<unk>  or REM<unk>  disorder <unk>  is a<unk>  disorder in which people act out their dreams. It involves abnormal<unk>  during the<unk>  phase with<unk> <unk><unk>  (REM)<unk> . The major feature of<unk>  is loss of muscle atonia (i.e., the loss of paralysis) during otherwise intact REM<unk>  (during which paralysis is not only normal but necessary). The loss of motor inhibition leads to<unk><unk> s ranging from simple limb twitches to more complex integrated<unk> s that can be violent or result in injury to either the individual or their bedmates.<unk>  is a very strong predictor of progression to a synucleinopathy (usually Parkinson's disease or dementia with Lewy bodies). Melatonin is useful in the treatment of<unk> .<unk>  was first described in 1986.
Rapid eye movement sleep behavior disorder
Circadian rhythm sleep disorder
Delayed sleep phase disorder
Advanced sleep phase disorder
Shift work sleep disorder
Idiopathic hypersomnia
Nightmare disorder
Attention deficit hyperactivity disorder