Mild cognitive impairment in rapid eye movement sleep behavior disorder and Parkinson's disease.

Abstract:

OBJECTIVE:To investigate the frequency and subtypes of mild cognitive impairment (MCI) in idiopathic rapid eye movement sleep behavior disorder (RBD) and Parkinson's disease (PD) in association with RBD. METHODS:One hundred and twelve subjects without dementia or major depression including 32 idiopathic RBD patients, 22 PD patients with polysomnography-confirmed RBD, 18 PD patients without RBD, and 40 healthy control subjects, underwent a comprehensive neuropsychological evaluation. We compared the proportion of patients with MCI between groups using standard diagnostic criteria. RESULTS:MCI was found in 50% of idiopathic RBD patients and 73% of PD patients with RBD. In contrast, only 11% of PD patients without RBD and 8% of control subjects had MCI. The presence of MCI was significantly greater in idiopathic RBD patients and PD patients with RBD than in PD patients without RBD and control subjects. PD patients with RBD also performed worse than idiopathic RBD patients on neuropsychological tests assessing visuoconstructional and visuoperceptual abilities. INTERPRETATION:In both its association with PD and its idiopathic form, RBD is an important risk factor for MCI. Except for visuoconstructional and visuoperceptual problems, RBD may be an important determinant of cognitive impairment in PD. Ann Neurol 2009;66:39-47.

journal_name

Ann Neurol

journal_title

Annals of neurology

authors

Gagnon JF,Vendette M,Postuma RB,Desjardins C,Massicotte-Marquez J,Panisset M,Montplaisir J

doi

10.1002/ana.21680

subject

Has Abstract

pub_date

2009-07-01 00:00:00

pages

39-47

issue

1

eissn

0364-5134

issn

1531-8249

journal_volume

66

pub_type

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