The white matter integrity of the ATR has been widely reported to be decreased in psychiatric disorders (McIntosh et al. 2008; Mamah et al. 2010; Perez-Iglesias et al. 2010) and in psychosis-risk-associated neuregulin-1 variants (Sprooten et al. 2009; Barnes et al. 2012). Here, NRG1 is linked to psychotic disorder.