Original sentence: Rapid eye movement sleep behaviour disorder (RBD) is a sleep disorder (more specifically a parasomnia) that involves abnormal behavior during the sleep phase with rapid eye movements (REM sleep).The mean age of onset is estimated to be around 60 years of age.This extends from simple limb twitches to more complex integrated movements where sufferers appear to be unconsciously acting out their dreams
Edited sentence: Rapid eye movement sleep behaviour disorder (RBD) is a sleep disorder (more specifically a parasomnia) that involves abnormal behavior during the sleep phase with rapid eye movement (REM sleep).The mean age of onset is estimated to be around 60 years.This extends from simple limb twitches to more complex integrated movement, in which sufferers appear to be unconsciously acting out their dreams