Signs to look for
- Speech that sounds slurred, mumbled or imprecise
- Voice that is soft, monotone, hoarse or strained
- Speech that is too fast, too slow or has an uneven rhythm
- Running out of breath while talking
- Nasal-sounding speech
- Family, friends or strangers often asking you to repeat
- Avoiding phone calls or group conversations because speaking takes effort
What it is
Dysarthria is a motor speech disorder. It happens when a neurological condition affects the muscles used for speaking: the lips, tongue, jaw, soft palate, vocal folds and breathing muscles. The person knows what they want to say, but the movements needed to say it are weaker, slower, less coordinated or less precise.
Dysarthria can make speech sound slurred, soft, monotone, nasal, rushed or uneven. It does not affect intelligence. It is different from aphasia, which affects language itself, although some people have both.
Common causes
- Stroke
- Parkinson’s disease
- Multiple sclerosis (MS)
- Traumatic brain injury (TBI)
- Cerebral palsy
- Other neurological conditions, such as ALS or muscular dystrophy
The cause shapes the plan. After a stroke or brain injury, speech often improves over time with therapy. In progressive conditions, the focus is on keeping communication effective for as long as possible.
If speech becomes slurred suddenly, especially with facial drooping, arm weakness or confusion, call 911. These can be signs of a stroke and need emergency care, not a speech therapy appointment.
Who we see
- Adults after a stroke or brain injury, often after discharge from hospital or rehabilitation, who want to keep working on their speech.
- Adults with Parkinson’s disease, MS or other neurological conditions, from early changes onward.
- Children and teens with cerebral palsy or other conditions affecting the movements for speech.
- Family members and caregivers who want to communicate more easily with the person they support.
How we assess it
The assessment starts with your medical history, what has changed, and the situations where speech is hardest for you. If you have reports from a hospital or rehabilitation team, please bring them.
The speech-language pathologist then looks at how the speech muscles move at rest and during speech, and listens to breathing, voice, resonance, articulation and rhythm. We measure how understandable your speech is in words, sentences and conversation, and we ask about fatigue, confidence and daily life. Because dysarthria can also come with swallowing changes, we ask about eating and drinking and will suggest a swallowing assessment if needed.
You will receive a clear explanation of what we found and a plan built around your priorities. Learn more about our assessment process.
How therapy works at VoxLingue
The goal of dysarthria therapy is not perfect speech. It is being understood, with less effort, by the people and in the places that matter to you.
Speaker strategies
Your clinician helps you choose and practise strategies such as:
- Slowing your rate, for example by pausing between phrases.
- Speaking louder with good breath support.
- Over-articulating, or exaggerating the movements of consonants.
- Putting key words at the end of a short phrase and stressing them.
- Taking a breath before you start, and speaking in shorter chunks.
Intensive and targeted approaches
For many people with Parkinson’s disease, research supports intensive therapy that trains a louder voice and greater speaking effort. Other exercises may target breath support, voice or specific sounds. Your clinician will explain the evidence for each option and what it asks of you.
Listener and environment strategies
Communication is a two-way effort. We teach family members to face the speaker, reduce background noise, confirm what they understood and say which part they missed rather than asking the person to repeat everything.
AAC and planning ahead
When speech alone is not enough, augmentative and alternative communication (AAC) can help. This may be an alphabet board, a phone app or a speech-generating device, used alongside speech. In progressive conditions, it can help to explore these options early, while you can choose calmly. See our page on AAC.
Your role at home
Short, regular practice helps strategies become automatic. Your clinician will give you a home program, often a few minutes several times a day. Family members can help by practising with you, gently reminding you of the strategy you are working on, and using listener strategies themselves. Fatigue affects speech in many neurological conditions, so planning important conversations for times when you have more energy can help.
Bilingual and multilingual families
Many of the people we see speak more than one language at home and at work. Dysarthria can affect languages differently, because each language uses different sounds, rhythms and melodies.
Our team works in English and French, and clinicians on the team speak many other languages. We look at the languages you use most and practise strategies in the language of your important conversations, whether that is with a grandchild, a colleague or a doctor. Availability of specific languages varies, and we will match you as closely as we can.
In person or by telepractice
You can see us in person at our Marché Central clinic in Montréal, or by telepractice anywhere in Quebec and Ontario. Telepractice can be a good option for people for whom travel is tiring or difficult, and it lets a family member join from home. Your clinician will help you decide which format works best, and may suggest in-person sessions for parts of the assessment.
Getting started
You do not need a physician referral. If you or someone close to you is having trouble being understood since a neurological event or diagnosis, an assessment is a practical first step.
Call our Marché Central clinic at 514-467-9132, or request an appointment through our contact form. We will talk about your needs and match you with a clinician whose experience fits your situation.
Frequently asked questions
What is the difference between dysarthria and aphasia?
Dysarthria affects the muscles and movements used to speak, so speech may be slurred or soft, but finding and understanding words is usually intact. Aphasia affects language itself. Some people have both, and an assessment helps tell them apart.
Can dysarthria improve?
It depends on the cause. After a stroke or brain injury, many people make gains with therapy, especially in the months after the event. In progressive conditions, therapy focuses on maintaining clear communication for as long as possible and planning ahead.
My speech changed suddenly. Should I book speech therapy?
No, see a doctor first. Sudden slurred speech, especially with facial drooping, weakness or confusion, can be a sign of stroke. Call 911 right away.
Is there therapy specific to Parkinson's disease?
Yes. Research supports intensive approaches that focus on vocal loudness and effort for many people with Parkinson's disease. Your clinician will explain the options that fit your situation.
Will I need a communication device?
Not necessarily. Many people improve their speech with strategies alone. When speech is very hard to understand, or in progressive conditions, AAC such as an alphabet board, an app or a speech-generating device can support communication alongside speech.
Can family members join sessions?
Yes, and we encourage it. Listeners can learn strategies that make conversations easier for everyone.
Related areas of care
- Aphasia and acquired communication disorders after stroke or brain injuryTherapy for adults whose language or communication has changed after a stroke, brain injury or other neurological event, with practical support for the people closest to them.
- Swallowing and feeding therapy for children and adultsAssessment and therapy for swallowing difficulties in adults and feeding difficulties in children, carried out with safety first and in collaboration with physicians.
- Augmentative and alternative communication (AAC)Support for people whose speech does not yet meet all their communication needs, using signs, pictures or speech-generating devices alongside speech.
- Voice therapy for hoarseness, vocal nodules and professional voice usersTherapy for hoarse, tired or strained voices in children, teens and adults, including teachers, singers and other professional voice users, in collaboration with ENT physicians.


