“Atypical or unusual sensory responses are common in children with autism spectrum disorder (ASD) and often one of the earliest indicators of autism in childhood. A large percentage of children with ASD (78 to 90%) have sensory processing problems. Sensory issues are now included in the DSM-5 symptom criteria for restricted, repetitive patterns of behavior, interests, or activities (RRBs). These are mostly problems of sensory modulation expressed as hyper-or hypo-reactivity to sensory input or unusual interest in sensory aspects of the environment. ”

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