人类大脑中不变的面部表示的时空空间动态
bioRxiv : the preprint server for biology
|June 12, 2025
概括
大脑迅速提取熟悉的面部身份,在89ms内变得视图不变. 年龄和性别处理是并行的,任务需求影响了面部感知的后期阶段.
科学领域:
- 认知神经科学 认知神经科学
- 神经成像是一种神经成像.
- 人类面部感知 人类面部感知
背景情况:
- 人类大脑高效地识别熟悉的面孔,尽管外表变化.
- 不变面部表示的时空动态和任务依赖性尚未完全理解.
研究的目的:
- 用磁脑图 (MEG) 来描述不变的面部表现的出现.
- 研究面部处理的时间层次和任务调制.
主要方法:
- 多变量解码MEG反应和源定位.
- 熟悉的名人面孔在观点,性别和年龄上有所不同.
- 参与者执行了一项关于身份或形象的单背任务.
主要成果:
- 身份信息迅速出现,视图不变的时间为89ms.
- 年龄和性别信息与视角不变的身份信息并行出现.
- 任务要求调制后期身份和性别表征.
- 尾部和状面部区域显示参与处理.
结论:
- 大脑通过特定的时空动态从熟悉的面孔中提取视图不变的身份.
- 年龄和性别是并行处理的,早期阶段是feedforward.
- 后期的处理阶段受到任务需求的影响,为面部感知计算模型提供了洞察力.
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