Rapid eye movement sleep behavior disorder or REM behavior disorder (RBD) is a sleep disorder (more specifically a parasomnia) in which people act out their dreams.It involves abnormal behavior during the sleep phase with rapid eye movement (REM) sleep. The major feature of RBD is loss of muscle atonia (i.e., the loss of paralysis) during otherwise intact REM sleep (during which paralysis is …
https://en.wikipedia.org/wiki/Rapid_eye_movement_sleep_behavior_disorder