REM Sleep Behaviour Disorder (RBD) is characterized by vigorous
sleep behaviors which may result in repeated injury to oneself
or others. These behaviours are often violent and occur during
the period of sleep called Rapid Eye Movement or REM sleep.
Normally during this phase of sleep, we dream and our muscles
are usually without any tone. However, in RBD, there is no loss
of this muscle tone and patients usually are able to move their
bodies and thereby act on their dreams. REM sleep behavior
disorder (RBD) is characterized by episodes of vigorous speech
or shouting, and violent movement or behaviour. It may cause
injury to the self or to the bed partner. Dream recall is vivid
and the dream content is often violent. Polysomnography is
useful in disclosing the violent episodes occurring only during
REM sleep. However, this disorder is often misdiagnosed and has
not frequently been reported in the United Kingdom