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Objective Stereotyped behavior relates to one of the most typical characteristics in children with autism spectrum disorders(ASD),however,the neurobiological mechanism is still unclear.In this study,we examined the resting state functional connectivity of premotor area in order to determine whether alterations can be found to distinguish ASD from healthy controls,and correlated the behavior variables with connectivity.Methods 39 children with ASD and 42 age,sex,and IQ-matched healthy children were recruited.All the 81 subjects performed scaling with behavior scale index and underwent resting-state fMRI scans.After the fMRI data preprocessing,the left and right side premotor were selected as ROI seeds to perform functional connectivity.