<unk>  <unk>  is a motor<unk>  with onset in childhood involving restrictive and/or repetitive, nonfunctional motor behavior (e.g., hand waving or head banging), that markedly interferes with normal activities or results in bodily injury. To be classified as<unk> , the behavior in question must not be due to the direct effects of a substance, autism, or another medical condition. The cause of this<unk>  is not known.
Stereotypic movement disorder
Rhythmic movement disorder
Torsion dystonia
Essential tremor
Periodic limb movement disorder
Tardive dyskinesia
Episodic dyscontrol syndrome
Focal dystonia