extrapyramidal disease

Medical Dictionary

extrapyramidal disease n.
A degenerative disease, such as Parkinsonism or chorea, that affects the corpus striatum of the brain or other part of the extrapyramidal motor system and is characterized by tremor, muscular rigidity or weakness, and involuntary movements.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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