转换了视觉工作记忆表现在人类的 Occipitotemporal 和 Posterior Parietal 皮层.
1Department of Psychology, Yale University, New Haven, Connecticut 06510 yaoda.xu@yale.edu.
eNeuro
|June 5, 2025
概括
人类大脑中的视觉工作记忆 (VWM) 代表在感知和VWM之间被转换,而不是共享. 这挑战了VWM的感官解释,表明任务驱动的转变是关键.
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.
- 人类大脑功能 人类大脑功能
背景情况:
- 最近的fMRI研究表明,在早期视觉皮层 (EVC) 中,知觉和视觉工作记忆 (VWM) 之间的表征发生了变化.
- 这与VWM的传统感官解释形成鲜明对比,VWM假定基于交叉解码的共享表示.
- 以前的不一致性归因于实验任务差异,而不是固有的表示区别.
研究的目的:
- 在等同的感知和VWM任务中,在VWM延迟期间直接比较目标和干扰器表示.
- 为了调查感知和VWM的表示是否在人类大脑中共享或转换,特别是在皮皮层 (OTC) 和后壁皮层 (PPC).
主要方法:
- 在人类参与者 (两性) 中利用功能磁共振成像 (fMRI).
- 采用任务设计等同感知和VWM任务条件来比较目标和分散注意力的表示.
- 应用交叉解码分析对来自OTC (包括EVC) 和PPC的fMRI数据.
主要成果:
- 在OTC和PPC中,分心器 (感知) 和目标 (VWM) 之间发现了显著的表示差异.
- 在目标编码 (感知) 和延迟 (VWM) 阶段之间也观察到差异.
- 与OTC相比,PPC的目标代表性更不变,这表明代表性稳定性的区域差异.
结论:
- 这些发现与VWM的感官描述相矛盾,支持任务驱动的转换表示模型.
- 由任务目标和PPC等关联领域影响的转换表示,更好地解释了VWM的功能.
- 这一修订后的理解对于理解人类大脑中的VWM表示,包括EVC,至关重要.
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