corticospinal tract
Acronym:
The term corticospinal tract refers to a fiber pathway from the cerebral cortex to the spinal cord. Its fibers originate from pyramidal neurons of the precentral gyrus, and on their way to the spinal cord, they pass through parts of the cerebral white matter (including the posterior limb of the internal capsule), the crus cerebri, the longitudinal pontine fibers, the pyramid of the medulla (where they are known as the pyramidal tract) and the pyramidal decussation. In the ducussation, some fibers cross to the other side of the brainstem to form the lateral corticospinal tract. Those fibers that do not cross split to form the anterolateral corticospinal tract and the anterior corticospinal tract. The pathway is not readily distinguished in myelin stained cross-sections of the cerebral white matter ( Carpenter-1983 ).

Also known as: corticospinal fibersNeuroNames ID : 1320


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