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

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

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.

From Psychotherapy by Walsh, James J. (James Joseph)

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.

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.

From the internal capsule, the motor fibres pass as the pyramidal tract through the crusta of each crus cerebri, the pons and the medulla oblongata.

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