extrapyramidal system
noun Anatomy.
the part of the central nervous system, including the descending motor fibers other than those of the pyramidal tract, that regulates muscle tone, posture, and other aspects of body movement.
Origin of extrapyramidal system
First recorded in 1960–65
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019