非目标抑制支持在高工作记忆负载下表示优先级的形成
Yaya Zhang1, Gongao Li1, Xuezhu Hu1
1Learning and Cognition Key Laboratory of Beijing, School of Psychology, Capital Normal University, Beijing 100048, China.
Brain sciences
|June 26, 2025
概括
视觉工作记忆 (VWM) 的优先级取决于目标增强,这是稳定的,和非目标抑制,这取决于可用的资源. VWM负载通过改变神经振荡和协调来调节这些机制.
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:
- 视觉工作记忆 (VWM) 中的表示优先级包括目标增强和非目标抑制.
- 对于VWM负载对这些优先级机制的影响尚未完全理解.
研究的目的:
- 调查VWM负载如何调节目标增强和非目标抑制,使用EEG和反向提示范式.
- 检查在低和高VWM负载条件下表示优先级的神经相关性.
主要方法:
- 在低和高VWM负载实验中利用了带有反射信号范式的脑电图 (EEG).
- 分析行为表现,事件相关潜力 (ERP) 和时间频率数据,包括相幅度合 (PAC).
主要成果:
- 在低负载下,目标和非目标项目都受益于反;在高负载下,只有目标项目受益,而非目标项目受损.
- 脑电图数据显示,在负载中有效线索的增强P2和P3b振幅,只有在高负载下出现显著的逆边延迟活动 (CDA).
- 在两种负载下都观察到前端的theta同步和后端的alpha脱同步,在有效线索的低负载下,theta-alphaPAC更强.
结论:
- 目标增强是VWM优先级的一致机制.
- 非目标抑制是资源依赖的,并受到VWM负载的影响.
- 通过调节神经振荡和区域间协调,VWM负载塑造了优先级.
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