- Record: found
- Abstract: not found
- Article: not found
EEG correlates (event-related desynchronization) of emotional face elaboration: A temporal analysis
There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
Abstract
An EEG frequency band analysis was conducted, in order to explore the significance
of brain oscillations (delta, theta, alpha and beta) for emotional face comprehension
during different post-stimulus time intervals (50-150; 150-250; 250-350; and 350-450
ms). The study was conducted on twenty adults who looked at emotional (happy, sad,
angry, fearful) or neutral faces. The results showed that motivational significance
of the stimulus can modulate the power synchronization (event-related desynchronization
(ERD) decrease) within the frequency band of delta and theta. We propose that delta
and theta respond to variations in processing stage of emotional face: whereas, delta
reflects updating of the stimulus, theta responds to the emotional significance of
face. The findings revealed that emotional discrimination by theta is observable mainly
within 150-250 time interval and that it is more distributed on anterior regions,
whereas delta is maximally synchronized within 250-350 interval and more posteriorly
distributed for all the stimulus type. Finally, a right-hemisphere dominance was found
for theta during emotional face comprehension.