Eskes G A
Brain Res. 1984 Feb 13;293(1):127-41. doi: 10.1016/0006-8993(84)91460-4.
Circadian and neural mechanisms important for the organization of reproductive behavior in the male golden hamster were examined. The sexual behavior of male hamsters exhibits diel variations; males are quicker to initiate copulation and to ejaculate in the dark phase than in the light phase of a daily light-dark cycle. The copulatory rhythm is endogenously generated and persists under constant environmental conditions. Destruction of the suprachiasmatic nuclei (SCN) eliminated the normal diurnal rhythm of sexual behavior without affecting copulation per se. In contrast to SCN lesion effects, damage to the medial preoptic area (MPOA) reduced or eliminated copulation; in those MPOA-ablated animals that continued to copulate, the circadian modulation of sexual behavior remained intact.
研究了对雄性金黄地鼠生殖行为组织至关重要的昼夜节律和神经机制。雄性仓鼠的性行为表现出昼夜变化；在每日明暗循环中，雄性仓鼠在黑暗阶段比在光照阶段更快开始交配和射精。交配节律是内源性产生的，并在恒定的环境条件下持续存在。视交叉上核（SCN）的破坏消除了性行为的正常昼夜节律，而不影响交配本身。与SCN损伤的影响相反，内侧视前区（MPOA）的损伤减少或消除了交配行为；在那些继续交配的MPOA切除的动物中，性行为的昼夜调节仍然完好无损。
