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解码神经模式,以处理不同视觉意识条件下的恐惧面孔:多变量模式分析.
Zeguo Qiu1, Xuqian Li2, Alan J Pegna1
1School of Psychology, The University of Queensland, Brisbane, Queensland, Australia.
Psychophysiology
|June 16, 2023
概括
恐惧的面孔被无意识地处理,即使视觉意识有限. 然而,确定它们的空间位置需要有意识的感知和任务相关性.
科学领域:
- 认知神经科学 认知神经科学
- 视觉感知 视觉感知 视觉感知
- 神经成像是一种神经成像.
背景情况:
- 之前关于无意识处理恐惧面部的研究产生了不一致的结果.
- 了解视觉意识背后的神经机制至关重要.
研究的目的:
- 通过脑电图 (EEG) 和多变量模式分析 (MVPA) 来研究恐惧面孔的无意识处理.
- 确定处理恐惧面孔及其空间位置的条件,有或没有视觉意识.
主要方法:
- 采用了反向掩盖实验,使用不同的面部呈现时间 (16 ms vs. 266 ms).
- 利用EEG记录神经活动和MVPA解码视觉意识,面部存在和空间位置.
- 参与者完成任务时,面孔要么与任务相关,要么与任务无关.
主要成果:
- 面部的视觉识别在特定时间窗口 (158-168毫秒,235-260毫秒,400-600毫秒) 中是可解码的.
- 恐惧面孔的空间位置只有当面孔被意识地感知并与任务相关时才能解码.
- 不同的神经模式可用于可怕的面孔 - 现在的条件是可解码的,无论介绍的持续时间或意识.
结论:
- 仅仅是恐惧的面孔的存在的无意识处理,即使视觉意识受到限制,也会发生.
- 有意识的意识和任务相关性是处理可怕面孔的空间位置所必需的.
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