MRI and its derivatives have demonstrated important findings in ASD as has been reviewed extensively [13-16]. The earliest anatomical studies involved recog- nition that young children with ASD have abnormally increased total brain volumes that appear related to both increased grey and white matter volumes, with a differentially higher white matter contribution. Brain size in ASD appears to reach a 10% increase beyond control values by two to four years of age, possibly fol- lowed by a plateau. Regional brain growth specificity studies, however, have shown little consistency with the exception of decreased corpus callosum volume in ASD suggesting decreased interhemispheric connectivity. Dif- fusion magnetic resonance imaging (DMRI) studies in children and adults have.
