Speech impairment (adult)

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Brain

Speech impairment may be any of several speech problems, particularly the following:

• Dysarthria is difficult, poorly pronounced speech, such as slurring.
• Aphasia is a problem with expressing or understanding written or spoken language.

Language impairment; Impairment of speech; Inability to speak; Aphasia; Dysarthria; Slurred speech; Dysphasia

DYSARTHRIA

Dysarthria is generally apparent in daily conversation where there is difficulty expressing certain sounds or words. This condition may be caused by taking excess medications such as narcotics, phenytoin, or carbamazepine. Alcohol intoxication causes dysarthria.

Degenerative neurological (nervous system) disorders affecting the cerebellum, basal ganglia, or brainstem (all are important parts of the brain) can also cause dysarthria. Stroke that affects the brainstem or cerebellar regions can also cause dysarthria. Any facial weakness, such as Bell's palsy or tongue weakness, can cause dysarthria.

APHASIA

Aphasia is loss of communication skills that were previously learned. It commonly occurs following strokes, or in people with brain tumors or degenerative diseases that affect the language areas of the brain. This term does not apply to children who have never developed communication skills.

In some cases of aphasia, the problem eventually corrects itself, but in others the condition is irreversible.

DYSARTHRIA

• Poorly fitting dentures
• Alcohol intoxication
• Side effects of medications that act on the central nervous system
• Degenerative neurological disorders, such as Parkinson disease or Huntington disease (more common in dysarthria than aphasia)
• Stroke
• Transient ischemic attack (TIA)
• Head trauma
• Other dementias

• Head trauma
• Alzheimer's disease
• Stroke
• Transient ischemic attack (TIA)
• Brain tumor (more common in aphasia than dysarthria)
• Other dementias

Review Date: 09/07/2006
Reviewed By: Kenneth Gross, M.D., Neurology, North Miami, FL. Review provided by VeriMed Healthcare Network.