Small sex differences in song control dendrites are associated with minimal differences in song capacity.
Small sex differences in song control dendrites are associated with minimal differences in song capacity.
复制标题
鸣叫控制树突的微小性别差异与鸣叫能力的最小差异相关。
DOI：
10.1002/neu.480190303
复制
发表时间：
1988
期刊：
影响因子：
--
通讯作者：
Arnold,AP
中科院分区：
文献类型：
--
作者：
DeVoogd,TJ;Brenowitz,EA;Arnold,AP
先前对金丝雀和斑胸草雀的研究表明，n 的树突结构在性别之间存在很大差异。粗壮的古纹状体（RA），参与控制鸣叫的主要核团之一。这种性别差异与雌性普遍或完全缺乏鸣叫有关。如果 RA 的树突形态与鸣叫能力存在因果关系，那么在两性鸣叫的鸟类中不应出现结构上的巨大性别差异。我们现在报告这一预测在浅胸鹪鹩（Thryothorus leucotis）中得到了证实，在这种鹪鹩中，繁殖对的成员会互相唱二重唱。 RA 中的总树突长度和树突分支数量在该物种中没有差异。雄性的树突比雌性的树突距细胞体远约 8 μm，这显然是因为细胞体附近的树突片段较长。我们认为这表明对 RA 结构的不同影响发生在鹪鹩生命的早期。
Previous work on canaries and zebra finches has shown that large differences between the sexes exist in the structure of dendrites in n. robustus archistriatalis (RA), one of the principal nuclei involved in the control of song. This sex difference is associated with a general or complete absence of song in females. If dendritic morphology in RA is causally related to capacity for song, large sex differences in structure should not occur in avian species in which both sexes sing. We now report this prediction confirmed for buff‐breasted wrens (Thryothorus leucotis), a species in which the members of a breeding pair sing duets with each other. Total dendritic length and number of dendritic branches in RA do not differ in this species. Dendrites from males project about 8 μm further from the cell body than dendrites from females, apparently because of longer dendritic segments near the cell body. We argue that this suggests that differential influences on the structure of RA occurred early in the lives of the wrens.