Open AccessCommunity violence exposure correlates with smaller gray matter volume and lower IQ in urban adolescents
Author(s) -
Butler Oisin,
Yang XiaoFei,
Laube Corinna,
Kühn Simone,
ImmordinoYang Mary Helen
Publication year - 2018
Publication title -
human brain mapping
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.005
H-Index - 191
eISSN - 1097-0193
pISSN - 1065-9471
DOI - 10.1002/hbm.23988
Subject(s) - psychology , cognition , neuroimaging , intelligence quotient , affect (linguistics) , socioeconomic status , poison control , effects of sleep deprivation on cognitive performance , anterior cingulate cortex , clinical psychology , brain size , psychiatry , developmental psychology , medicine , environmental health , magnetic resonance imaging , population , communication , radiology
Adolescents’ exposure to community violence is a significant public health issue in urban settings and has been associated with poorer cognitive performance and increased risk for psychiatric illnesses, including PTSD. However, no study to date has investigated the neural correlates of community violence exposure in adolescents. Sixty‐five healthy adolescents (age = 14–18 years; 36 females, 29 males) from moderate‐ to high‐crime neighborhoods in Los Angeles reported their violence exposure, parents’ education level, and free/reduced school lunch status (socio‐economic status, SES), and underwent structural neuroimaging and intelligence testing. Violence exposure negatively correlated with measures of SES, IQ, and gray matter volume. Above and beyond the effect of SES, violence exposure negatively correlated with IQ and with gray matter volume in the left inferior frontal gyrus and anterior cingulate cortex, regions involved in high‐level cognitive functions and autonomic modulation, and previously shown to be reduced in PTSD and combat‐exposed military populations. The current results provide first evidence that frontal brain regions involved in cognition and affect appear to be selectively affected by exposure to community violence, even in healthy nondelinquent adolescents who are not the direct victims or perpetrators of violence.