记忆引导的感知是由动态的二阶段的和α介导的检索形成的
Manda Fischer1,2,3, Morris Moscovitch2,3, Claude Alain2,3
1The Brain and Mind Institute, University of Western Ontario, London, Ontario, Canada.
Annals of the New York Academy of Sciences
|February 4, 2025
概括
当声音具有预测性时,记忆检索加速了听觉感知. 独特的大脑活动模式,特别是和α功率的变化,揭示了记忆如何引导听觉的两阶段机制.
科学领域:
- 神经科学是一个神经科学.
- 听觉感知是一种听觉感知.
- 认知心理学 认知心理学
背景情况:
- 记忆显著影响知觉,但研究往往忽视了记忆检索的动态性质.
- 以前的研究主要使用静态视觉任务,在理解记忆引导感知方面产生了偏见.
研究的目的:
- 研究记忆对听觉感知的影响背后的神经机制.
- 探索听觉关联性记忆检索的时间动态.
主要方法:
- 使用脑电图 (EEG) 在提示目标听觉范式期间监测大脑活动.
- 参与者 (N=64) 倾听了对目标音调的预测或非预测的音景.
主要成果:
- 更快的目标检测发生在预测声景中,证明了记忆引导的感知效益.
- 在早期 (950毫秒) 和晚期 (1650毫秒) 的时间点观察到明显的和α功率变化,区分预测和非预测上下文.
- 左前叶早期的theta活动与感知效益相关.
结论:
- 在关联性记忆检索过程中,不同的神经过程在不同的时间点运行.
- 一个两阶段的检索机制,对时间线索敏感,解释了记忆如何影响听觉感知.
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