . Disorders of speech and language are common in preschool age children.

Disfluencies are disorders in which a person repeats a sound, word, or phrase. Stuttering may be the most serious disfluency. It may be caused by:

• Genetic abnormalities
• Emotional stress
• Any trauma to the brain or infection

Articulation and phonological disorders may occur in other family members. Other causes include:

• Problems or changes in the structure or shape of the muscles and bones used to make speech sounds. These changes may include cleft palate and tooth problems.
• Damage to parts of the brain or the nerves (such as from cerebral palsy ) that control how the muscles work together to create speech.
• Hearing loss.

Voice disorders are caused by problems when air passes from the lungs, through the vocal cords, and then through the throat, nose, mouth, and lips. A voice disorder may be due to:

• Acid from the stomach moving upward ( GERD )
• Cancer of the throat
• Cleft palate or other problems with the palate
• Conditions that damage the nerves that supply the muscles of the vocal cords
• Laryngeal webs or clefts (a birth defect in which a thin layer of tissue is between the vocal cords)
• Noncancerous growths (polyps, nodules, cysts, granulomas, papillomas, or ulcers) on the vocal cords
• Overuse of the vocal cords from screaming, constantly clearing the throat, or singing
• Hearing loss

Stuttering is the most common type of disfluency.

Symptoms of disfluency can include:

• Repetition of sounds, words, or parts of words or phrases after age 4 (I want...I want my doll. I...I see you.)
• Putting in (interjecting) extra sounds or words (We went to the...uh...store.)
• Making words longer (I am Boooobbby Jones.)
• Pausing during a sentence or words, often with the lips together
• Tension in the voice or sounds
• Frustration with attempts to communicate
• Head jerking while talking
• Eye blinking while talking
• Embarrassment with speech

ARTICULATION DISORDER

The child is not able to produce speech sounds clearly, such as saying "coo" instead of "school."

• Certain sounds (like "r", "l", or "s") may be consistently distorted or changed (such as making the 's' sound with a whistle).
• Errors may make it hard for people to understand the person (only family members may be able to understand a child).

PHONOLOGICAL DISORDER

The child does not use some or all of the speech sounds to form words as expected for their age.

• The last or first sound of words (most often consonants) may be left out or changed.
• The child may have no problem pronouncing the same sound in other words (a child may say "boo" for "book" and "pi" for "pig", but may have no problem saying "key" or "go").

VOICE DISORDERS

Other speech problems include:

• Hoarseness or raspiness to the voice
• Voice may break in or out
• Pitch of the voice may change suddenly
• Voice may be too loud or too soft
• Person may run out of air during a sentence
• Speech may sound odd because too much air is escaping through the nose (hypernasality) or too little air is coming out through the nose (hyponasality)

Exams and Tests

Your health care provider will ask about your child's developmental and family history. The provider will do some neurological screening and check for:

• Fluency of speech
• Any emotional stress
• Any underlying condition
• Effect of speech disorder on daily life

Some other evaluation tools used to identify and diagnose speech disorders are:

• Denver Articulation Screening Examination.
• Leiter International Performance scale-3.
• Goldman-Fristoe Test of Articulation 3 (GFTA-3).
• Arizona Articulation and Phonology Scale 4th Revision (Arizona-4).
• Prosody-voice screening profile.

A hearing test may also be done to check for hearing loss as a cause of the speech disorder.

Children may outgrow milder forms of speech disorders. The type of treatment will depend on the severity of the speech disorder and its cause.

Speech therapy may help with more severe symptoms or any speech problems that do not improve.

In therapy, the therapist may teach your child how to use their tongue to create certain sounds.

If a child has a speech disorder, parents are encouraged to:

• Avoid expressing too much concern about the problem, which can make matters worse by making the child more self-conscious.
• Avoid stressful social situations whenever possible.
• Listen patiently to the child, make eye contact, don't interrupt, and show love and acceptance. Avoid finishing sentences for them.
• Set aside time for talking.

Support Groups

More information and support for people with stuttering and their families can be found at:

• American Institute for Stuttering -- stutteringtreatment.org
• American Speech-Language-Hearing Association (ASHA) -- www.asha.org/
• The Stuttering Foundation -- www.stutteringhelp.org
• National Stuttering Association (NSA) -- westutter.org

Outlook (Prognosis)

The outlook depends on the cause of the disorder. Speech can often be improved with speech therapy. Early treatment is likely to have better results.

Possible Complications

Speech disorders may lead to challenges with social interactions due to difficulty communicating.

