the distribution of substance p , somatostatin , cholecystokinin , vasoactive intestinal polypeptide , enkephalin and serotonin in axons , terminals and neurons was compared in the area surrounding the central canal ( lamina x ) at five representative levels of the monkey spinal cord , using peroxidase-antiperoxidase immunocytochemistry .
C0459414
central canal
C0037925
spinal cord