ABSTRACT

Items associated with high value are often better remembered. Value may increase attention toward item in context associations. Alpha oscillations (8–13 Hz) are thought to underlie attention and their observation may reveal the role attention plays in value-based memory. In the current study, EEG is used to record brain activity while participants (n = 30) completed a source recognition memory task where items were associated with either high or low value backgrounds to determine whether greater attentional resources are deployed when encoding high value information. Participants demonstrated better memory for objects associated with high value backgrounds. Alpha oscillatory power in occipital/temporal brain regions exhibited greater desynchronization when encoding objects associated with high value that were later successfully recalled compared to those associated with low value. In addition, beta oscillatory power in midfrontal brain regions exhibited greater desynchronization during successful recall of high value objects compared to low value objects. Together these results suggest that more attentional resources are used to encode information that is associated with high value, which increases the likelihood of later successful memory recall.

摘要

与高价值相关的项目通常更容易被记住。价值可能会增加对上下文关联中项目的关注。Alpha 振荡 (8–13 Hz) 被认为是注意力的基础，他们的观察可能揭示注意力在基于价值的记忆中的作用。在当前的研究中，EEG 用于记录大脑活动，而参与者 (n = 30) 完成了一项源识别记忆任务，其中项目与高价值或低价值背景相关联，以确定在编码高价值信息时是否部署了更多的注意力资源。参与者对与高价值背景相关的物体表现出更好的记忆。当编码与高价值相关的对象时，与低价值相关的对象相比，枕叶/颞脑区域的 alpha 振荡功率表现出更大的去同步化，这些对象后来被成功召回。此外，与低价值物体相比，在成功回忆高价值物体的过程中，中额脑区域的 β 振荡功率表现出更大的去同步化。这些结果共同表明，更多的注意力资源用于编码与高价值相关的信息，这增加了以后成功回忆记忆的可能性。