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: http://www.asha.org/public/speech/disorders/dysarthria.htm
Fournier, G. (2010). Dysarthria. Psych Central. Retrieved on February 13, 2016, from http://psychcentral.com/encyclopedia/dysarthria/