Document Detail


Decoding attended information in short-term memory: an EEG study.
MedLine Citation:
PMID:  23198894     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
For decades it has been assumed that sustained, elevated neural activity--the so-called active trace--is the neural correlate of the short-term retention of information. However, a recent fMRI study has suggested that this activity may be more related to attention than to retention. Specifically, a multivariate pattern analysis failed to find evidence that information that was outside the focus of attention, but nonetheless in STM, was retained in an active state. Here, we replicate and extend this finding by querying the neural signatures of attended versus unattended information within STM with electroencephalograpy (EEG), a method sensitive to oscillatory neural activity to which the previous fMRI study was insensitive. We demonstrate that in the delay-period EEG activity, there is information only about memory items that are also in the focus of attention. Information about items outside the focus of attention is not detectable. This result converges with the fMRI findings to suggest that, contrary to conventional wisdom, an active memory trace may be unnecessary for the short-term retention of information.
Authors:
Joshua J LaRocque; Jarrod A Lewis-Peacock; Andrew T Drysdale; Klaus Oberauer; Bradley R Postle
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of cognitive neuroscience     Volume:  25     ISSN:  1530-8898     ISO Abbreviation:  J Cogn Neurosci     Publication Date:  2013 Jan 
Date Detail:
Created Date:  2012-12-03     Completed Date:  2013-05-16     Revised Date:  2013-10-23    
Medline Journal Info:
Nlm Unique ID:  8910747     Medline TA:  J Cogn Neurosci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  127-42     Citation Subset:  IM    
Affiliation:
NeuroscienceTraining Program, UW-Madison, 1056 Wisconsin Psychiatric Institute and Clinic, 6001 Research Park Blvd, Madison, WI 53719, USA. jjlarocque@gmail.com
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Attention / physiology*
Electroencephalography / instrumentation,  methods*
Female
Humans
Male
Memory, Short-Term / physiology*
Neuropsychological Tests
Recognition (Psychology) / physiology
Time Factors
Young Adult
Grant Support
ID/Acronym/Agency:
MH-064498-05/MH/NIMH NIH HHS; R01 MH064498/MH/NIMH NIH HHS; R01 MH095984/MH/NIMH NIH HHS; T32 GM008692/GM/NIGMS NIH HHS
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