the cytoarchitecture and immunocytochemical distribution of neuropeptides ( corticotropin-releasing factor , crf ; neuropeptide y , npy ; oxytocin , oxy ; vasopressin , vp ; and vasoactive intestinal polypeptide , vip ) were studied in the hypothalamic suprachiasmatic nuclei ( scn ) in male and female ground squirrels of two species ( spermophilus tridecemlineatus and s. richardsonii ) .
C0020663
hypothalamic
C0038866
suprachiasmatic nuclei