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Event‐related oscillations (EROs) and event‐related potentials (ERPs) comparison in facial expression recognition
Author(s) -
Balconi Michela,
Pozzoli Uberto
Publication year - 2007
Publication title -
journal of neuropsychology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.85
H-Index - 37
eISSN - 1748-6653
pISSN - 1748-6645
DOI - 10.1348/174866407x184789
Subject(s) - psychology , electroencephalography , event related potential , sadness , stimulus (psychology) , facial expression , happiness , alpha (finance) , audiology , emotional expression , neuroscience , cognitive psychology , developmental psychology , communication , anger , social psychology , medicine , construct validity , psychometrics
The study aims to explore the significance of event‐related potentials (ERPs) and event‐related brain oscillations (EROs) (delta, theta, alpha, beta, gamma power) in response to emotional (fear, happiness, sadness) when compared with neutral faces during 180–250 post‐stimulus time interval. The ERP results demonstrated that the emotional face elicited a negative peak at approximately 230 ms (N2). Moreover, EEG measures showed that motivational significance of face (emotional vs. neutral) could modulate the amplitude of EROs, but only for some frequency bands (i.e. theta and gamma bands). In a second phase, we considered the resemblance of the two EEG measures by a regression analysis. It revealed that theta and gamma oscillations mainly effect as oscillation activity at the N2 latency. Finally, a posterior increased power of theta was found for emotional faces.