The role of the dorsomedial nucleus (DM) of intercollicular complex with regard to sexual difference of distance calls in Bengalese finches
The role of the dorsomedial nucleus (DM) of intercollicular complex with regard to sexual difference of distance calls in Bengalese finches
复制标题
DOI：
10.2108/zsj.17.1231
复制
发表时间：
2000-12-01
影响因子：
0.9
通讯作者：
Aoki, K
中科院分区：
文献类型：
--
作者：
Fukushima, Y;Aoki, K
性成熟的孟加拉雀（Lonchura striata var, Domestica）的远距离叫声的声学结构表现出明显的性别差异。我们进行了一项神经行为学研究，以确定性成熟的雄性和雌性鸟类产生这些声音上不同的距离叫声的大脑神经机制。被称为中脑发声中心的丘间复合体背内侧（DM）核的双侧损伤消除了性成熟男性和女性的远距离叫声，但对男性和女性的DM进行电刺激诱发了表现出性别差异的叫声，并且在听觉上与男性和女性的远距离叫声相似。这些结果证实，两性的 DM 都是控制叫声行为的声音控制系统的核心之一。将神经示踪剂注入 DM 中，以识别 DM 中神经输入和输出连接的性别差异。 DM 的解剖追踪揭示了男性同侧古纹状体 (RA) 坚固核中存在标记的体细胞。然而，在双侧 RA 损伤后，男性发出的远程呼叫在声学上与女性远程呼叫相似。这些结果表明，DM 是产生两性距离呼叫模式的核之一，并且从 RA 到 DM 的神经信息改变了男性的距离呼叫模式。
The acoustic structures of distance calls in sexually mature Bengalese finches (Lonchura striata var, domestica) show distinct sexual differences. We conducted a neuroethological study to identify the neural mechanism in the brain by which sexually mature male and female birds produce these acoustically different distance calls. Bilateral lesions of the dorsomedial (DM) nucleus of the intercollicular complex, known as the midbrain vocal center, eliminated distance calls in sexually mature males and females, but electrical stimulation of the DM in males and females induced calls that showed sexual differences and were acoustically similar to the distance calls of males and females. These results confirm that the DM in both sexes is one of the nuclei of the vocal control system that controls calling behavior. Neural tracer was injected into the DM in order to identify sexual differences in the neural input and output connections in the DM. Anatomical tracing of DM revealed the existence of labeled somata in the ipsilateral robust nucleus of the archistriatum (RA) in males. After bilateral RA lesions, however, males produced distance calls that were acoustically similar to female distance calls. These results suggest that the DM is one of the nuclei which generate the distance call patterns of both sexes, and that the neural information from the RA to the DM change the distance call pattern of male.