在人类的额叶和叶中,语音的并行编码
Patrick W Hullett1,2, Matthew K Leonard2,3, Maria Luisa Gorno-Tempini1,2
1Department of Neurology, University of California, San Francisco, San Francisco, CA, USA.
Nature communications
|December 29, 2025
概括
这项研究揭示了直接的,远程的平行通路,从丘脑和主要听觉皮层到人类语音网络中的前额叶. 这些发现挑战了等级模型,显示了早期的额叶参与语音处理.
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
- 语音感知 语音感知
背景情况:
- 目前的语音感知模型提出了一条从听觉区域到额叶的层次途径.
- 目前尚不清楚,正面语音活动是否仅仅来自这个层次结构,还是涉及来自较低层次听觉区域的并行途径.
研究的目的:
- 调查从低层听觉区域 (大脑,主要听觉皮层) 到额叶的直接,远程并行连接的存在.
- 评估前额叶皮质中语音唤起的活动的性质及其与早期听觉处理的关系.
主要方法:
- 利用高密度的直接皮质记录来捕捉神经活动.
- 采用高分辨率的扩散路谱绘图来绘制白质连接.
- 应用了血液动力学功能连接性分析来评估功能关系.
主要成果:
- 额叶神经群体表现出与早期上旋 (STG) 活动同步的语音唤起反应.
- 额叶中的光谱时空语音内容编码与STG中的内容无法区分.
- 白质谱图和功能连接数据表明,体和主要听觉皮层与前额叶有直接联系.
结论:
- 这些发现支持从低层听觉区域到额叶的强大,远程并行输入的存在.
- 这表明人类语音网络的架构比以前建模的更复杂.
- 这些并行通道可能在快速语音处理中起着重要作用.
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