Oscillatory brain activity in the time frequency domain associated to change blindness and change detection awareness
Entity
UAM. Departamento de Psicología Biológica y de la SaludPublisher
Cambridge MIT Press; Cognitive Neuroscience InstituteDate
2012-02Citation
10.1162/jocn_a_00073.
Journal of Cognitive Neuroscience 24.2 (2012): 337-350
ISSN
0048-5772 (print); 1469-8986 (online)DOI
10.1162/jocn_a_00073.Funded by
This study was supported by two grants from the Spanish MEC (SEJ2007-61397 and PSI2010-21427).Project
Gobierno de España. SEJ2007-61397; Gobierno de España. PSI2010-21427Editor's Version
http://dx.doi.org/10.1162/jocn_a_00073.Subjects
Oscillatory brain activity; Time frequency domain; Change blindness; Change detection awareness; Visual perception; Medicina; PsicologíaRights
© 2011 Massachusetts Institute of TechnologyAbstract
Despite the importance of change detection (CD) for visual perception and for performance in our environment, observers often miss changes that should be easily noticed. In the present study, we employed time–frequency analysis to investigate the
neural activity associated with CD and change blindness (CB). Observers were resented with two successive visual displays and had to look for a change in orientation in any one of four sinusoid gratings between both displays. Theta power increased widely over the scalp after the second display when a change was consciously detected. Relative to nochange and CD, CB was associated with a pronounced theta power enhancement at
parietal-occipital and occipital sites and broadly distributed alpha power suppression during the processing of the prechange display. Finally, power suppressions in the beta band following the second display show that, even when a change is not consciously
detected, it might be represented to a certain degree. These results showthe potential of time–frequency analysis to deepen our knowledge of the temporal curse of the neural events underlying CD. The results further reveal that the process resulting in CB
begins even before the occurrence of the change itself.
Files in this item
Google Scholar:Darriba, Álvaro
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Pazo-Álvarez, Paula
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Capilla, Almudena
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Amenedo, Elena
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