感知和误解语音:在上叶的词汇和子词汇处理
Valeriya Tolkacheva1, Sonia L E Brownsett2,3, Katie L McMahon4,5
1Queensland University of Technology, School of Psychology and Counselling, O Block, Kelvin Grove, Queensland, 4059, Australia.
Cerebral cortex (New York, N.Y. : 1991)
|March 17, 2024
概括
预先的知识有助于杂的语音感知,但可能导致错误. 抑制左侧后部上时 (pSTG) 干扰了真正的句子初始化,而右侧的pSTG刺激增强了对退化语音的误解.
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:
- 听众使用预测处理来处理杂的语音,利用先前的知识来提高理解力.
- 这种预测机制虽然有益,但也可能导致语音误解.
- 语音感知和错误感知的特定神经支仍然不完全理解.
研究的目的:
- 调查左侧和右侧后部上部旋 (pSTG) 在退化语音的感知和错误感知中的因果作用.
- 在处理清晰与扭曲的听觉信息时区分左侧和右侧pSTG的功能.
- 检查针对性神经刺激对预测性语音处理的影响.
主要方法:
- 采用了一种主要探头范式,使用光谱时退化的听觉刺激.
- 利用跨磁刺激 (TMS) 抑制左侧和右侧pSTG的活动,以及控制顶部部位.
- 通过同声无词转换创建伪句子,以引起误解.
主要成果:
- 在左侧的pSTG上抑制的TMS选择性地损害了对真实句子的原始化,但不是对伪句子 (误解).
- 右侧的抑制TMS增强了伪句子 (误解) 的启动,但没有影响真实句子的感知.
- 这些发现揭示了左侧和右侧pSTG在语音处理下降中的不同,不对称的因果作用.
结论:
- 左侧的pSTG因果关系地参与了对语音退化的准确感知,特别是在语言连贯的刺激方面.
- 右侧的pSTG在错误感知退化语音方面发挥着明显的因果作用,可能是通过下层语言处理.
- 结果支持语言处理的双边模型,突出显示后上旋内的功能专业化.
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