the site of action of the inhibitory effect of somatostatin ( srif ) on its own release was studied by : ( 1 ) measuring srif release in vitro from tissue preparations containing either the proximal ( periventricular hypothalamus ) or the distal ( median eminence ) portions of the hypothalamic srif neurons , and ( 2 ) immunocytochemical investigation of the interconnections occurring between srif neuronal elements in these hypothalamic regions .
C0037659
srif
C0020663
hypothalamic