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

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.

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.

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.

Injury to the motor area or to the pyramidal tract does not destroy reflex movement, but cuts off all voluntary movement and cerebral control.

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.