Try Our Apps


Supposedly vs. Supposably

pyramidal tract

noun, Anatomy
any of four tracts of descending motor fibers that extend in pairs down each side of the spinal column and function in voluntary movement.
Origin of pyramidal tract
1885-90 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
Cite This Source
pyramidal-tract in Medicine

pyramidal tract n.
A massive bundle of fibers that originates from the motor cortex and the postcentral gyrus and emerges on the ventral surface of the medulla oblongata. Most of the fibers cross to the opposite side in the pyramidal decussation and descend the length of the spinal cord to innervate muscles of the extremities.

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

Word of the Day

Difficulty index for pyramidal tract

Few English speakers likely know this word

Word Value for pyramidal

Scrabble Words With Friends