Slurred Speech

Slurred Speech Treatment

Slurred speech, sometimes described as mumbled or unclear speech, occurs when a person has difficulty producing words and speech sounds clearly. Sounds may be only partially produced, words may blend together in sentences, or speech may sound unusually slow or difficult to understand.

Slurred speech can occur when the muscles used for speech do not move with the strength, speed, coordination, or accuracy needed for clear speech. Depending on the underlying cause, a person may experience changes in their speech clarity, voice, speaking rate, and overall communication abilities.

A Speech-Language Pathologist can assess these changes and recommend appropriate slurred speech treatment and communication strategies based on the individual’s needs.

Slurred Speech and Dysarthria

Slurred speech is commonly associated with dysarthria, a motor speech disorder involving difficulty controlling the muscles used to produce speech.

Dysarthria may affect the muscles of the:

• Lips
• Tongue
• Jaw
• Face
• Throat
• Larynx, or voice box
• Muscles involved in breathing for speech

When these speech muscles become weak, slow, poorly coordinated, or difficult to control, a person may produce slurred or slow speech. Speech may sound mumbled, quiet, strained, hoarse, or uneven depending on which muscles and parts of the nervous system are affected.

Dysarthria differs from a language disorder because the primary difficulty involves motor speech rather than understanding or formulating language.

Symptoms of Dysarthria

People with dysarthria may experience:

• Slurred or unclear speech
• Slow speech or an unusually rapid speaking rate
• Difficulty controlling the tongue, lips, or facial muscles
• Reduced speech clarity
• Difficulty producing certain words or sounds
• Speech that becomes harder to understand in longer sentences
• A weak, breathy, strained, or hoarse voice
• Difficulty controlling loudness
• Reduced coordination between breathing and speaking
• Changes in the rhythm or quality of speech

The symptoms of dysarthria vary considerably. Some people may have mild difficulty communicating, while others may require additional communication strategies to participate effectively in conversations and daily life.

What Can Cause Slurred Speech?

Dysarthria can occur when an illness, injury, or neurological condition affects the brain, nervous system, or muscles responsible for speech.

Common causes may include:

• Stroke
• Brain injury
• Traumatic brain injury
• Multiple sclerosis
• Cerebral palsy
• Amyotrophic lateral sclerosis (ALS)
• Muscular dystrophy
• Other neurological conditions
• Conditions affecting muscle strength or motor control

A brain tumour or other medical condition affecting areas involved in speech may also contribute to motor speech difficulties.

Because treatment depends on the underlying cause, appropriate medical assessment may be required alongside speech-language pathology services.

Speech-Language Pathology Assessment

A Speech-Language Pathologist can assess a person’s motor speech and communication skills to determine the nature and severity of their difficulties.

Assessment may examine:

• Speech clarity and intelligibility
• Strength and movement of the lips, tongue, jaw, and facial muscles
• Speaking rate
• Voice quality and loudness
• Breathing for speech
• Ability to produce speech sounds and words
• Communication abilities during conversation
• How the speech difficulty affects everyday activities

The assessment helps determine whether symptoms are consistent with dysarthria or another motor speech disorder and supports the development of an individualized treatment plan.

Dysarthria Therapy and Communication Strategies

Dysarthria therapy is tailored to the person’s abilities, goals, and underlying condition. Speech therapy may focus on helping the individual improve communication rather than trying to treat the medical condition responsible for the speech changes.

Treatment may include strategies to:

• Produce clearer speech sounds
• Speak slowly or use an appropriate speaking rate
• Use shorter sentences when helpful
• Improve breath support for speech
• Speak louder when clinically appropriate
• Improve coordination of the muscles used for speech
• Emphasize important words
• Use pacing and other strategies to improve speech clarity
• Develop alternative communication strategies when speech alone is not sufficient

Family members and other communication partners may also learn strategies to support successful conversations.

At S.L. Hunter SpeechWorks, a Speech-Language Pathologist can assess slurred speech, dysarthria, and other motor speech difficulties and recommend treatment based on the individual’s communication needs.

Contact S.L. Hunter SpeechWorks to learn more about slurred speech treatment, dysarthria therapy, speech assessment, and communication support.