感知意识的早期电生理学相关者受到外源和内源注意力的影响
Łucja Doradzińska1, Michał Bola2
1Nencki Institute of Experimental Biology of Polish Academy of Sciences, Warsaw, Poland.
Journal of cognitive neuroscience
|April 5, 2024
概括
视觉意识消极性 (VAN) 不独立于注意力. 这是一个早期的ERP组件.
科学领域:
- 认知神经科学 认知神经科学
- 心理学 心理学 心理学
- 电子生理学 电子生理学
背景情况:
- 视觉意识消极性 (VAN) 是早期脑电图 (EEG) 事件相关潜力 (ERP) 的一个组成部分.
- 建议VAN作为视觉意识的神经相关物,独立于注意力.
- 注意力在VAN生成中的确切作用仍在争论中.
研究的目的:
- 调查VAN是否是现象意识的特定标志物或反映了注意力参与.
- 重新分析现有的EEG数据,操纵刺激意识,突出性和任务相关性.
主要方法:
- 重新分析了41名参与者的EEG数据.
- 视觉刺激意识 (面具/无面具),突出性 (恐惧/中立面孔) 和任务相关性 (目标/分散注意力) 的正角操纵.
- 单次试验ERP分析侧重于早期 (140-200 ms) 和晚期 (200-350 ms) 的时间窗口.
主要成果:
- 早期时间窗口中的VAN高度依赖于注意力操纵;对于注意力无关的刺激,没有发现意识效应.
- 在较晚的时间窗口中,与中性和与任务无关的面孔相比,恐惧和与任务相关的面孔的VAN振幅更高.
- VAN振幅受到外源性 (刺激突出性) 和内源性注意力 (任务要求) 的显著影响.
结论:
- 这些发现表明,VAN振幅受到注意力的强烈调节.
- 这些结果挑战了VAN作为现象意识的注意力独立神经相关的概念.
- VAN可能反映了意识和注意力过程之间的相互作用.
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