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Large-scale neural correlates of affective picture processing

Published online by Cambridge University Press:  20 August 2002

ANDREAS KEIL ,
MARGARET M. BRADLEY ,
OLAF HAUK ,
BRIGITTE ROCKSTROH ,
THOMAS ELBERT  and
PETER J. LANG
ANDREAS KEIL
Affiliation:
Department of Psychology, University of Konstanz, Konstanz, Germany
MARGARET M. BRADLEY
Affiliation:
NIMH Center for the Study of Emotion and Attention, University of Florida, Gainesville, Florida, USA
OLAF HAUK
Affiliation:
Medical Research Council, Cognition and Brain Sciences Unit, Cambridge, United Kingdom
BRIGITTE ROCKSTROH
Affiliation:
Department of Psychology, University of Konstanz, Konstanz, Germany
THOMAS ELBERT
Affiliation:
Department of Psychology, University of Konstanz, Konstanz, Germany
PETER J. LANG
Affiliation:
NIMH Center for the Study of Emotion and Attention, University of Florida, Gainesville, Florida, USA
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Abstract

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.

Keywords

Dense-array electroencephalogramEmotionMotivationArousalPicture perceptionSource modelingMinimum norm estimate
Type
Research Article
Information
Psychophysiology , Volume 39 , Issue 5 , September 2002 , pp. 641 - 649
Copyright
© 2002 Society for Psychophysiological Research

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