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Stable maintenance of multiple representational formats in human visual short-term memory

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收录情况： ◇ SCIE ◇ 自然指数

作者：
Liu, J[1,2] * ; Zhang, H[3] * ; Yu, T[4] ; Ni, D[4] ; Ren, L[5] ; Yang, Q[1,2] ; Lu, B[1,2] ; Wang, D[5] ; Heinen, R[3] ; Axmacher, N[1,2,3] ; Xue, G[1,2] ;
机构： [1]State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, 100875 Beijing, China [2]IDG/McGovern Institute for BrainResearch, Beijing Normal University, 100875 Beijing, China [3]Department of Neuropsychology, Institute of Cognitive Neuroscience, Faculty of Psychology,Ruhr University Bochum, 44801 Bochum, Germany [4]Beijing Institute of Functional Neurosurgery, Xuanwu Hospital, Capital Medical University, 100053Beijing, China [5]Comprehensive Epilepsy Center of Beijing, Department of Neurology, Xuanwu Hospital, Capital Medical University, 100053 Beijing,China
出处：
DOI： 10.1073/pnas.2006752117
ISSN：

关键词： Deep neural network Hippocampus Intracranial EEG Representation Visual short-term memory

摘要：
Visual short-term memory (VSTM) enables humans to form a stable and coherent representation of the external world. However, the nature and temporal dynamics of the neural representations in VSTM that support this stability are barely understood. Here we combined human intracranial electroencephalography (iEEG) recordings with analyses using deep neural networks and semantic models to probe the representational format and temporal dynamics of information in VSTM. We found clear evidence that VSTM maintenance occurred in two distinct representational formats which originated from different encoding periods. The first format derived from an early encoding period (250 to 770 ms) corresponded to higher-order visual representations. The second format originated from a late encoding period (1,000 to 1,980 ms) and contained abstract semantic representations. These representational formats were overall stable during maintenance, with no consistent transformation across time. Nevertheless, maintenance of both representational formats showed substantial arrhythmic fluctuations, i.e., waxing and waning in irregular intervals. The increases of the maintained representational formats were specific to the phases of hippocampal low-frequency activity. Our results demonstrate that human VSTM simultaneously maintains representations at different levels of processing, from higher-order visual information to abstract semantic representations, which are stably maintained via coupling to hippocampal low-frequency activity. © 2020 mSystems. All rights reserved.

基金：
ACKNOWLEDGMENTS. We thank Elkan Akyürek, Mark Stokes, Bryan Strange, and Johannes Sarnthein for reviewing and providing insightful feedback on our paper and Yuntao Zhou and Youyan Li for help with the data collection. G.X. received grants from the National Science Foundation of China (31730038), the China–Israel collaborative research grant (NSFC 31861143040), and the Guangdong Pearl River Talents Plan Innovative and Entrepreneurial Team Grant 2016ZT06S220. N.A. received funding from the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), Projektnummer 316803389–SFB 1280, via Projektnummer 122679504–SFB 874, and via DFG Grant AX 82/3. H.Z. received funding by DFG Projektnummer 429281110.
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外文
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出版当年[2019]版：
大类 | 1 区 综合性期刊
小类 | 1 区 综合性期刊
最新[2025]版：
大类 | 1 区 综合性期刊
小类 | 1 区 综合性期刊
JCR分区：
出版当年[2018]版：
Q1 MULTIDISCIPLINARY SCIENCES
最新[2023]版：
Q1 MULTIDISCIPLINARY SCIENCES

影响因子： 最新[2023版] 最新五年平均 出版当年[2018版] 出版当年五年平均 出版前一年[2017版] 出版后一年[2019版]

第一作者：
第一作者机构： [1]State Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, 100875 Beijing, China [2]IDG/McGovern Institute for BrainResearch, Beijing Normal University, 100875 Beijing, China
共同第一作者：
通讯作者：
推荐引用方式(GB/T 7714)：
Liu J,Zhang H,Yu T,et al.Stable maintenance of multiple representational formats in human visual short-term memory[J].PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA.2020,117(51):32329-32339.doi:10.1073/pnas.2006752117.
APA：
Liu, J,Zhang, H,Yu, T,Ni, D,Ren, L...&Xue, G.(2020).Stable maintenance of multiple representational formats in human visual short-term memory.PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,117,(51)
MLA：
Liu, J,et al."Stable maintenance of multiple representational formats in human visual short-term memory".PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA 117..51(2020):32329-32339

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