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

Excitatory pyramidal tract neurons, which reside in a region called layer 5 in the anterior lateral motor cortex, communicate with other neurons located many thousands of cell diameters away by establishing physical contacts.

Read more on Nature

The direct pyramidal tracts occur only in man and man-like apes.

Read more on Project Gutenberg

It seems to produce a sclerosis of the pyramidal tracts of the cord.

Read more on Project Gutenberg

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

Read more on Project Gutenberg

In some so much of the pyramidal tract remains uncrossed that there may be decided weakness on the same side as the lesion in the brain.

Read more on Project Gutenberg