语音外跟踪响应的线性相位属性在赫斯克环和上环中
Yaoyao Wang1, Dengchang Wu2, Nai Ding3
1Research Center for Intelligent Computing Infrastructure Innovation, Zhejiang Lab, Hangzhou, 311121, China.
概括
大脑通过唤起响应假设跟踪语音信封,而不是重置相位. 这种跟踪在听觉皮层区域 (如Heschl's gyrus) 中观察到,显示出线性相性质.
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.
- 语音处理 语音处理
背景情况:
- 关于大脑在听力过程中跟踪语音信封的机制仍在争论中.
- 存在两个假设:相位重置和唤起响应.
- 最近的证据支持唤起反应假设,但皮质区域仍然未确定.
研究的目的:
- 识别支持语音信封跟踪唤起响应假设的皮层区域.
- 为了研究神经对不同频率的语音信封反应的线性相性质.
主要方法:
- 立体电脑电图 (SEEG) 用于记录19名患者的皮质活动.
- 患者倾听自然语音刺激.
- 语音外和神经活动之间的相位延迟在不同频率上进行了分析.
主要成果:
- 低频率 (0.5-40 Hz) 语音信封跟踪的线性相特性在赫斯尔环 (HG) 和上环 (STG) 中普遍存在.
- 这种特性也被观察到,虽然不那么频繁,在岛屿,后中心和前中心旋转.
- 响应延迟显示HG沿线的梯度增加,以及STG的后向前梯度增加.
结论:
- 听觉皮层,特别是HG和STG,跟踪与唤起的响应假设一致的语音包裹.
- 这些发现支持在特定皮层区域处理语音信封信息的线性神经机制.
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