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Endocrinology, Vol 99, 959-962, Copyright © 1976 by Endocrine Society

ARTICLES

Effect of surgical disconnection of the medial basal hypothalamus on postcoital reflex ovulation in the rabbit

LM Voloschin and EA Gallardo

The effects of hypothalamic transections of varying lengths on reflex ovulation in the rabbit are reported. Circular cuts which surgically isolated the medial basal hypothalamus (MBH) from the remainder of the brain did not prevent copulation 4 to 24 h later, but did block reflex ovulation. On the contrary, hemicircular cuts of either the rostral, caudal or one lateral haf of the circular cut did not prevent reflex ovulation. These results suggest that coital stimuli reach the MBH through a diffuse network of fibers and that only very extensive deaferrentation of the MBH can cause blockade of ovulation in rabbits. These data are compared with results of other investigators in which anterior deafferentation of the MBH blocked reflex and spontaneous ovulation in rats.




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Endocrinology Endocrine Reviews J. Clin. End. & Metab.
Molecular Endocrinology Recent Prog. Horm. Res. All Endocrine Journals
Copyright © 1976 by The Endocrine Society