Individual variation in neuron number predicts differences in the propensity for avian vocal imitation.
Individual variation in neuron number predicts differences in the propensity for avian vocal imitation.
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DOI：
10.1073/pnas.95.3.1277
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发表时间：
1998-02
影响因子：
11.1
通讯作者：
B. C. Ward;E. Nordeen;K. Nordeen
中科院分区：
文献类型：
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作者：
B. C. Ward;E. Nordeen;K. Nordeen
鸟类的鸣唱学习包括记忆和再现同种鸣唱材料。在一些物种中，歌曲曲目的大小与两个与歌曲相关的大脑区域的总体积相关，HVc（作为专有名称的首字母缩略词）和原始纹状体（RA）的鲁棒核。我们提出了雄性斑胸草雀与两个成年导师，并发现HVC体积和神经元数量的个体差异呈正相关，导师音节的数量准确复制的差异。这些结果在第二项研究中得到了重复。RA体积和歌曲学习之间的关系是相似的，但不太稳健。重要的是，总剧目的大小（歌曲音节数）并没有显着相关性与解剖措施的HVC或RA。由于先前的研究表明，这些区域的体积和神经元数量不受歌曲学习的调节，因此神经元数量的自然变化可能会限制歌曲材料的复制或再现。
Avian song learning involves memorizing and reproducing song material produced by conspecifics. In several species song repertoire size correlates with the overall volume of two song-related brain regions, the HVc (acronym used as the proper name) and the robust nucleus of the archistriatum (RA). We raised male zebra finches with two adult tutors and found that individual differences in HVc volume and neuron number correlated positively with differences in the number of tutor syllables accurately copied. These results were replicated in a second study. The relationship between RA volume and song learning was similar, but less robust. Importantly, total repertoire size (number of song syllables) did not correlate significantly with anatomical measures of either the HVc or RA. Because previous work suggests that the volume and neuron number of these regions are not regulated by song learning, it is possible that naturally occurring variation in neuron number constrains how much song material can be copied or reproduced.