Suppr超能文献

白腰文鸟(Lonchura striata var. domestica)端脑鸣唱控制回路中的性别差异。

Sex differences in the telencephalic song control circuitry in Bengalese finches (Lonchura striata var. domestica).

作者信息

Tobari Yasko, Nakamura Koji Z, Okanoya Kazuo

机构信息

Gruduate School of Science and Technology, Chiba University, Japan.

出版信息

Zoolog Sci. 2005 Oct;22(10):1089-94. doi: 10.2108/zsj.22.1089.

Abstract

Bengalese finches, Lonchura striata, are extremely sexually dimorphic in their singing behavior; males sing complex songs, whereas females do not sing at all. This study describes the developmental differentiation of the brain song system in Bengalese finches. Nissl staining was used to measure the volumes of four telencephalic song nuclei: Area X, HVC, the robust nucleus of the arcopallium (RA), and the lateral portion of the magnocellular nucleus of the anterior nidopallium (LMAN). In juveniles (circa 35 days old), Area X and the HVC were well developed in males, while they were absent or not discernable in females. The RA was much larger in males but barely discernable in females. In males, the volumes of Area X and the RA increased further into adulthood, but that of the HVC remained unchanged. The LMAN volume was greater in juveniles than in adults, and there was no difference in the LMAN volume between the sexes. The overall tendency was similar to that described in zebra finches, except for the volume of the RA, where the degree of sexual dimorphism is larger and the timing of differentiation occurs earlier in Bengalese finches. Motor learning of the song continues until day 90 in zebra finches, but up to day 120 in Bengalese finches. Earlier neural differentiation and a longer learning period in Bengalese finches compared with zebra finches may be related to the more elaborate song structures of Bengalese finches.

摘要

白腰文鸟(Lonchura striata)在鸣叫行为上具有极其显著的两性差异;雄性会唱复杂的歌曲,而雌性则完全不会唱歌。本研究描述了白腰文鸟大脑鸣叫系统的发育分化情况。使用尼氏染色法测量四个端脑鸣叫核团的体积:X区、HVC、弓状皮质粗核(RA)以及前巢皮质大细胞核外侧部(LMAN)。在幼鸟(约35日龄)中,雄性的X区和HVC发育良好,而雌性则没有或难以辨别。雄性的RA要大得多,而雌性则几乎难以辨别。在雄性中,X区和RA的体积在成年后进一步增大,但HVC的体积保持不变。LMAN的体积在幼鸟中比成年鸟大,且两性之间LMAN的体积没有差异。总体趋势与斑胸草雀中描述的相似,除了RA的体积,在白腰文鸟中两性差异程度更大且分化时间更早。在斑胸草雀中,鸣叫的运动学习持续到第90天,但在白腰文鸟中则持续到第120天。与斑胸草雀相比,白腰文鸟更早的神经分化和更长的学习期可能与白腰文鸟更复杂的鸣叫结构有关。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验