Connection lost. Please refresh the page.
Get help How to study Login Register
Ready to learn?
Pick your favorite study tool

Lateral corticospinal tract

Recommended video: Pyramidal tracts [17:43]
The most important motor pathways of the CNS.

The lateral corticospinal tract is one of the two divisions of the corticospinal pathway and is the largest descending motor pathway in the body. The lateral corticospinal tract is responsible for the voluntary movement of the contralateral upper and lower limbs.

The upper motor neurons, the giant pyramidal cells (of Betz), descend from the primary motor cortex until the medulla oblongata, where 75-90% of them decussate (pyramidal decussation), forming the lateral corticospinal tract. The tract fibers then continue caudally through the lateral funiculus of the spinal cord, synapsing with lower motor neurons in the anterior grey horn on the same side. These lower motor neurons exit the spinal cord through the ventral roots to form peripheral nerves which innervate the skeletal muscles of upper and lower limbs.

Terminology English: Lateral corticospinal tract
: Tractus corticospinalis lateralis
Definition Descending motor pathway travelling responsible for voluntary movement of upper and lower limb muscles
Origin V layer of the cerebral cortex

Learn more about the pyramidal tracts with this study unit (and article):

Lateral corticospinal tract: want to learn more about it?

Our engaging videos, interactive quizzes, in-depth articles and HD atlas are here to get you top results faster.

What do you prefer to learn with?

“I would honestly say that Kenhub cut my study time in half.” – Read more.

Kim Bengochea Kim Bengochea, Regis University, Denver
© Unless stated otherwise, all content, including illustrations are exclusive property of Kenhub GmbH, and are protected by German and international copyright laws. All rights reserved.

Register now and grab your free ultimate anatomy study guide!