Specific

brainstem structure central canal of spinal cord cerebral peduncle circumventricular organ CNS white matter CNS white matter tract cuneate tubercle facial colliculus gracilis tubercle gray matter hypoglossal trigone inferior medullary velum median eminence of brainstem spinal cord (spinal marrow) spinal cord structure suprapineal recess tuberculum cinereum vagal trigone Virchow-Robin space