lateral corticospinal tract

lateral corticospinal tract

noun

Definition of LATERAL CORTICOSPINAL TRACT

: a band of nerve fibers that descends in the posterolateral part of each side of the spinal cord and consists mostly of fibers arising in the motor cortex of the contralateral side of the brain and crossing over in the decussation of pyramids with some fibers arising in the motor cortex of the same side—called also crossed pyramidal tract