Sensory impairment in Tourette syndrome: Evaluation of pre-movement gating of sensory evoked potentials

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Background: Tourette syndrome (TS) is a neurobehavioral disorder characterized by motor and vocal tics. Simple tics are purposeless involuntary movements that spontaneously resolve before adolescence. Complex tics appear to be semi-voluntary movements that may become intractable when associated with obsessive–compulsive disorder. Sensory tics or “urge” preceded by tics suggests impairment of sensorimotor processing in TS.