The possible involvement of the nonstrial pathway of the amygdala in neural control of sexual behavior in male rats.
The effect of medial amygdala lesions on male sexual behavior in male rats with stria terminalis cut was examined. First, castrated male rats received bilateral transections of the stria terminals (STC) or sham cut (SC). Most STC males showed no ejaculation, but displayed mount and intromission, although the frequencies were not high compared to those of males with SC. Next, bilateral lesions of the medial amygdala (MAL) or sham lesion (SL) were performed in males with STC or SC. The MAL caused severe loss of all aspects of copulatory behavior in males with STC as well as in males with SC. The suppressive effect of the MAL on copulatory activity was stronger than that of the STC. These results indicate that a neural pathway other than the stria terminalis is involved in the regulation of male sexual behavior by the amydgala in male rats.
Kondo
Y
Y
Department of Basic Human Sciences, School of Human Sciences, Waseda University, Saitama, Japan.
Yamanouchi
K
K
D000679:Amygdala / Q000033:anatomy & histology / Q000502:physiology*; D000818:Animals; D002552:Cerebral Ventricles / Q000033:anatomy & histology / Q000502:physiology; D003307:Copulation / Q000187:drug effects / Q000502:physiology; D004542:Ejaculation / Q000187:drug effects / Q000502:physiology; D008297:Male; D009434:Neural Pathways / Q000033:anatomy & histology / Q000502:physiology; D009919:Orchiectomy; D011301:Preoptic Area / Q000033:anatomy & histology / Q000502:physiology; D051381:Rats; D017208:Rats, Wistar; D012726:Sexual Behavior, Animal / Q000502:physiology*; D013739:Testosterone / Q000494:pharmacology
D013739:Testosterone