Abstract
Malateral aspiration of the olfactory bulbs facilitates the hormonally induced display of sexual receptivity (lordosis) in spayed female rats. The facilitating effect of bulbectomy is apparent under conditions of estrogen stimulation alone, or after estrogen-progesterone treatment. Moreover, facilitation occurs even when bulb removal is subtotal. Peripherally induced anosmia does not affect the hormonally induced display of lordotic behavior in female rats, indicating that the effect of bulbectomy is not due to the production of anosmia per se. Apparently the olfactory bulbs constitute a source of tonic inhibition upon other neural systems, such that bulb removal enhances the hormonally induced expression of lordotic behavior.
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