Rapid eye movement (REM) @entity25 (RBD) is a @entity4939 characterised by elaborate behaviours during REM sleep usually associated with action-filled dreams. Typical behaviours are screaming, grasping, punching, kicking and occasionally jumping out of bed, which are potentially harmful for the @entity1 and their bed partner. Polysomnographic (PSG) recording reveals a @entity393 and an excessive phasic motor activity during REM sleep. RBD affects mainly @entity1 over 50 years and its prevalence in the general population is estimated around 0.5%. It may occur in acute or chronic forms. The latter may be isolated (idiopathic RBD), or associated with other @entity16 (symptomatic RBD), especially with a group of @entity179 called alpha-synucleinopathies, which includes @entity191 , @entity1832 ( @entity1832 ) and multiple system @entity194 . The idiopathic form accounts for up to 60% of the cases reported in the literature. Small clinical follow-up studies revealed that a proportion of these @entity1 will eventually develop a @entity191 and/or a @entity1832 in the years following the RBD diagnosis, while some @entity1 will remain idiopathic for decades. Recent studies found evidence of @entity409 during both wakefulness and sleep in iRBD, such as an impairment of the cortical activity, specific @entity51 , signs of @entity5433 , @entity1650 , @entity854 in quantitative measures of motor and gait speed and an @entity73 . The notion of "idiopathic" RBD is currently challenged and the use of a more conservative term of "cryptogenic" RBD has been suggested.

Idiopathic rapid eye movement XXXX .

@entity1 :: ('9606', 'Species') :: ['patients', 'patient', 'men'] @entity73 :: ('MESH:D003072', 'Disease') :: ['olfactory impairment'] @entity16 :: ('MESH:D009422', 'Disease') :: ['neurological diseases'] @entity409 :: ('MESH:D008107', 'Disease') :: ['neural dysfunction'] @entity1650 :: ('MESH:D001308', 'Disease') :: ['deficit of colour discrimination'] @entity191 :: ('MESH:D010300', 'Disease') :: ["Parkinson's disease", 'parkinsonian syndrome'] @entity4939 :: ('MESH:D020447', 'Disease') :: ['parasomnia'] @entity51 :: ('MESH:D009461', 'Disease') :: ['neuropsychological deficits'] @entity1832 :: ('MESH:D020961', 'Disease') :: ['dementia with Lewy bodies', 'DLB'] @entity179 :: ('MESH:D019636', 'Disease') :: ['neurodegenerative disease'] @entity194 :: ('MESH:D001284', 'Disease') :: ['atrophy'] @entity854 :: ('MESH:D018376', 'Disease') :: ['subtle abnormalities'] @entity5433 :: ('MESH:C563939', 'Disease') :: ['autonomic dysfunction'] @entity393 :: ('MESH:D034381', 'Disease') :: ['loss of atonia'] @entity25 :: ('MESH:D012893', 'Disease') :: ['sleep behaviour disorder']
@entity25 :: (MESH:D012893,Disease) :: ['sleep behaviour disorder']
