hypophysectomy , which led to the expected fall in serum prolactin to undetectable levels , and restraint stress , which resulted in a statistically significant 4-fold rise in serum prolactin , caused no change in prolactin concentrations in extrahypothalamic brain parts , indicating that brain pli is regulated independently of pituitary prolactin and of circulating serum prolactin levels .
C0086045
concentrations
C0006104
brain