Allison J D
Department of Psychology, University of Texas, Austin 78712.
J Comp Physiol A. 1992 Oct;171(3):387-95. doi: 10.1007/BF00223968.
Responses of neurons in the preoptic area and ventral hypothalamus to conspecific mating calls or white noise bursts were examined in male green treefrogs (Hyla cinerea) during different seasons. In the winter, 34.3% of preoptic neurons and 46.7% of ventral hypothalamic cells demonstrated significant changes in activity level during presentation of a conspecific mating call. In contrast, only 13.3% of preoptic units and 16.7% of ventral hypothalamic cells responded to the white noise. The percentage of preoptic and hypothalamic units responding to the advertisement call did not differ significantly during the summer breeding season. Type I units exhibited a dramatic increase in activity during acoustic stimulation followed by a rapid return to baseline activity levels after stimulus offset. Type II cells showed a robust activity increase during stimulation, but maintained an intermediate activity level after stimulus offset. In the preoptic area, a third response type exhibited suppressed activity during acoustic stimulation. Although seasonal condition did not alter the percentage of acoustically responsive units within either nucleus, the proportion of Type I units in the ventral hypothalamus was greatest during the summer.
在不同季节对雄性绿树蛙（灰树蛙）视前区和下丘脑腹侧的神经元对同种交配叫声或白噪声猝发的反应进行了研究。在冬季，34.3%的视前神经元和46.7%的下丘脑腹侧细胞在呈现同种交配叫声时活动水平有显著变化。相比之下，只有13.3%的视前单位和16.7%的下丘脑腹侧细胞对白噪声有反应。在夏季繁殖季节，视前区和下丘脑对求偶叫声有反应的单位百分比没有显著差异。I型单位在声音刺激期间活动急剧增加，刺激结束后迅速恢复到基线活动水平。II型细胞在刺激期间活动显著增加，但在刺激结束后保持中等活动水平。在视前区，第三种反应类型在声音刺激期间活动受到抑制。尽管季节条件没有改变任一核团内对声音有反应的单位百分比，但下丘脑腹侧I型单位的比例在夏季最大。
