在主观可见性较低的情况下,对感知整合的前线参与
Jisub Bae1, Koeun Jung2, Oliver James1
1Center for Cognition and Sociality, Institute for Basic Science (IBS), Daejeon, South Korea.
NeuroImage
|December 22, 2024
概括
有意识的感知神经动力学随着意识的变化而改变. 大脑后部区域从动态编码转变为稳定编码,而前部区域显示稳定编码,特别是在可见度低的情况下.
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
- 电子生理学 电子生理学
背景情况:
- 感知整合包括将感官信息结合起来,形成一个连贯的感知.
- 了解意识访问的神经动态对于解释主观经验至关重要.
- 不同大脑区域在处理视觉刺激时的作用与不同程度的意识并未完全理解.
研究的目的:
- 调查感知整合的时空神经动态如何随着有意识的访问而改变.
- 为了检查不同大脑区域从动态到稳定的神经编码的过渡.
- 确定前脑区域在低可见度下处理整合形状信息中的作用.
主要方法:
- 使用脑电图 (EEG) 来记录神经活动.
- 多变量模式分析 (MVPA) 应用于EEG数据.
- 参与者报告了向后蒙面刺激产生的虚幻三角形的方向和主观可见性.
主要成果:
- 大脑后部和中部区域最初使用动态神经代码,随着时间的推移转换为稳定代码.
- 后部区域的动态到稳定的代码过渡发生在稍后,并随着意识访问的减少而消失.
- 前部区域主要使用稳定的神经代码,即使在最小的刺激意识下,神经代码也会持续存在.
结论:
- 感知整合的时空神经动力学根据意识访问的程度不同.
- 前脑区域在处理整合形状信息方面发挥着独特的作用,特别是在主观可见性较低的条件下.
- 这些发现突出了神经编码策略和视觉感知中的意识意识之间的动态相互作用.
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