Document Detail

Time-varying spectral entropy differentiates between positive and negative feed back-related EEG activity in a hypothesis testing paradigm.
MedLine Citation:
PMID:  17692418     Owner:  NLM     Status:  MEDLINE    
Positive and negative performance feedbacks have been shown to differentially modulate amplitudes of the associated electroencephalographic (EEG) brain activity. In the present study, we tested whether feedback also modulates the organization of neuronal oscillations. Ten college students serially tested hypotheses concerning a hidden rule by judging its presence or absence in triplets of digits and revised them on the basis of an exogenous performance feedback. The EEG signal time-locked to feedback was convolved with a family of complex wavelets. The time-varying spectral entropy of the resulting time-frequency representation was then computed. The results showed that feedback differentially modulated spectral organization at frontal and posterior scalp regions around 200 ms and in the 300-500 ms range. Spatio-temporal principal component analysis (PCA) indicated that feedback-specific modulations essentially resulted from the interplay between fronto-polar, fronto-central, and parieto-occipital components. Functional and methodological implications were discussed.
David Papo; Jean-Paul Caverni; Abdel Douiri; Ilana Podlipsky; Pierre-Marie Baudonnière
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-07-03
Journal Detail:
Title:  International journal of psychophysiology : official journal of the International Organization of Psychophysiology     Volume:  66     ISSN:  0167-8760     ISO Abbreviation:  Int J Psychophysiol     Publication Date:  2007 Dec 
Date Detail:
Created Date:  2007-12-06     Completed Date:  2008-03-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8406214     Medline TA:  Int J Psychophysiol     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  183-95     Citation Subset:  IM    
Laboratoire de Psychologie Cognitive, CNRS UMR 6146, Case 66, Université de Provence, Place V Hugo 133 31, Marseille Cedex 3, France.
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MeSH Terms
Brain / physiology*
Brain Mapping*
Feedback, Psychological*
Photic Stimulation
Principal Component Analysis
Reaction Time / physiology
Spectrum Analysis*
Time Factors

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