REM sleep behavior disorder
Sleep disorder characterized by acting out dreams during REM sleep due to loss of normal muscle paralysis.
Full Definition
REM sleep behavior disorder (RBD) is a parasomnia characterized by the loss of normal muscle atonia during REM sleep, allowing patients to physically act out their dreams. This condition typically involves complex motor behaviors that can be violent or injurious, often corresponding to dream content such as fighting off attackers or fleeing from danger. RBD is particularly significant in neuropsychiatry as it frequently precedes the development of synucleinopathies such as Parkinson's disease, dementia with Lewy bodies, or multiple system atrophy by several years. The disorder requires polysomnographic confirmation and represents an important prodromal marker for neurodegenerative disease in clinical documentation.
Usage
Usage note: Often abbreviated as RBD; emphasize potential connection to future neurodegenerative disease in clinical contexts.
In Context
- "The patient's REM sleep behavior disorder preceded his Parkinson's disease diagnosis by approximately five years." — Longitudinal clinical history
- "Polysomnography confirmed REM sleep behavior disorder with documented muscle activity during REM episodes." — Sleep study interpretation