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Dysarthria is a motor speech disorder. It results from impaired movement of the muscles used for speech production, including the lips, tongue, vocal folds, and/or diaphragm. The type and severity of dysarthria depend on which area of the nervous system is affected.
Dysarthria is caused by damage to the brain. This may occur at birth, as in cerebral palsy or muscular dystrophy, or may occur later in life due to one of many different conditions that involve the nervous system, including stroke, brain injury, tumors, Parkinson's disease, Lou Gehrig's disease/amyotrophic lateral sclerosis (ALS), Huntington's disease,multiple sclerosis.
A speech-language pathologist might evaluate your speech to help determine the type of dysarthria you have. This can be helpful to the neurologist, who will look for the underlying cause. Imaging tests, Brain and nerve studies, Blood and urine tests, Lumbar puncture (spinal tap) are some test suggested by physicians. Around 85% of cases arise from strokes and around a third of people who have strokes will have dysarthria.