Contribution of Brain Cortical Features to the Psychological Risk Profile of Juvenile Offenders

Objectives: This study contributes to the neuroscience of offending behavior by addressing two aims: a) to examine differences in the cortical features in a group of male serious juvenile offenders (21 OG), versus controls (28 CG), both ranging from 18 to 21 years old; and b) to determine to what extent the differential cortical features and the risk psychological profile discriminate between the two groups. Method: Besides cortical measures, demographics, executive functioning, childhood trauma, psychopathic traits, psychopathological symptoms, and antisocial and delinquent behavior were assessed. Results: Whole-brain analysis of the cortical mantle identified increased cortical thickness in the cluster comprising the right middle temporal gyrus and a smaller surface area in the lateral orbitofrontal cortex for the OG compared to the CG. The discriminant function correctly classified 100% of cases of the CG and 94.7% of the OG. Right temporal cluster, childhood trauma, callousness and symptoms of interpersonal sensitivity, psychoticism, depression, phobic anxiety, and obsessive-compulsive behavior contributed to the OG. In turn, the lateral orbitofrontal cluster, psychopathic traits of grandiosity, unemotionality, and thrill seeking, and working memory contributed to the CG. Conclusions: The increased right middle temporal gyrus of the OG could be indicative of impaired brain development in social cognition processes since it appeared in combination with the higher risk profile. The reduced orbitofrontal cortex could be indicative of immature brain development in emotional control processes since it appeared in combination with the normative psychological profile in adolescence. Based on these novel findings, areas of potential improvement for research and intervention are suggested.