Conditions We Treat: Adults

Motor Speech Disorders in Adults

Therapy for conditions such as dysarthria and apraxia that affect how clearly a person can produce speech, rebuilding the strength, coordination or planning that speech needs.

What Are Motor Speech Disorders?

Speaking starts with an idea, a plan for how to express it, and finally the physical act of producing it — and that last step relies on precise coordination between the brain and the muscles of the tongue, jaw, lips, and more. A motor speech disorder develops when something interferes with either the planning side of that process or the muscles themselves. The two main types are apraxia and dysarthria, and common underlying causes include brain injury, muscle weakness, and degenerative disease. Beyond the communication challenges themselves, motor speech disorders can weigh on a person's self-esteem and overall quality of life.

A man and his speech therapist hold a conversation in a bright officeMotor speech disorders affect the muscles and planning behind speech.

Dysarthria and Apraxia

The two primary motor speech disorders show up quite differently.

  • Dysarthria — often described as slurred speech, this is slow, distorted speech caused by weakness, paralysis, or reduced control over the speech muscles, commonly from stroke, traumatic brain injury, degenerative brain disorders, or brain tumors
  • Apraxia — the inability to make voluntary speech movements even though muscle function itself is normal; the person knows exactly what they want to say, but the brain struggles to coordinate the muscles needed to say it

Signs of a Motor Speech Disorder

Someone with a motor speech disorder may clearly be trying to form words but struggle to get them out clearly — often managing a single word fine, only to lose clarity as a sentence goes on. Specific symptoms vary with the type and severity of the disorder.

  • Repeating or prolonging sounds
  • Speaking very softly
  • Struggling to produce the correct sound or word
  • Adding extra syllables or sounds to words
  • Distorting sounds
  • Trouble pronouncing words correctly
  • Reordering syllables within a word
  • A raspy voice quality

How Speech Therapy Can Help

We start with a comprehensive speech and language evaluation to determine the severity and nature of the disorder — many people with a motor speech disorder also have other communication challenges tied to an underlying neurological condition, so the full picture matters. From there, we build a customized treatment plan aimed at improving speech ability and overall communication.

Treating Apraxia

Apraxia of speech develops from damage to the part of the brain that controls how we speak, and patients often struggle specifically with sequencing the sounds within words — even though they know exactly what word they want to say. Treatment typically involves retraining the speech muscles to produce sounds correctly and string them together into words, using repeated practice with vowels, syllables, words, and phrases, along with training to slow speech down enough to produce every sound clearly.

A therapist demonstrates a mouth shape with a hand mirror for a young womanTherapy starts with how each sound is made.

Treating Dysarthria

Dysarthria develops when the muscles of the face, mouth, or respiratory system weaken or stop moving properly, usually after a brain injury or stroke, and its severity and specific presentation depend on which part of the brain was affected. We evaluate lip, face, and tongue movement, along with breath support and voice quality, and build a customized plan around the specific symptoms present.

An older woman reads aloud from a magazine while her therapist listens and nodsSlow, steady speech is clearer speech.

Treatment Techniques We Use

The core of treatment is speech therapy exercises that strengthen the muscles responsible for producing speech sounds, often combining several specific techniques.

  • Target selection — practicing the specific complex sounds or words that trigger the most inconsistency
  • Contextual utilization — learning to recognize speech sounds across different syllable-based contexts, with extra focus on vowel-heavy words that tend to be more difficult
  • Contrast therapy — practicing word pairs that differ by one or more speech sounds, like "beat" and "feet," introduced as treatment progresses
  • Oral-motor therapy — exercises focused on motor control, muscle strength, and breath control, including repetitive facial movements that build range of motion and strength for smoother, more natural-sounding speech
  • Over-articulation and phrasing — exaggerating the movement of the cheeks, tongue, and lips to produce clearer short sounds, paired with phrasing exercises that slow speech down by limiting the number of words produced per breath

Goals for Motor Speech Disorder Treatment

Dysarthria symptoms vary depending on which part of the brain was affected and the type involved — common signs include slurred speech, altered voice quality, whispered speech, and reduced tongue or facial muscle movement. Apraxia, by contrast, typically shows up as inconsistent sound errors, trouble repeating words accurately, and general difficulty producing sound. Because symptoms differ so much from person to person, we build a specialized program for each patient, generally working toward these goals.

  • Improving breath support so the patient can speak more loudly
  • Building strength in the muscles that move the lips, mouth, and jaw
  • Improving articulation for more precise speech
  • Teaching caregivers and family members strategies for easier communication with the patient
  • Helping the patient produce sounds and words correctly by teaching the right movement, sequencing, and timing needed to say them
A man gives a thumbs up beside his speech therapist after finishing a speaking exerciseClear goals, built around each person.

Our Approach to Treatment

A speech-language pathologist becomes an important part of your life as they help you communicate more easily with family and friends, so finding the right fit matters. We offer consultation, thorough screening, and treatment for motor speech disorders as a specialized, family-oriented practice, with a strong emphasis on caregiver education and training alongside direct work with the patient.

A man and his therapist laugh together in a rehabilitation clinicProgress is built one conversation at a time.

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