Executive functions are impaired in patients with Parkinson's disease with visual hallucinations

Barnes, J. and Boubert, L. 2008. Executive functions are impaired in patients with Parkinson's disease with visual hallucinations. Journal of Neurology, Neurosurgery and Psychiatry. 79 (2), pp. 190-192.

TitleExecutive functions are impaired in patients with Parkinson's disease with visual hallucinations
AuthorsBarnes, J. and Boubert, L.
Abstract

Objectives: Although cognitive impairment has been identified as a risk factor for visual hallucinations (VHs),

more specific neuropsychological deficits underlying such

phenomena have not been established. Here, we investigate the link between executive dysfunction and the occurrence of VHs. Methods: We evaluated three groups—17 patients with

Parkinson’s disease (PD) with VHs, 20 patients with PD

without VHs and 20 age-matched controls—on a battery

of tests previously reported to evaluate executive

functions, namely tests of inhibitory ability, short-term

memory and working memory.

Results: Differences were found on tests of inhibitory

ability, for which the patient group with VHs showed

impairment when compared with the non-hallucinating

group.

Conclusions: Patients with PD with VHs have substantially

greater impairment of inhibitory ability than patients

without VHs. These findings support interactive models of

the genesis of visual hallucinations in PD.

JournalJournal of Neurology, Neurosurgery and Psychiatry
Journal citation79 (2), pp. 190-192
ISSN0022-3050
Year2008
PublisherBMJ
Digital Object Identifier (DOI)doi:10.1136/jnnp.2007.116202
Publication dates
Published2008

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