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Synchronized network activity as the origin of a P 300 component in a facial attractiveness judgment task
Author(s) -
Zhang Yuan,
Tang Akaysha C.,
Zhou Xiaolin
Publication year - 2014
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/psyp.12153
Subject(s) - psychology , attractiveness , task (project management) , facial attractiveness , component (thermodynamics) , cognitive psychology , communication , social psychology , psychoanalysis , management , economics , physics , thermodynamics
Many studies have used the P 300 as an index for cognitive processing and neurological/psychiatric disorders. Here, we combined the source separation and source localization methods to investigate the cortical origins of the P 300 elicited in a facial attractiveness judgment task. For each participant, we applied second‐order blind identification ( SOBI ) to continuous EEG data to decompose the mixture of brain signals and noise. We then used the equivalent current dipole ( ECD ) models to estimate the centrality of the SOBI ‐recovered P 300. We found that the ECD models, consisting of dipoles in the frontal and posterior association cortices, account for 96.5 ± 0.5% of variance in the scalp projection of the component. Given that the recovered dipole activities in different brain regions share the same time course with different weights, we conclude that the P 300 originates from synchronized activity between anterior and posterior parts of the brain.