A default mode network subsystem supports both item and associative word encoding: Insights from a meta-analysis

A collection of 3 brain maps. Each brain map is a 3D array of values representing properties of the brain at different locations.

### Collection description

<p>Recent meta-analytic evidence has underscored the significant role of the default mode network (DMN) in facilitating item word encoding. This study builds on this finding through a comprehensive meta-analysis of fMRI-based subsequent memory studies that use words as stimuli. The results highlight several key functions within the DMN. Firstly, the dorsomedial prefrontal cortex (dmPFC) subsystem of the DMN plays a pivotal role in enhancing successful word encoding, suggesting its vital involvement in the semantic processing of incoming verbal information. Secondly, the utility of the dmPFC subsystem extends beyond item word encoding to associative word encoding tasks, demonstrating its broad applicability in verbal information encoding. Thirdly, regions within the left inferior frontal cortex, a core component of the dmPFC subsystem, show increased activity during associative compared to item word encoding, emphasizing their role in integrating verbal information with contextual details. Contrary to previous research that linked the DMN with encoding interference—often attributed to the core subsystem&#x27;s tendency for mind-wandering—this study highlights the facilitative role of the dmPFC subsystem in memory encoding. The contrasting roles of the DMN subsystems, both interfering and facilitating, challenge traditional views and advocate for a more nuanced understanding of the network&#x27;s role in memory encoding.</p>

一组包含三张脑图的数据集。每一张脑图均以三维数组的形式呈现，其数值代表了大脑在不同位置的属性。

### 集合描述

近期元分析证据强调了默认模式网络（DMN）在促进项目词语编码方面的关键作用。本研究在此基础上，通过综合元分析基于fMRI后续记忆研究的结果，这些研究以词语为刺激物。研究结果突出了DMN内部的几个关键功能。首先，DMN的背内侧前额叶皮层（dmPFC）子系统在增强成功的词语编码中扮演着核心角色，表明其在接收到的口头信息语义处理中的不可或缺性。其次，dmPFC子系统的效用不仅限于项目词语编码，还扩展到了关联词语编码任务，展示了其在口头信息编码中的广泛应用。第三，dmPFC子系统核心组成部分之一的左侧下额叶皮层区域在关联词语编码期间相较于项目词语编码显示出更高的活动性，强调了其在将口头信息与语境细节整合中的作用。与将DMN与编码干扰联系起来的先前研究——这种干扰通常归因于核心子系统的分心倾向——相反，本研究突出了dmPFC子系统在记忆编码中的促进作用。DMN子系统在干扰和促进作用中的对比角色挑战了传统观点，并倡导对网络在记忆编码中的角色有一个更为细致的理解。”
}