感知可塑性的神经关联在听觉中脑和thalamus中的感知可塑性
Rose Ying1,2,3, Daniel J Stolzberg2, Melissa L Caras1,2,3,4
1Neuroscience and Cognitive Science Program, University of Maryland, College Park, Maryland 20742 roseying@umd.edu mcaras@umd.edu.
概括
这项研究揭示了皮质下听觉区域,包括下 (ICC) 和中间生殖细胞核 (MGV),适应以改善声音检测. 这些大脑区域在快速的上下文变化和缓慢的感知学习方面都表现出增强的灵敏度.
科学领域:
- 神经科学是一个神经科学.
- 听觉感知是一种听觉感知.
- 感官处理 感官处理
背景情况:
- 听觉涉及到对声音特征和行为相关性的复杂处理.
- 听觉皮层可塑性是众所周知的,但听觉感知下皮层贡献的理解较少.
- 声音检测的适应性变化随着上下文的转变而迅速发生,或随着实践而缓慢发生.
研究的目的:
- 调查皮层下听觉区域,特别是下侧结核 (ICC) 和腹部中间生殖细胞核 (MGV) 在感知可塑性中的作用.
- 为了比较在主动声检测和被动暴露期间的ICC和MGV的神经敏感性变化.
- 检查感知学习如何影响这些皮层下听力区域的声音处理.
主要方法:
- 在蒙古鹿中记录了ICC和MGV的单单和多单元活动.
- 利用振幅调制 (AM) 检测任务和被动声音暴露.
- 应用了一个信号检测框架来估计神经测量灵敏度,并分析发射速度和相锁定.
主要成果:
- 在ICC和MGV中,神经值在主动AM检测任务的执行过程中得到改善.
- 神经值的改善主要是由于火速的变化,而不是相锁定.
- 多天的感知训练导致了ICC和MGV的神经测量值的改善.
- 随着MGV的感知训练,AM敏感性的上下文依赖的增强增加了,但不是ICC.
结论:
- 听觉中脑 (ICC) 和丘脑 (MGV) 有助于听觉感知可塑性.
- 这些皮层下区域在快速 (上下文) 和缓慢 (学习) 时间尺度上表现出声音处理的适应性变化.
- 研究结果表明,皮质下听觉结构在塑造听觉感知和适应不断变化的声环境方面发挥着重要作用.
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