EFFECT OF AMYGDALOID LESIONS ON OESTROUS BEHAVIOUR IN THE DEERMOUSE
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Summary.
Lesions were placed bilaterally in the medial and basolateral amygdaloid nuclei of adult female deermice (P. m. bairdii) by means of a Radio Frequency Lesion Maker with a current of 20 μA/30 sec. It was found that females with lesions in the basolateral amygdaloid nucleus exhibited normal cyclic vaginal smears and mating activities. However, 30% of the females exhibited hypersexuality as evaluated by excessive mating and reception of the male during dioestrus. Females with lesions in the medial amygdaloid nucleus exhibited normal oestrous cyclic activity, but did not mate during the entire 30-day period of the experiment. It is concluded that the medial amygdaloid nucleus may be involved in the nervous mechanism of normal mating.
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