When to Contact a Medical Professional

Contact your provider if:

• Your child's speech is not developing according to normal milestones.
• You think your child is in a high-risk group.
• Your child is showing signs of a speech disorder.

Hearing loss is a risk factor for speech disorders. At-risk infants should be referred to an audiologist for a hearing test. Hearing and speech therapy can then be started, if necessary.

As young children begin to speak, some disfluency is common, and most of the time, it goes away without treatment. If you place too much attention on the disfluency, a stuttering pattern may develop.

Alternative Names

Articulation deficiency; Articulation disorder; Phonological disorder; Voice disorders; Vocal disorders; Disfluency; Communication disorder - speech disorder; Speech disorder - stuttering; Cluttering; Stammering; Childhood onset fluency disorder

American Speech-Language-Hearing Association website. Voice disorders. www.asha.org/Practice-Portal/Clinical-Topics/Voice-Disorders/ . Accessed February 22, 2024.

Driver LE, Nelson ME. Pediatric speech disorders. In: Flint PW, Francis HW, Haughey BH, et al, eds. Cummings Otolaryngology: Head and Neck Surgery . 7th ed. Philadelphia, PA: Elsevier; 2021:chap 183.

Simms MD. Language development and communication disorders. In: Kliegman RM, St. Geme JW, Blum NJ, Shah SS, Tasker RC, Wilson KM, eds. Nelson Textbook of Pediatrics . 21st ed. Philadelphia, PA: Elsevier; 2020:chap 52.

Trauner DA, Nass RD. Developmental language disorders. In: Swaiman KF, Ashwal S, Ferriero DM, et al, eds. Swaiman's Pediatric Neurology: Principles and Practice . 6th ed. Philadelphia, PA: Elsevier; 2017:chap 53.

Zajac DJ. Evaluation and management of speech disorders for the patient with cleft palate. In: Fonseca RJ, ed. Oral and Maxillofacial Surgery . 3rd ed. St Louis, MO: Elsevier; 2018:chap 32.

Review Date 2/17/2024

Updated by: Charles I. Schwartz, MD, FAAP, Clinical Assistant Professor of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, General Pediatrician at PennCare for Kids, Phoenixville, PA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.

Related MedlinePlus Health Topics

• Speech and Language Problems in Children

Five Common Speech Disorders in Children

You have determined that your child has more than just a speech delay, now what? How do you determine what kind of speech disorder your child has and more importantly, what do you do about it? We have listed below five common speech disorders in children. Of course, we always recommend a visit to your pediatrician if you feel your child has any of these symptoms, and an appointment with an SLP may be necessary to begin an effective speech therapy treatment plan.

5 Common Speech Disorders in Children:

Articulation Disorder: An articulation disorder is a speech sound disorder in which a child has difficulty making certain sounds correctly.  Sounds may be omitted or improperly altered during the course of speech. A child may substitute sounds (“wabbit” instead of “rabbit”) or add sounds improperly to words. Young children will typically display articulation issues as they learn to speak, but they are expected to “grow out of it” by a certain age.  If the errors persist past a standard developmental age, which varies based on the sound, then that child has an articulation disorder.

The most common articulation disorders are in the form of a “lisp” – when a child does not pronounce the S sound correctly – or when a child cannot pronounce the R sound correctly. He may say “wabbit” instead of “rabbit” or “buhd” or instead of “bird.”

Apraxia of Speech is a communication disorder affecting the motor programming system for speech production.  Speech production is difficult – specifically with sequencing and forming sounds. The person may know what he wants to say, but there is a disruption in the part of the brain that sends the signal to the muscle for the movement necessary to produce the sound.  That leads to problems with articulation as well as intonation and speaking stress and rhythm errors. Apraxia of Speech can be discovered in childhood (CAS), or might be acquired (AOS) resulting from a brain injury or illness in both children and adults.

Fragile X Syndrome (FXS) is an inherited genetic disorder that is the most common cause of inherited intellectual disabilities in boys as well as  autism  (about 30% of children with FXS will have autism). It also affects girls, though their symptoms tend to be milder. It is greatly under-recognized and second only to  Down syndrome  in causing intellectual impairment.

FXS occurs when there is a mutation of FMRI gene and is an inherited disorder.  If a child received a pre-mutated X chromosome from one of his parents (as a carrier), then he is at greater risk of developing FXS.  Diagnosing Fragile X Syndrome is not easy for parents and doctors at the beginning of a child’s life.  Few outward signs are noticeable within the first 9 months. These signs may include an elongated face and protruding eyes.

Intellectual disabilities, speech and language problems, and social anxiety occur most frequently in children with Fragile X. Speech symptoms include repetition of words and phrases, cluttered speech and difficulties with the pragmatics of speech. All of FXS’s symptoms can range from mild to very severe.

