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

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

From Arteriosclerosis and Hypertension: with Chapters on Blood Pressure, 3rd Edition. by Warfield, Louis Marshall

The pyramidal tract conveys impulses that inhibit muscle tonus, while the rubro-spinal tract is the path by which excitatory impulses travel.

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

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

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

The "Motor path" is the pyramidal tract, only the beginning of which is shown here, its further course being indicated in Fig.

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.