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Large‐scale neural correlates of affective picture processing
Author(s) -
Keil Andreas,
Bradley Margaret M.,
Hauk Olaf,
Rockstroh Brigitte,
Elbert Thomas,
Lang Peter J.
Publication year - 2002
Publication title -
psychophysiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.661
H-Index - 156
eISSN - 1469-8986
pISSN - 0048-5772
DOI - 10.1111/1469-8986.3950641
Subject(s) - psychology , cognitive psychology , scale (ratio) , neural correlates of consciousness , cognition , neuroscience , cartography , geography
Hemodynamic and electrophysiological studies indicate differential brain response to emotionally arousing, compared to neutral, pictures. The time course and source distribution of electrocortical potentials in response to emotional stimuli, using a high‐density electrode (129‐sensor) array were examined here. Event‐related potentials (ERPs) were recorded while participants viewed pleasant, neutral, and unpleasant pictures. ERP voltages were examined in six time intervals, roughly corresponding to P1, N1, early P3, late P3 and a slow wave window. Differential activity was found for emotional, compared to neutral, pictures at both of the P3 intervals, as well as enhancement of later posterior positivity. Source space projection was performed using a minimum norm procedure that estimates the source currents generating the extracranially measured electrical gradient. Sources of slow wave modulation were located in occipital and posterior parietal cortex, with a right‐hemispheric dominance.