| An event-related potential study of working memory in children |
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| 作者姓名： | LIU Rong GUO Chunyan JIANG Yang |
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| 作者单位： | [1]Elementary Education College, Capital Normal University, Beijing 101100, China [2]Psychology Department, Capital Normal University, Beijing 100037, China [3]Behavioral Science Department, University of Kentucky College of Medicine, Lexington, Kentucky, KY 40536-0086, USA |
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| 基金项目： | Acknowledgements This research was conducted in the Beijing Key Laboratory and in conjunction with the Beijing Key Course. This work was supported by the Chinese Ministry of Education （Grant No. 20040028001）, the National Natural Science Foundation of China （Grant Nos. 30170322 ＆ 30570603）, Ministry of Science and Technology grant 95-special-09. Jing Yang is supported by National Institutes of Health （Grant No. AG00986）. |
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| 摘 要： | Working memory refers to temporary storage and manipulation of “on-line” information in the brain,which is central to a large range of cognitive capabili- ties1]. Visual working memory involves processes such as maintaining, updating and manipulating b…
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| 关 键 词： | 内存储器 目标 转移 ERP 儿童 |
| 收稿时间： | 2006-01-26 |
| 修稿时间： | 2006-01-262006-04-19 |
An event-related potential study of working memory in children |
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| LIU Rong GUO Chunyan JIANG Yang.An event-related potential study of working memory in children[J].Chinese Science Bulletin,2006,51(12):1467-1475. |
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| Authors: | Rong Liu Chunyan Guo Yang Jiang |
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| Institution: | (1) Elementary Education College, Capital Normal University, Beijing, 101100, China;(2) Psychology Department, Capital Normal University, Beijing, 100037, China;(3) Behavioral Science Department, University of Kentucky College of Medicine, Lexington, Kentucky, KY 40536-0086, USA |
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| Abstract: | To examine the neural mechanisms of working memory in children, event-related potentials (ERPs) were recorded from the 12–13
year-old while they performed a delayed match-to-sample task. The ERP results revealed that new and studied objects both evoked
a late positive ERP component peaking around 350 ms during the working memory process. New objects evoke a more positive ERP
waveform than the studied objects. The scalp distribution showed that the frontal-central electrode sites were associated
with object working memory processes. When tracking new or studied targets among visual distracters, ERPs of targets and distracters
revealed differential responses as early as 150 ms. The visual targets evoked larger and more positive ERP responses than
the distracters. The typical old-new effect was observed between ERPs of studied and new distracters. However, ERPs of new
and studied targets differed at about 250 ms, in which new targets evoked more positive-going and slightly earlier ERP responses.
In addition, a P3a component was found for new targets only, and was absent in ERPs of studied targets at frontal and central
sites. The present study results reveal the spatial and temporal characteristics of neural mechanisms underlying working memory
in children, some of which are distinct from those in adults. |
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| Keywords: | children working memory target distracter ERP old new effect |
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