DBS is NOT a cure for dystonia. If the stimulator is turned off or malfunctioning, dystonic symptoms will return. DBS can decrease the abnormal movements and postures in dystonia but generally does not entirely eliminate them. The degree of benefit varies depending on the individual patient, the type of dystonia, and appears to vary also with disease duration. Adolescents and young adults with inherited forms of dystonia (DYT1) appear to obtain most benefit. For those patients with secondary dystonia (from a stroke, or cerebral palsy for example), the benefit is generally limited. Patients with fixed skeletal deformities secondary to dystonia may also get less benefit.