Tourette Syndrome Tic Disorder Gilles de la Tourette Syndrome Tourette Syndrome (TS) is a neurological disorder characterized by repetitive, involuntary movements and vocalizations called tics. These tics can range from mild to severe and may involve motor tics, such as blinking or head jerking, and vocal tics, such as grunting or shouting, often impacting daily activities and social interactions.