pyramidal tract

noun

, Anatomy.

1. any of four tracts of descending motor fibers that extend in pairs down each side of the spinal column and function in voluntary movement.

Word History and Origins

Origin of pyramidal tract¹

First recorded in 1885–90

Example Sentences

In the reflex, the lower center is aroused by a sensory nerve, and in the voluntary movement by the pyramidal tract.

From Project Gutenberg

These are cerebral influences acting by way of the pyramidal tract upon the spinal center for the reflex.

From Project Gutenberg

They included portions of all the tracts, the pyramidal tract as well.

From Project Gutenberg

The remaining fibres pass down as the direct pyramidal tract, and decussate in the cord near their termination.

From Project Gutenberg