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Title: Neural correlates of implicit knowledge about statistical regularities
Authors: Otsuka, Sachio
Saiki, Jun  kyouindb  KAKEN_id
Author's alias: 大塚, 幸生
齋木, 潤
Keywords: Statistical learning
Implicit knowledge
Posterior cingulate cortex
Parietal lobe
Precuneus
Issue Date: Dec-2017
Publisher: Springer Science and Business Media LLC
Journal title: Experimental Brain Research
Volume: 235
Issue: 12
Start page: 3573
End page: 3583
Abstract: In this study, we examined the neural correlates of implicit knowledge about statistical regularities of temporal order and item chunks using functional magnetic resonance imaging (fMRI). In a familiarization scan, participants viewed a stream of scenes consisting of structured (i.e., three scenes were always presented in the same order) and random triplets. In the subsequent test scan, participants were required to detect a target scene. Test sequences included both forward order of scenes presented during the familiarization scan and backward order of scenes (i.e., reverse order of forward scenes). Behavioral results showed a learning effect of temporal order in the forward condition and scene chunks in the backward condition. fMRI data from the familiarization scan showed the difference of activations between the structured and random blocks in the left posterior cingulate cortex including the retrosplenial cortex. More important, in the test scan, we observed brain activities in the left parietal lobe when participants detected target scenes on temporal order information. In contrast, the left precuneus activated when participants detected target scenes based on scene chunks. Our findings help clarify the brain mechanisms of implicit knowledge about acquired regularities.
Rights: This is a post-peer-review, pre-copyedit version of an article published in Experimental Brain Research. The final authenticated version is available online at: http://dx.doi.org/10.1007/s00221-017-5083-4.
This is not the published version. Please cite only the published version. この論文は出版社版でありません。引用の際には出版社版をご確認ご利用ください。
URI: http://hdl.handle.net/2433/250170
DOI(Published Version): 10.1007/s00221-017-5083-4
PubMed ID: 28884209
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