Rhythmic movement disorders encompass repetitive, stereotyped gross-motor actions that occur at sleep onset or during sleep and may interfere with restorative rest or cause injury. Typically emerging ...

Stereotypic movement disorder is a motor disorder that develops in childhood, typically before grade school, and involves repetitive, purposeless movement. Examples of stereotypic movements include ...

Tic disorders are conditions featuring sudden, non-rhythmic movements or vocalizations. A formal tic disorder diagnosis is determined by tic frequency, duration, and type. Tics are non-rhythmic ...