一个专门的前脑电路用于幼儿歌鸟的声乐语
Dmitriy Aronov1, Aaron S Andalman, Michale S Fee
1McGovern Institute for Brain Research, Department of Brain and Cognitive Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
概括
年轻的歌鸟使用一个独特的神经电路,需要LMAN (阴的侧面巨细胞核),但不需要HVC (高声中心). 这与成人唱歌电路不同,表明发育运动系统的一般原则.
科学领域:
- 神经科学是一个神经科学.
- 发育生物学 发展生物学
- 动物行为 动物行为
背景情况:
- 年轻动物表现出对神经发育和运动控制至关重要的探索性行为.
- 这些早期行为的神经支柱在很大程度上仍然没有被描述.
- 年轻的歌鸟产生"下声",一种类似于喋喋不休的原始发音.
研究的目的:
- 为了研究幼歌鸟中下声产生的神经基础.
- 为了确定大脑区域对于青少年的声音语至关重要.
- 为了比较青少年下唱的神经回路与成年人的歌曲制作.
主要方法:
- 在子歌生产过程中,幼斑马的电生理学记录.
- 针对特定大脑区域 (HVC,LMAN) 的损伤研究或药理失活.
- 在发音过程中对LMAN和HVC的神经活动的分析.
主要成果:
- 年轻斑马的子声产生不依赖于HVC (高声中心).
- 副歌的产生需要LMAN (尼多帕的侧面巨细胞核),这是一个参与声乐学习的区域.
- 在LMAN中的神经元显示出在下声中与声输出的前运动相关性.
- 青少年下唱的神经回路与成人唱歌的回路不同.
结论:
- 青少年的声音语是由一个神经回路控制的,与管理成人歌唱的不同.
- LMAN在青少年声乐生产中起着至关重要的作用,突出其在声乐学习中的作用.
- 青少年和成人运动控制电路的这种分离可能是开发系统的一般原则.
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