Biol Reprod Keystone Symposia Conference on Frontiers in Reproductive Biology & Regulation of Fertility.
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Biology of Reproduction, Vol 24, 766-770, Copyright © 1981 by Society for the Study of Reproduction

Influence of the Extrahypothalamic Brain on Luteinizing Hormone Release in the Ovariectomized, Estrogen-Treated Rat

JAMSHID RABII 1

1 Department of Physiology and the Bureau of Biological Research, Rutgers University. Piscataway, New Jersey 08854


Ovariectomized (OVX) rats respond to estrogen administration by exhibiting daily afternoon surges of luteinizing hormone (LH). Interruption of neural pathways reaching the hypothalamus from the limbic system resulted in the inhibition of the estrogen-induced LH release in OVX rats. Bilateral lesion of the amygdaloid complex (AMYG) was also effective in inhibiting this LH surge. These data suggest that the mechanism by which estrogen induces an LH surge in OVX rats involves the participation of the limbic system, in particular the AMYG.

Note:
ACKNOWLEDGMENTS I wish to thank Mary McDonald and Melinda Wagner for their expert technical assistance. Statistical analysis of the data was accomplished with the generous help of Dr. Michael Friedman (Dept. of Statistics, Rutgers University).

Submitted on September 15, 1980
Accepted on December 23, 1980






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Copyright © 1981 by the Society for the Study of Reproduction.