在年轻和老年人视觉空间序列记忆期间与事件相关的和波段振荡动态
Makenna B McGill1, Paul D Kieffaber1
1Department of Psychological Sciences, College of William & Mary, Williamsburg, Virginia, United States of America.
PloS one
|April 2, 2024
概括
玛和塔频段的神经振荡支持视觉空间工作记忆 (VSWM) 编码和回忆. 这些过程,特别是编码期间的马波段动态和回忆期间的达-马相振幅合,似乎在健康的认知衰老中得到了保留.
科学领域:
- 认知神经科学 认知神经科学
- 神经科学是一个神经科学.
- 心理学 心理学 心理学
背景情况:
- 视觉空间工作记忆 (VSWM) 对于日常任务至关重要.
- 神经振荡,特别是泰达和马波段,与VSWM有关.
- 以前的研究主要集中在记忆保留期间的神经活动上,而不是编码或检索.
研究的目的:
- 为了调查theta和gamma振荡是否反映了VSWM中的序列编码.
- 为了检查序列回忆和神经振荡之间的关系.
- 探索这些神经过程如何在健康的认知衰老中发生变化.
主要方法:
- 使用计算机空间跨度任务来评估VSWM序列编码和回忆.
- 分析了电脑电图 (EEG) 数据,专注于和马波段振荡.
- 在和米波段之间研究了相振幅合 (PAC).
主要成果:
- 在编码过程中,随着序列长度的增加,对中线前后部位的马带功率增加,这表明老年人保留了VSWM编码.
- 在召回过程中,theta-gamma相振幅合 (PAC) 随着串行位置的增加而增加,这表明它在VSWM检索中的作用.
- 年长的成年人在回忆过程中表现出额头太功率下降,但在回忆过程中保持了马编码和马PAC.
结论:
- 编码过程中的马带动态和检索过程中的马PAC是支持VSWM的不同的机制.
- 这些VSWM背后的特定神经过程似乎对健康的认知衰老具有弹性.
- 这些发现强调了振荡动态的重要性,不仅仅是对VSWM函数的保留.
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