Possible role of the medial basal prechiasmatic area in the release of LH and prolactin in rats.

perimental animals were Wistar female rats maintained under controlled lighting. LH, FSH and prolactin in serum and pituitary were determined by means of double antibody radioimmunoassay. The results were as follows:1) Electrical stimulation (100Hz, 0.1ms and 100ƒÊA) of the PVA through chronically implanted electrode at 12:00 on the day of proestrus increased the serum concentrations of LH and prolactin, but not FSH. 2) Rats with neural isolations of the PVA by a small J-shaped knife resumed their 4-day cycles within 5 to 7 weeks, but some of rats had abnormal uterine balooning on the day