Prestimulus theta activity predicts correct source memory retrieval

被引：152

作者：

Addante, Richard J. ^{[1
]}

Watrous, Andrew J. ^{[1
]}

Yonelinas, Andrew P. ^{[1
,2
,3
]}

Ekstrom, Arne D. ^{[1
,2
]}

Ranganath, Charan ^{[1
,2
]}

机构：

[1] Univ Calif Davis, Ctr Neurosci, Davis, CA 95616 USA

[2] Univ Calif Davis, Dept Psychol, Davis, CA 95616 USA

[3] Univ Calif Davis, Ctr Mind & Brain, Davis, CA 95616 USA

来源：

PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA | 2011年 / 108卷 / 26期

关键词：

EEG; oscillation; MEDIAL TEMPORAL-LOBE; RECOGNITION MEMORY; EPISODIC MEMORY; PREFRONTAL CORTEX; GAMMA OSCILLATIONS; RECOLLECTION; TASK; CONTEXT; RHYTHM; ITEM;

D O I：

10.1073/pnas.1014528108

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Recent evidence indicates that the processing of a stimulus can be influenced by preceding patterns of brain activity. Here we examine whether prestimulus oscillatory brain activity can influence the ability to retrieve episodic memories. Neural activity in the theta-frequency band (4-8 Hz) was enhanced before presentation of test items which elicited accurate recollection of contextual details of the prior study episode ("source retrieval"), relative to trials for which item recognition was successful but source retrieval failed. Poststimulus theta activity was also related to source retrieval, and the magnitude of poststimulus theta was predicted by the magnitude of the prestimulus theta effects. The results suggest that ongoing neural processes occurring before stimulus onset might play a critical role in readying the brain for successful memory retrieval.

引用

页码：10702 / 10707

页数：6

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