supported by functional magnetic resonance imaging (fMRI) studies (Rane et al., 2015). Some fMRI studies observed disproportionate activation of ASD in the amygdala (Monk et al., 2010), cingulate gyrus (Shafritz, Dichter, Baranek, & Belger, 2008), fusiform gyrus (Pierce & Redcay, 2008), and other brain regions in the task state. Our previous resting state fMRI study showed alterations in functional connectivity in ASD boys aged 3–7 years, ASD children displayed significantly stronger functional connectivity between left postcentral gyrus and right angular gyrus, superior parietal gyrus and superior occipital gyrus, which may serve as important indicators of disease severity (Jia et al., 2017). According to previous MRI studies (Jia et al., 2017; Monk et al., 2010; Shafritz et al., 2008), ASD may be typically associated with widely distributed alterations of brain anatomy and functional connectivity with high spatial resolution. Despite a number of serious attempts, there are as yet no universally established centralized criteria that related to characterize ASD. This undoubtedly reflects the complexity of the underlying neural mechanism in ASD.
