期刊
NEUROSCIENCE LETTERS
卷 633, 期 -, 页码 220-226出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.neulet.2016.09.047
关键词
Alpha band; Working memory; Maintenance; Neural oscillation; Time course
资金
- National Natural Science Foundation of China [31170994, 31500896]
A putative functional role for alpha oscillations in working memory remains controversial. However, recent evidence suggests that such oscillation may reflect distinct phases of working memory processing. The present study investigated alpha band (8-13 Hz) activity during the maintenance stage of working memory using a modified Sternberg working memory task. Our results reveal that alpha power was concentrated primarily in the occipital cortex and was decreased during the early stage of maintenance (0-600 ms), and subsequently increased during the later stage of maintenance (1000-1600 ms). We suggest that reduced alpha power may be involved in focused attention during the working memory maintenance, whereas increased alpha power may reflect suppression of visual stimuli to facilitate internal processing related to the task. This interpretation is generally consistent with recent reports suggesting that variations in alpha power are associated with the representation and processing of information in the discrete time intervals during the working memory maintenance. (C) 2016 Elsevier Ireland Ltd. All rights reserved.
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