Tract,Pyramidal
《英文msh詞典》Tract,Pyramidal
[入口詞] Tract,Pyramidal
[主題詞] Pyramidal Tracts
[英文釋義] 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.