#nerve_pathway__nervepathway__tract__nerve_tract__nervetract__pathway  a bundle of nerve fibers following a path through the brain
  supertype:  fiber_bundle__fiberbundle__fibre_bundle__fibrebundle__fascicle__fasciculus  a bundle of fibers (especially nerve fibers)
  subtype:  peduncle  a bundle of myelinated neurons joining different parts of the brain
  subtype:  corpus_callosum  a broad transverse nerve tract connecting the two cerebral hemispheres
  subtype:  pyramidal_tract__pyramidaltract__pyramidal_motor_system__pyramidalmotorsystem__corticospinal_tract__corticospinaltract  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

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