pyramidal tract

American  

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.

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Etymology

Origin of pyramidal tract

First recorded in 1885–90

Example Sentences

See Examples For:

pyramidal tract

The upper part of this path, consisting of axons issuing from the giant pyramids of the motor area and extending down into the spinal cord, is the pyramidal tract.

From Psychology A Study Of Mental Life by Woodworth, Robert S.

The motor area of the brain has no direct connection with any muscle, but acts through the pyramidal tract on the lower centers, which in turn act on the muscles.

From Psychology A Study Of Mental Life by Woodworth, Robert S.

The pyramidal tract is the more important clinically.

From Manual of Surgery Volume Second: Extremities—Head—Neck. Sixth Edition. by Miles, Alexander

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

From Psychology A Study Of Mental Life by Woodworth, Robert S.

The lower center can be aroused in quite another way, and that is by nerve currents coming from the brain, by way of the motor area and the pyramidal tract.

From Psychology A Study Of Mental Life by Woodworth, Robert S.