在灵长类的听觉皮层中监测语音错误
Steven J Eliades1, Joji Tsunada2,3
1Department of Head and Neck Surgery & Communication Sciences, Duke University School of Medicine, Durham, North Carolina 27710 steven.eliades@duke.edu.
概括
科学家们在听觉皮质中发现了神经活动,该皮质监测声乐错误. 这个大脑区域跟踪声回应与预测有多大不同,有助于声控.
科学领域:
- 神经科学是一个神经科学.
- 听觉神经科学 听觉神经科学
- 发动机控制器 发动机控制器
背景情况:
- 感官运动控制依赖于整合和监控行为反.
- 自我监测包括将预测的感官后果与实际反进行比较,生成错误信号.
- 虽然建议用于语音,但在听觉皮层中对语音错误信号的直接证据有限.
研究的目的:
- 为了调查在听觉皮层中存在的声音错误信号的存在和性质.
- 为了确定听觉皮层活动是否反映了语音反错误.
- 探索在发声过程中听觉反处理背后的神经机制.
主要方法:
- 在发声过程中记录了非人类灵长类动物听觉皮层的神经活动.
- 通过使用频率转移引入实时听觉反错误.
- 分析了与反错误的大小和方向相关的神经反应.
主要成果:
- 发现神经活动与语音反错误的大小进行缩放.
- 观察到的反灵敏度超过被动感官反应,并且特定于语音频率.
- 证明反反应预测了随后的声音调整.
- 识别了语音错误信号的单元级和人口级编码.
结论:
- 听觉皮层编码语音反错误的大小和方向.
- 语音错误监测的神经机制存在于个体神经元和人群层面.
- 这些发现提供了听觉皮层参与实时语音反依赖控制的证据.
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