A boy infant with sleep related rhythmic movement disorder showing arm banging

OBJECTIVE: To present a male patient who performed arm banging on his face during sleep every night since 7 months of age. METHODS: Clinical course of this patient with electroencephalographic recording with video recording at 23 months of age was shown. RESULTS: His arm banging began at the age of 7 months and showed no complete remission at the age of 57 months of age, although clonazepam revealed mild effects on its intensity and frequency. DISCUSSION: We diagnosed him as having arm banging type of sleep related rhythmic movement disorder. To our knowledge, no precise description on this type of sleep related rhythmic movement disorder has been found. In addition, this patient seemed to be the youngest case of sleep related rhythmic movement disorder showing arm banging.