OLIG1 and autism: Consistent with the previous finding that FA in cc and fx was negatively correlated with autism symptom severity as measured by the Autism Diagnostic Interview-Revised (ADI-R) in individuals with ASD [3], we found that FA and RD values in several brain regions including cc and fx were correlated with total contact time in the reciprocal social interaction test in Olig1-Cre/Chd8L+/F and control mice.