传播的皮质波协调了人类大脑中的感官编码和记忆检索
bioRxiv : the preprint server for biology
|July 9, 2024
概括
人类大脑每隔几秒钟就会在外部感官处理和内部记忆检索之间切换. 通过fMRI观察到的这种大脑状态切换对于记忆编码和检索等认知功能至关重要.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 人类大脑成像技术
背景情况:
- 复杂的行为需要平衡外部感官输入与内部学习信息.
- 以前对小鼠的研究表明,大脑每隔几秒钟就会在外向和内向认知模式之间交替,由神经元尖端级联标志着.
研究的目的:
- 为了调查类似的大脑切换机制是否控制人类大脑的运行.
- 分析大型fMRI数据集以确定与认知状态相关的大脑活动模式.
主要方法:
- 对人类大型功能磁共振成像 (fMRI) 数据集的分析.
- 对连贯,传播的大脑活动波的观察.
- 同时测量人类在视觉记忆任务中的表现.
- 监测瞳孔大小波动的情况.
主要成果:
- 人类大脑活动表现出连贯的,每隔几秒传播波,从传感器到默认模式网络区域过渡.
- 这些脑电波与瞳孔大小波动一致,表明与兴奋有联系.
- 每个波周期在视觉任务期间顺序地促进了语义信息编码和记忆检索.
- 这种切换现象发生在不同的行为状态中.
结论:
- 人类的认知表现是由外部 (外感) 和内部 (内感) 大脑状态之间的自主切换机制调节的.
- 这种大脑切换是一种保存的哺乳动物生理特征,对于整合日常行为中的感觉和记忆信息至关重要.
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