Local and interareal alpha and low-beta band oscillation dynamics underlie the bilateral field advantage in visual working memory.

IF 2.9 2区医学 Q2 NEUROSCIENCES

Cerebral cortex Pub Date : 2024-11-05 DOI:10.1093/cercor/bhae448

Judith Sattelberger, Hamed Haque, Joonas J Juvonen, Felix Siebenhühner, Jaakko Matias Palva, Satu Palva

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引用次数: 0

Abstract

Visual working memory has a limited maximum capacity, which can be larger if stimuli are presented bilaterally vs. unilaterally. However, the neuronal mechanisms underlying this bilateral field advantage are not known. Visual working memory capacity is predicted by oscillatory delay-period activity, specifically, by a decrease in alpha (8 to 12 Hz) band amplitudes in posterior brain regions reflecting attentional deployment and related shifts in excitation, as well as a concurrent increase of prefrontal oscillation amplitudes and interareal synchronization in multiple frequencies reflecting active maintenance of information. Here, we asked whether posterior alpha suppression or prefrontal oscillation enhancement explains the bilateral field advantage. We recorded brain activity with high-density electroencephalography, while subjects (n = 26, 14 males) performed a visual working memory task with uni- and bilateral visual stimuli. The bilateral field advantage was associated with early suppression of low-alpha (6 to 10 Hz) and alpha-beta (10 to 17 Hz) band amplitudes, and a subsequent alpha-beta amplitude increase, which, along with a concurrent load-dependent interareal synchronization in the high-alpha band (10 to 15 Hz), correlated with hit rates and reaction times and thus predicted higher maximum capacities in bilateral than unilateral visual working memory. These results demonstrate that the electrophysiological basis of the bilateral field advantage in visual working memory is both in the changes in attentional deployment and enhanced interareal integration.

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局部和区域间阿尔法和低贝塔波段振荡动力学是视觉工作记忆双侧场优势的基础。

视觉工作记忆的最大容量是有限的，如果刺激是双侧呈现而不是单侧呈现，则最大容量会更大。然而，这种双侧视野优势的神经元机制尚不清楚。视觉工作记忆的容量是由振荡延迟期活动预测的，具体来说，是由后部脑区阿尔法（8 到 12 赫兹）波段振幅的降低反映出注意力的调配和相关的兴奋转移，以及前额叶振荡振幅的同时增加和多频率的areal间同步反映出信息的主动维持。在此，我们想知道是后阿尔法抑制还是前额叶振荡增强解释了双侧场域优势。我们用高密度脑电图记录了受试者（n = 26，14 名男性）在进行单侧和双侧视觉刺激的视觉工作记忆任务时的大脑活动。双侧场优势与低α波段（6-10赫兹）和α-β波段（10-17赫兹）振幅的早期抑制以及随后的α-β波段振幅增加有关，这些振幅以及同时出现的高α波段（10-15赫兹）中依赖于负荷的areal间同步与命中率和反应时间相关，因此预测双侧视觉工作记忆的最大能力高于单侧。这些结果表明，视觉工作记忆双侧场优势的电生理学基础在于注意力部署的变化和增强的areal间整合。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Cerebral cortex 医学-神经科学

CiteScore

6.30

自引率

8.10%

发文量

510

审稿时长

2 months

期刊介绍： Cerebral Cortex publishes papers on the development, organization, plasticity, and function of the cerebral cortex, including the hippocampus. Studies with clear relevance to the cerebral cortex, such as the thalamocortical relationship or cortico-subcortical interactions, are also included. The journal is multidisciplinary and covers the large variety of modern neurobiological and neuropsychological techniques, including anatomy, biochemistry, molecular neurobiology, electrophysiology, behavior, artificial intelligence, and theoretical modeling. In addition to research articles, special features such as brief reviews, book reviews, and commentaries are included.