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any of the important nerve pathways on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral horn of the spinal cord

any of the important motor nerves on each side of the central nervous system that run from the sensorimotor areas of the cortex through the brainstem to motor neurons of the cranial nerve nuclei and the ventral horn of the spinal cord

Fibers that arise from cells within the cerebral cortex, pass through the medullary pyramid, and descend in the spinal cord. Many authorities say the pyramidal tracts include both the corticospinal and corticobulbar tracts.

a set of motor fibers going from the motor area and passing to the pyramids of the oblongata: they afterward become the p. tracts of the spinal cord.

the continuation in the spinal cord of the ventral pyramids of the oblongata.

A collection of nerve fibers in the spinal cord which may be traced from the point of origin of the lower sacral nerves upward in the posterior part of the lateral column to the lower part of the medulla oblongata, where they cross to the opposite side, enter the pyramid, and may be followed through it and the pons to the corresponding crus cerebri. Many of the fibers do not decussate, but run throughout their course in the anterior pyramidal t.