A small percentage of people affected by an often overlooked symptom could develop brain diseases such as Parkinson’s disease and dementia. The disorder is know as REM sleep behaviour disorder
It only affects around one percent of the population, reports The Mirror. REM is one of the stages of the sleep cycle and it plays an important role in dreaming, memory, emotional processing, and healthy brain development.
During this stage you enter a state of low muscle tone throughout the body, meaning your muscles don't 'act out' your dreams. But with REM sleep behaviour disorder, sufferers respond to their dreams, shouting, screaming and even kicking.
