Abstract
This study examined the site of main integration center in the physical stress-induced inhibition of ovarian estradiol secretion because of ovarian sympathetic nerve (superior ovarian nerve: SON) activation in anesthetized rats. In central nervous system-intact rats, electrical stimulation of the tibial afferent nerve at 10V increased the efferent activity of the SON by 39±13% and reduced the ovarian secretion of estradiol by 34±7%. These responses were observed in decerebrate rats but were abolished in spinal rats. Thus, the main integration center for this ovarian hormonal response is located in the brain stem.
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