Dysarthrias of movement disorders.

Following the seminal works of Canter (152) and Darley, et al. (1) concerning differential diagnosis and classification of dysarthria, considerable strides have been made with regard to characterizing the features of speech that occur with disorders of movement. Research should continue to address the neurophysiologic substrates of the dysarthrias of movement disorders, and most importantly, efficacious means of treating these impairments of speech.