隐藏的神经状态是鸟歌曲语法的基础
Yarden Cohen1, Jun Shen2, Dawit Semu3
1Department of Biology, Boston University, Boston, MA, USA. ycohen1@mgh.harvard.edu.
Nature
|June 20, 2020
概括
研究人员在鸟中发现了记住过去歌曲元素的神经元, 这些发现揭示了神经
科学领域:
- 神经科学
- 动物的行为
- 生物声学
背景情况:
- 复杂的发音,比如人类的语言和鸟儿的歌声, 都有语法规则.
- 鸟的歌曲表现出长距离的依赖性,其中的短语选择取决于过去的歌曲结构.
- 这些远程语法规则背后的神经机制在很大程度上是未知的.
研究的目的:
- 调查神经基质负责编码长距离的连续依赖在鸟歌曲.
- 确定与歌曲语法相关的特定神经元及其活动模式.
主要方法:
- 使用微型头部显微镜记录鸟前运动核中的神经活动.
- 使用特定细胞类型的遗传工具进行有针对性的神经观察.
- 分析神经活动在探索各种短语序列在鸟的剧目.
主要成果:
- 在HVC中识别了神经元, 编码过去的歌曲转换,
- 这些神经元优先编码过去的行为而不是未来的行为.
- 观察到这些神经元反映了多个歌曲历史,并在历史依赖的过渡期间活跃.
结论:
- 在HVC中的动态涉及"隐藏状态",
- 这些发现表明,在语音学习中,由远程规则控制语法转换的神经基质.
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