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.
Signs and symptoms
A person with dysarthria may demonstrate the following speech characteristics like slurred, choppy, or mumbled speech that may be difficult to understand, slow rate of speech, rapid rate of speech with a "mumbling" quality, limited tongue, lip, and jaw movement, abnormal pitch and rhythm when speaking etc.
Dysarthria can affect any of the muscles involved in speech production, including the muscles used for articulation or pronunciation (such as muscles in the lips, tongue, or jaw) as well as the muscles controlling nasality, phonation, and respiration. The result may be weak or uncoordinated movement, slow movement, or loss of movement.