Allison J D, Wilczynski W
Department of Psychology, Institute for Neuroscience, University of Texas, Austin.
Brain Behav Evol. 1991;38(6):322-31. doi: 10.1159/000114398.
Iontophoretic injections of horseradish peroxidase (HRP) into either the preoptic area or ventral hypothalamus of the green treefrog, (Hyla cinerea), demonstrated inputs from thalamic and midbrain auditory nuclei. In a pattern similar to that seen in Rana catesbeiana and Rana pipiens, the central thalamic and secondary isthmal nuclei were found to provide heavy input to the ventral hypothalamus. Additionally, a lighter input from the anterior thalamic nucleus was seen. In contrast, the preoptic area receives a major input from the anterior thalamic and secondary isthmal nuclei, and possibly a sparse input from the central thalamic nucleus. These results suggest that in treefrogs multimodal and auditory information may reach the preoptic area and ventral hypothalamus, two regions involved in endocrine regulation and the control of reproductive behavior, via largely separate major pathways from the thalamus combined with a common midbrain input. Furthermore, the ventral hypothalamus receives heavy input from the preoptic area, lateral amygdala, suprachiasmatic nucleus, anterior entopeduncular nucleus, and a lighter input from the striatum. Nonauditory afferents to the preoptic area originate in the medial and lateral septal nuclei, medial pallium, and the dorsal-, lateral-, and ventral hypothalamus. The preoptic area and ventral hypothalamus are reciprocally connected.
将辣根过氧化物酶（HRP）离子电渗注入绿树蛙（Hyla cinerea）的视前区或腹侧下丘脑，结果显示存在来自丘脑和中脑听觉核团的输入。与牛蛙（Rana catesbeiana）和豹蛙（Rana pipiens）中观察到的模式相似，发现中央丘脑核和二级峡核向腹侧下丘脑提供大量输入。此外，还观察到来自丘脑前核的较少量输入。相比之下，视前区主要接收来自丘脑前核和二级峡核的输入，可能还接收来自中央丘脑核的少量输入。这些结果表明，在树蛙中，多模式和听觉信息可能通过丘脑的主要独立通路与共同的中脑输入相结合，到达视前区和腹侧下丘脑，这两个区域参与内分泌调节和生殖行为的控制。此外，腹侧下丘脑接收来自视前区、外侧杏仁核、视交叉上核、前内缰核的大量输入，以及来自纹状体的少量输入。视前区的非听觉传入纤维起源于内侧和外侧隔核、内侧皮层以及背侧、外侧和腹侧下丘脑。视前区和腹侧下丘脑相互连接。
