Modification of Lip Hypertonia in Dysarthria Using EMG Feedback This is a case report of an attempt to reduce the postural hypertonicity in certain facial muscles of a Parkinsonian patient. We believed that such a reduction would facilitate the movements of the lip during speech. The patient, a 64-year-old woman with a 15-year history of Parkinsonism, had complete bilateral ... Case Reports
Case Reports  |   February 01, 1973
Modification of Lip Hypertonia in Dysarthria Using EMG Feedback
 
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Article Information
Case Reports   |   February 01, 1973
Modification of Lip Hypertonia in Dysarthria Using EMG Feedback
Journal of Speech and Hearing Disorders, February 1973, Vol. 38, 131-140. doi:10.1044/jshd.3801.131
 
Journal of Speech and Hearing Disorders, February 1973, Vol. 38, 131-140. doi:10.1044/jshd.3801.131

This is a case report of an attempt to reduce the postural hypertonicity in certain facial muscles of a Parkinsonian patient. We believed that such a reduction would facilitate the movements of the lip during speech. The patient, a 64-year-old woman with a 15-year history of Parkinsonism, had complete bilateral retraction of the upper lip, with associated eye squint and wrinkling of the forehead. Her attempts at bilabial consonants were produced with lower lip contacts against the upper teeth. Surface electrodes were placed over muscles that were contracting to retract the upper lip. The patient was presented with a tone whose frequency was analogous to the voltages recorded from the electrodes. Her task was to concentrate on lowering this tone and, hence, the hypertonicity in the lip. At the close of five half-hour sessions, the patient demonstrated considerable progress toward removing the undesirable lip retraction. Speculations about the basis of these neuromuscular modifications and the origin of the lip retraction are presented.

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