Stuttering occurs when speech is disrupted by involuntary repetitions, prolonging of sounds and hesitation or pausing before speech. Stuttering can be developmental, meaning it begins during early speech acquisition, or acquired due to brain trauma. No one knows the exact causes of stuttering in a child.  It is considered to have a genetic basis, but the direct link has not yet been found. Children with relatives who stutter are 3 times as likely to develop stuttering. Stuttering is also more typical in children who have congenital disorders like  cerebral palsy .

A child who stutters is typically not struggling with the actual production of the sounds—stress and a nervousness trigger many cases of stuttering. Stuttering is variable, meaning if the speaker does not feel anxious when speaking, the stuttering may not affect their speech.

Language disorders can be classified in three different ways: Expressive Language Disorder (ELD), Receptive Language Disorder (RLD) or Expressive-Receptive Language Disorder (ERLD).  Children with Expressive Language Disorder do not have problems producing sounds or words, but have an inability to retrieve the right words and formulate proper sentences. Children with Receptive Language Disorder have difficulties comprehending spoken and written language. Finally, children with Expressive-Receptive Language Disorder will exhibit both kinds of symptoms. Grammar is a hard concept for them to understand and they may not use of articles (a, the), prepositions (of, with) and plurals. An early symptom is delay in the early stages of language, so if your child takes longer to formulate words or starting to babble, it can be a sign of ELD.

Children with Receptive Language Disorder may act like they are ignoring you or just repeat words that you say; this is known as “echolalia.” Even when repeating the words you say, they may not understand.  An example of this is if you say, “Do you want to go to the park?” and they respond with the exact phrase and do not answer the question. They may not understand you or the fact that you asked them to do something.

Children with Expressive-Receptive Language Disorder can have a mix of these symptoms

These are some of the most common speech disorders in children. No child is the same and you know your child best. If you feel that your child has a speech disorder, contact your pediatrician to discuss treatment options.

Dysarthria (difficulty speaking)

Dysarthria is where you have difficulty speaking because the muscles you use for speech are weak. It can be caused by conditions that damage your brain or nerves and some medicines. Speech and language therapy can help.

Immediate action required: Call 999 if:

• somebody's face droops on 1 side (the mouth or eye may have drooped)
• a person cannot lift up both arms and keep them there
• a person has difficulty speaking (speech may be slurred or garbled)

These can be signs of a stroke, which is a medical emergency. The symptoms of a stroke usually come on suddenly.

Do not drive yourself to A&E.

The person you speak to at 999 will give you advice about what to do.

Check if it's dysarthria

The main symptom of dysarthria is unclear speech. This can make it difficult for you to make yourself understood.

Your speech may only be slightly unclear, or you may not be able to speak clearly at all.

Other symptoms include:

• difficulty moving your mouth, tongue or lips
• slurred or slow speech
• difficulty controlling the volume of your voice, making you talk too loudly or quietly
• a change in your voice, making it nasal, strained or monotone
• hesitating a lot when talking, or speaking in short bursts instead of full sentences

Being stressed or tired may make your symptoms worse.

Dysarthria is not the same as dysphasia, although you can have both conditions at the same time. Dysphasia, also known as aphasia , is where you have difficulty understanding words or putting them together in a sentence.

Non-urgent advice: See a GP if:

• you've noticed gradual changes to your or your child's speech and you're worried

They'll examine you and may refer you to a specialist for further tests.

Causes of dysarthria

Dysarthria is usually caused by damage to the brain or conditions that affect the nervous system. It can happen at any age.

Common causes include:

• stroke , severe head injury and brain tumours
• Parkinson's disease , multiple sclerosis and motor neurone disease
• cerebral palsy and Down's syndrome

It can also be a side effect of certain medicines, such as some medicines to treat epilepsy.

Treatment for dysarthria

If you have dysarthria, you'll usually be referred to a speech and language therapist. They'll offer therapy to help your speech and communication.

The therapy you're offered will be different depending on the cause of your dysarthria and how severe it is.

Some people may find therapy does not help their symptoms, or their speech may get worse as their condition progresses. Their therapy may focus on helping communication in other ways.

Speech and language therapy may include:

• exercises to strengthen the muscles used for speech
• strategies to make your speech easier to understand, such as slowing down when you're talking
• using communication aids, such as an alphabet board or a voice amplifier

Find out more

• Headway: communication problems after brain injury
• Stroke Association: communication tools

Page last reviewed: 17 February 2023 Next review due: 17 February 2026