lateral corticospinal tract

Definition: those fibers that cross to the opposite side in the corticospinal (pyramidal) decussation and descend in the posterior half of the lateral funiculus of the spinal cord; they are distributed throughout the length of the spinal cord to interneurons of the zona intermedia of the spinal gray matter, to some of the nuclei of the posterior horn, and to interneuron pools of the anterior horn.

Synonym(s): tractus corticospinalis lateralisTA, crossed pyramidal tract, fasciculus corticospinalis lateralis, fasciculus pyramidalis lateralis, lateral pyramidal fasciculus, lateral pyramidal tract, tractus pyramidalis lateralis

See Also: corticospinal tract

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