Hypothalamic and Olfactory Control of Sexual Behavior and Partner Preference in Male Rats
Section snippets
EXPERIMENT 1. PERIPHERAL DEAFFERENTATION OF THE OLFACTORY BULBS: EFFECTS ON COPULATION AND PARTNER PREFERENCE
We reported that bilateral removal of the olfactory bulbs virtually eliminated mating and abolished a previously established preference for receptive females over nonreceptive females [7]. Effects of bulbectomy could be consequences of severely impaired olfactory perception, but might also result from a disruption of tonic input to the forebrain that has little or nothing to do with a sensory impairment per se. Larsson [18]reported that surgical deafferentation of the olfactory bulbs increased
EXPERIMENT 2. PERIPHERAL DEAFFERENTATION OF THE OLFACTORY BULBS ABOLISHES PARTNER PREFERENCE IN MALES WITH COPULATION-ELIMINATING MPAH LESIONS
Males with bilateral lesions of the MPAH show little or no mating, but continue to show a reliable preference for receptive females over nonreceptive females [6]. Although this preference is diminished relative to preoperative level, it is nonetheless clear that a strong and quite stable preference may persist for several months after lesioning. Preference could be maintained by inherently rewarding chemosensory cues unique to receptive females and/or olfactory cues that have acquired (through
Acknowledgements
This research was supported by National Science Foundation Grants IBN-9021579 and IBN-9421208. The authors thank the 3 anonymous referees for their helpful comments on an earlier version of this article.
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