The aim of the current dissertation was to examine the psychological, neurological and behavioral impact of different types of traumatic (A1) and stressful (non-A1) life events, including a focus... Show moreThe aim of the current dissertation was to examine the psychological, neurological and behavioral impact of different types of traumatic (A1) and stressful (non-A1) life events, including a focus on the impact of childhood maltreatment. The role of brain structure (hippocampal volume) and function (neural correlates of emotional face processing and social rejection) in intergenerational transmission of child abuse versus neglect was investigated using a multi-generational family study design. Show less
For many traits, males show greater variability than females, with possible implications for understanding sex differences in health and disease. Here, the ENIGMA (Enhancing Neuro Imaging Genetics... Show moreFor many traits, males show greater variability than females, with possible implications for understanding sex differences in health and disease. Here, the ENIGMA (Enhancing Neuro Imaging Genetics through Meta-Analysis) Consortium presents the largest-ever mega-analysis of sex differences in variability of brain structure, based on international data spanning nine decades of life. Subcortical volumes, cortical surface area and cortical thickness were assessed in MRI data of 16,683 healthy individuals 1-90 years old (47% females). We observed significant patterns of greater male than female between-subject variance for all subcortical volumetric measures, all cortical surface area measures, and 60% of cortical thickness measures. This pattern was stable across the lifespan for 50% of the subcortical structures, 70% of the regional area measures, and nearly all regions for thickness. Our findings that these sex differences are present in childhood implicate early life genetic or gene-environment interaction mechanisms. The findings highlight the importance of individual differences within the sexes, that may underpin sex-specific vulnerability to disorders. Show less
