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a Department of Human Development and Applied Psychology, University of Toronto, Toronto, ON, Canada b Community Health Systems Resource Group, Hospital for Sick Children, Toronto, Canada
Key Words: aggression • cortical source modeling • emotion • psychopathology • event-related potentials (ERPs)
Address for correspondence: Marc D. Lewis, Department of Human Development and Applied Psychology, University of Toronto, 252 Bloor St. West, Toronto, ON M5S 1V6, Canada. Voice: 416-923-6641 x2443. e-mail: mlewis{at}oise.utoronto.ca.
Children with aggressive behavior problems may have difficulties regulating negative emotions, resulting in harmful patterns of interpersonal behavior at home and in the schoolyard. Ventral and dorsal regions of the prefrontal cortex (PFC) have been associated with response inhibition and self-control—key components of emotion regulation. Our research program aims to explore differences among aggressive and normal children in the activation of these cortical regions during emotional episodes, to the extent possible using electrophysiological techniques, to identify diagnostic subtypes, gain insights into their interpersonal difficulties, and help develop effective treatment strategies. This report reviews several recent studies investigating individual and developmental differences in cortical mechanisms of emotion regulation, corresponding with different patterns of interpersonal behavior. Our methods include event-related potentials (ERPs) and cortical source modeling, using dense-array electroencephalography (EEG) technology, as well as videotaped observations of parent–child interactions, with both normal and aggressive children. By relating patterns of brain activation to observed behavioral differences, we find (i) a steady decrease in cortical activation subserving self-regulation across childhood and adolescence, (ii) different cortical activation patterns as well as behavioral constellations distinguishing subtypes of aggressive children, and (iii) robust correlations between the activation of cortical mediators of emotion regulation and flexibility in parent–child emotional communication in children referred for aggressive behavior problems. These findings point toward models of developmental psychopathology based on the interplay among biological, psychological, and social factors.
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