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A motor speech disorder caused by neurological damage and characterized by markedly diminished articulation and fluency.

Example: An elderly man with a history of left-hemisphere strokes is difficult to understand because he can’t form certain speech sounds.

Here is a link to the American Speech-Language-Hearing Association where you can learn in-depth information about this issue:

APA Reference
Fournier, G. (2016). Dysarthria. Psych Central. Retrieved on November 15, 2018, from