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Front Neurol. 2012 May 17;3:82. doi: 10.3389/fneur.2012.00082. eCollection 2012.

Cognition in rapid eye movement sleep behavior disorder.

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1
Center for Advanced Research in Sleep Medicine, Hôpital du Sacré-Coeur de Montréal Montréal, QC, Canada.

Abstract

Rapid eye movement (REM) sleep behavior disorder (RBD) is a parasomnia characterized by excessive muscle activity and undesirable motor events during REM sleep. RBD occurs in approximately 0.5% of the general population, with a higher prevalence in older men. RBD is a frequent feature of dementia with Lewy bodies (DLB), but is only rarely reported in Alzheimer's disease. RBD is also a risk factor for α-synuclein-related diseases, such as DLB, Parkinson's disease (PD), and multiple system atrophy. Therefore, RBD has major implications for the diagnosis and treatment of neurodegenerative disorders and for understanding specific neurodegeneration patterns. Several markers of neurodegeneration have been identified in RBD, including cognitive impairments such as deficits in attention, executive functions, learning capacities, and visuospatial abilities. Approximately 50% of RBD patients present mild cognitive impairment. Moreover, RBD is also associated with cognitive decline in PD.

KEYWORDS:

Parkinson’s disease; REM sleep behavior disorder; cognition; dementia with Lewy bodies; elderly; mild cognitive impairment; sleep

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