Vagus Nerve Stimulator for Autism and Other Developmental Disorders

The goal of this flexible single-subject design vagus nerve stimulation (VNS) study is to examine the behavioral, cognitive, and biorhythmic effects of VNS in children and adults with autism and developmental disabilities. The main aims are: * Pilot the creation of a profile for those who will respond to VNS with the long-term goal of designing clinical trials. * Examine the effects of VNS on a broad range of symptoms. Participants will select between 1, 2, or 3 months of daily VNS treatment and complete study visits each month.