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A role for medial preoptic nucleus on afternoon of proestrus in female rats

A role for medial preoptic nucleus on afternoon of proestrus in female rats E. of Medice, University EI, STANLEY J. WIEG, WILLIAM E. . A role for medial on afternoon of proestrus female . Am. J. Physiol 238 (Endocrol. Metab. 1): E533-E539, 1980.-The functional role of the medial (MPN), a small periventricular located immediately caudal to the organum vasculosum of the lama termalis, on release of luteizg hormone durg the critical period of proestrus was examed female . 1) To block ovulation, bilateral electrolytic lesions were made MPN, the periventricular part of the medial area (PMP) just dorsal to MPN, or the suprachiasmatic (SCN), on morng. The followg morng animals with MPN or PMP, but not SCN lesions were found to have spontaneous ovulation blocked completely. However, subsequent cyclic ovulations PIMP-lesioned animals were dicated by resumption of vagal cyclicity, whereas MPN-lesioned animals became persistently estrous. 2) To overcome the ovulation blockade caused by MPN or PMP lesions, electrochemical stimulation was unilaterally applied to the bed of stria termalis (BST) on afternoon. Stimulation failed to duce ovulation MPN-lesioned , whereas it was effective PMP-lesioned . Thus, the major portion of the neurons necessary for the release of LH-releasg hormone on afternoon are located MPN, the neurons BST that mediate gonadotrop release after http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png AJP - Endocrinology and Metabolism The American Physiological Society

A role for medial preoptic nucleus on afternoon of proestrus in female rats

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Publisher
The American Physiological Society
Copyright
Copyright © 1980 the American Physiological Society
ISSN
0193-1849
eISSN
1522-1555
Publisher site
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Abstract

E. of Medice, University EI, STANLEY J. WIEG, WILLIAM E. . A role for medial on afternoon of proestrus female . Am. J. Physiol 238 (Endocrol. Metab. 1): E533-E539, 1980.-The functional role of the medial (MPN), a small periventricular located immediately caudal to the organum vasculosum of the lama termalis, on release of luteizg hormone durg the critical period of proestrus was examed female . 1) To block ovulation, bilateral electrolytic lesions were made MPN, the periventricular part of the medial area (PMP) just dorsal to MPN, or the suprachiasmatic (SCN), on morng. The followg morng animals with MPN or PMP, but not SCN lesions were found to have spontaneous ovulation blocked completely. However, subsequent cyclic ovulations PIMP-lesioned animals were dicated by resumption of vagal cyclicity, whereas MPN-lesioned animals became persistently estrous. 2) To overcome the ovulation blockade caused by MPN or PMP lesions, electrochemical stimulation was unilaterally applied to the bed of stria termalis (BST) on afternoon. Stimulation failed to duce ovulation MPN-lesioned , whereas it was effective PMP-lesioned . Thus, the major portion of the neurons necessary for the release of LH-releasg hormone on afternoon are located MPN, the neurons BST that mediate gonadotrop release after

Journal

AJP - Endocrinology and Metabolism – The American Physiological Society

Published: Jun 1, 1980

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