Journal
PSYCHOPHYSIOLOGY
Volume 49, Issue 12, Pages 1545-1557Publisher
WILEY
DOI: 10.1111/j.1469-8986.2012.01484.x
Keywords
Magnetoencephalography; Emotion regulation; Phase synchrony; Brain oscillations
Funding
- Deutsche Forschungsgemeinschaft
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Hemodynamic and electromagnetic neuroimaging suggests a sequence of intraregional and interregional activity during emotion processing. Oscillatory activity within trials may offer insight into neural mechanisms involved in this process. MEG was measured in 24 subjects during passive viewing of neutral and unpleasant pictures and emotion regulation by cognitive reappraisal. Regulation prompted more gamma increase and alpha decrease to picture onset than did passive viewing. Source analysis confirmed differential modulation of these power changes in occipitoparietal regions during passive viewing and larger power changes in prefrontal regions during regulation. Local coupling of alpha phase to gamma amplitude within a medial prefrontal region and long-range synchrony of medial prefrontal, occipital, and temporoparietal regions index mechanisms of prefrontal top-down contribution to emotion processing.
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