"什么"和"什么时候"预测共同调节语音处理
Ryszard Auksztulewicz1,2, Ozan Bahattin Ödül3, Saskia Helbling4
1Department of Neuropsychology and Psychopharmacology, Maastricht University, Maastricht 6229 ER, The Netherlands ryszard.auksztulewicz@maastrichtuniversity.nl.
概括
大脑在层次上整合了"什么"和"什么时候"的语音预测. 时间规律调节内容不匹配响应,较慢的时间尺度影响更大的单元,如单词,这表明共享的神经网络的这种整合.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 审计处理 审计处理
背景情况:
- 适应性行为依赖于预测环境规律,包括刺激内容 ("什么") 和时间 ("什么时候").
- 语音处理涉及在多个层面的内容 (音节,单词) 和时间 (快速,缓慢的尺度) 上进行层次预测.
- 这些内容和时间层次之间的神经映射仍然不清楚.
研究的目的:
- 研究语音中的等级"什么"和"什么时候"预测如何在大脑中相互作用.
- 为了确定不同的神经层次是否处理不同语音单元 (音节与单词) 的交互.
- 探索"什么""什么时候"的整合是否依赖于特定感官或通用机制.
主要方法:
- 磁脑电图 (MEG) 在22名健康志愿者中记录了神经活动.
- 操纵"什么" (音节,伪词) 和"什么时候" (快速,缓慢的时间规律) 规律.
- 分析神经对偏差刺激的反应和有效的连接.
主要成果:
- "什么时候"规律调节"什么"不匹配的响应与等级特异性.
- 偏差的伪词响应被较慢的时间规律放大,而音节响应则受到较快的规律的影响.
- 互动效应局部化到共享的额頭和皮皮层区域,表明分布式处理.
结论:
- 大脑整合了"什么"和"什么时候"的语音预测,当它们在层次上一致时.
- 这种整合是由一个共享的,分布的皮质网络介导的,而不是独特的特定感官层次结构.
- 结果表明,在听觉处理中整合时间和基于内容的预测的统一机制.
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