When a patient has REM sleep behavior disorder, they lack the paralysis that usually occurs in REM sleep. This absent or ...

People who are afflicted may complain of disrupted sleep or excessive daytime sleepiness. REM behavior disorder affects fewer than 1% of adults. It's more common in men and adults over age 50.

This system normally works very well, but it can fail in two different ways: The first is called REM sleep behavior disorder (RBD), and it’s when people do move or talk while dreaming.