Title |
Differences in brain circuitry for appetitive and reactive aggression as revealed by realistic auditory scripts
|
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Published in |
Frontiers in Behavioral Neuroscience, December 2014
|
DOI | 10.3389/fnbeh.2014.00425 |
Pubmed ID | |
Authors |
James K. Moran, Roland Weierstall, Thomas Elbert |
Abstract |
Aggressive behavior is thought to divide into two motivational elements: The first being a self-defensively motivated aggression against threat and a second, hedonically motivated "appetitive" aggression. Appetitive aggression is the less understood of the two, often only researched within abnormal psychology. Our approach is to understand it as a universal and adaptive response, and examine the functional neural activity of ordinary men (N = 50) presented with an imaginative listening task involving a murderer describing a kill. We manipulated motivational context in a between-subjects design to evoke appetitive or reactive aggression, against a neutral control, measuring activity with Magnetoencephalography (MEG). Results show differences in left frontal regions in delta (2-5 Hz) and alpha band (8-12 Hz) for aggressive conditions and right parietal delta activity differentiating appetitive and reactive aggression. These results validate the distinction of reward-driven appetitive aggression from reactive aggression in ordinary populations at the level of functional neural brain circuitry. |
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