| EEG gamma-band activity in rapid serial visual presentation. | |
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MedLine Citation:
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PMID: 16328311 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Evidence is available that oscillatory activity in the gamma frequency range (>30 Hz) might be related to the attentional selection of target items. Rapid serial visual presentation (RSVP) paradigms are instrumental in addressing cognitive functions such as visual attention, and they are increasingly combined with the measurement of electrical brain activity. In the present study, gamma-band responses for target and standard stimuli were investigated in an RSVP oddball paradigm. In a first study, stimuli were presented at a frequency of 10 Hz, the stimulus sequence consisted of rare colored letters (targets) and frequent black letters (standards). In addition, stimulus size was varied across experimental blocks. Significant target modulations were observed for the P3 ERP and induced (i.e., not phase-locked) gamma-band responses. Besides this late activation, no further gamma-band responses were observed. A second study aimed at replicating these findings by employing a reduced stimulus presentation rate of 7.1 Hz. Again, besides the P3 ERP a late increase in induced gamma-band activity was observed. However, as compared to Study 1, this induced response was less pronounced. The induced gamma-band response observed in the present studies might reflect utilization of information derived from previous processing steps for behavioral performance or memory storage as suggested in the 'match-and-utilization-model' of gamma activity. |
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Authors:
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Cornelia Kranczioch; Stefan Debener; Christoph S Herrmann; Andreas K Engel |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2005-11-18 |
Journal Detail:
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Title: Experimental brain research. Experimentelle Hirnforschung. Expérimentation cérébrale Volume: 169 ISSN: 1432-1106 ISO Abbreviation: Exp Brain Res Publication Date: 2006 Feb |
Date Detail:
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Created Date: 2006-02-09 Completed Date: 2008-05-08 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0043312 Medline TA: Exp Brain Res Country: Germany |
Other Details:
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Languages: eng Pagination: 246-54 Citation Subset: IM |
Affiliation:
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Institut für Neurophysiologie und Pathophysiologie, Zentrum für Experimentelle Medizin, Universitätsklinikum Hamburg-Eppendorf, Martinistr. 52, 20246, Hamburg, Germany. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Analysis of Variance Brain / physiology* Brain Mapping Color Perception / physiology Electroencephalography* Event-Related Potentials, P300 / physiology* Evoked Potentials, Visual* Female Humans Male Oscillometry Pattern Recognition, Visual Photic Stimulation Reaction Time / physiology Time Factors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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