Acquired Speech Disorders in Adults
Dysarthria
Understanding Dysarthria
Acquired Dysarthria is a motor speech disorder that develops in adults due to damage to the central or peripheral nervous system. It affects the muscles you use to speak, often making it difficult to control the rate, rhythm, pitch, and clarity of your speech.
Causes of Acquired Dysarthria
Dysarthria occurs when there is damage to the brain and nerves responsible for controlling the muscles of the lips, tongue, vocal cords, and diaphragm. It is often a symptom of an underlying neurological event or condition.
Common causes include:
Stroke: The most frequent cause, resulting from interrupted blood flow to the brain.
Traumatic Brain Injury (TBI): Damage from accidents or external force.
Progressive Neurological Diseases: Conditions that worsen over time, such as:
Parkinson’s Disease
Multiple Sclerosis (MS)
Amyotrophic Lateral Sclerosis (ALS) (Lou Gehrig's disease)
Brain Tumors
Infections (e.g., encephalitis)
Signs and Symptoms
Slurred or Mumbled Speech: Difficulty articulating words clearly.
Speaking Too Slowly or Too Quickly: An altered rate of speech.
Monotone or Changes in Pitch: Speaking without normal variation in vocal tone.
Abnormal Volume: Speaking too softly.
Shortness of Breath or Poor Breath Support: Difficulty coordinating breathing with speech.
Changes in Voice Quality: A hoarse, breathy, or nasal-sounding voice.
Difficulty Moving Facial Muscles: Trouble moving the tongue, lips, and jaw.
How a Speech-Language Pathologist (SLP) Can Help
A Speech-Language Pathologist (SLP) specializes in diagnosing and treating communication difficulties associated with acquired dysarthria. Through a comprehensive evaluation, the SLP will:
Determine the Type of Dysarthria: Assess your speech errors (e.g., slurring, speaking too fast or too slow) to identify the specific type and severity of muscle weakness or incoordination.
Evaluate Motor Speech Abilities:
Examine the strength and coordination of your mouth, tongue, and lips.
Assess your breathing and voice quality (pitch and loudness).
Create a Personalized Treatment Plan:
Treatment focuses on improving intelligibility (how clearly you can be understood).
Techniques may include strategies for slowing speech rate, improving articulation (mouth movements), and increasing vocal loudness.
For severe cases, the SLP may introduce Augmentative and Alternative Communication (AAC) systems.