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Greater neural pattern similarity across repetitions is associated with better memory.


ABSTRACT: Repeated study improves memory, but the underlying neural mechanisms of this improvement are not well understood. Using functional magnetic resonance imaging and representational similarity analysis of brain activity, we found that, compared with forgotten items, subsequently remembered faces and words showed greater similarity in neural activation across multiple study in many brain regions, including (but not limited to) the regions whose mean activities were correlated with subsequent memory. This result addresses a longstanding debate in the study of memory by showing that successful episodic memory encoding occurs when the same neural representations are more precisely reactivated across study episodes, rather than when patterns of activation are more variable across time.

SUBMITTER: Xue G 

PROVIDER: S-EPMC2952039 | biostudies-literature | 2010 Oct

REPOSITORIES: biostudies-literature

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Greater neural pattern similarity across repetitions is associated with better memory.

Xue Gui G   Dong Qi Q   Chen Chuansheng C   Lu Zhonglin Z   Mumford Jeanette A JA   Poldrack Russell A RA  

Science (New York, N.Y.) 20100909 6000


Repeated study improves memory, but the underlying neural mechanisms of this improvement are not well understood. Using functional magnetic resonance imaging and representational similarity analysis of brain activity, we found that, compared with forgotten items, subsequently remembered faces and words showed greater similarity in neural activation across multiple study in many brain regions, including (but not limited to) the regions whose mean activities were correlated with subsequent memory.  ...[more]

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