Visual hallucinations and altered visual information processing in Parkinson disease and dementia with Lewy bodies
Identifieur interne : 001915 ( Main/Exploration ); précédent : 001914; suivant : 001916Visual hallucinations and altered visual information processing in Parkinson disease and dementia with Lewy bodies
Auteurs : Akira Kurita [Japon] ; Maiko Murakami [Japon] ; Satoshi Takagi [Japon] ; Masato Matsushima [Japon] ; Masahiko Suzuki [Japon]Source :
- Movement Disorders [ 0885-3185 ] ; 2010-01-30.
Descripteurs français
- Pascal (Inist)
English descriptors
- KwdEn :
- Aged, Aged, 80 and over, Alzheimer Disease (physiopathology), Alzheimer Disease (psychology), Auditory Perception, Brain (physiopathology), Brain Mapping, Cognition, Dementia (diagnosis), Dementia (physiopathology), Dementia (psychology), Discrimination (Psychology), Electroencephalography, Event evoked potential, Evoked Potentials, Female, Hallucinations (physiopathology), Hallucinations (psychology), Humans, Information processing, Lewy Body Disease (physiopathology), Lewy Body Disease (psychology), Lewy body dementia, Male, Middle Aged, Nervous system diseases, Neuropsychological Tests, Parkinson Disease (physiopathology), Parkinson Disease (psychology), Parkinson disease, Parkinson's disease, Psychiatric Status Rating Scales, Psychomotor Performance, Reaction Time, Visual Perception, Visual hallucination, Visual information, dementia with Lewy bodies, event‐related potentials, information processing, visual hallucinations.
- MESH :
- diagnosis : Dementia.
- physiopathology : Alzheimer Disease, Brain, Dementia, Hallucinations, Lewy Body Disease, Parkinson Disease.
- psychology : Alzheimer Disease, Dementia, Hallucinations, Lewy Body Disease, Parkinson Disease.
- Aged, Aged, 80 and over, Auditory Perception, Brain Mapping, Cognition, Discrimination (Psychology), Electroencephalography, Evoked Potentials, Female, Humans, Male, Middle Aged, Neuropsychological Tests, Psychiatric Status Rating Scales, Psychomotor Performance, Reaction Time, Visual Perception.
Abstract
Visual hallucinations (VHs) are common in dementia with Lewy bodies (DLB) and Parkinson's disease with dementia (PDD), while auditory hallucinations are rare. To neurophysiologically investigate the pathophysiology of VHs in these disorders, we studied event‐related potentials (ERPs) of DLB, PDD, and Alzheimer's disease (AD) patients. We compared visual and auditory ERP latencies among PDD patients with and without VHs (PDD‐H: 11, PDD‐N: 6), DLB patients (24), and AD patients (21). To elicit visual and auditory ERPs, a facial discrimination paradigm and a conventional auditory odd‐ball paradigm, respectively, were used. The mean visual P3 latencies in the PDD‐H and DLB groups were significantly longer than that in the AD group, while the mean auditory P3 latencies in all four patient groups were comparable. The mean visual P2 latencies in the PDD‐N, PDD‐H, and DLB groups were significantly longer than that in the control group. Our findings suggest that visual cognitive functions are selectively impaired in hallucinatory patients with DLB and PDD. VHs may be associated in part with predominant visual cognitive impairments attributable to PDD and DLB pathologies. Our findings also suggest that the impairments occur at the early stage of facial information processing. © 2010 Movement Disorder Society
Url:
DOI: 10.1002/mds.22919
Affiliations:
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Le document en format XML
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<term>Alzheimer Disease (physiopathology)</term>
<term>Alzheimer Disease (psychology)</term>
<term>Auditory Perception</term>
<term>Brain (physiopathology)</term>
<term>Brain Mapping</term>
<term>Cognition</term>
<term>Dementia (diagnosis)</term>
<term>Dementia (physiopathology)</term>
<term>Dementia (psychology)</term>
<term>Discrimination (Psychology)</term>
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<term>Hallucinations (psychology)</term>
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<front><div type="abstract" xml:lang="en">Visual hallucinations (VHs) are common in dementia with Lewy bodies (DLB) and Parkinson's disease with dementia (PDD), while auditory hallucinations are rare. To neurophysiologically investigate the pathophysiology of VHs in these disorders, we studied event‐related potentials (ERPs) of DLB, PDD, and Alzheimer's disease (AD) patients. We compared visual and auditory ERP latencies among PDD patients with and without VHs (PDD‐H: 11, PDD‐N: 6), DLB patients (24), and AD patients (21). To elicit visual and auditory ERPs, a facial discrimination paradigm and a conventional auditory odd‐ball paradigm, respectively, were used. The mean visual P3 latencies in the PDD‐H and DLB groups were significantly longer than that in the AD group, while the mean auditory P3 latencies in all four patient groups were comparable. The mean visual P2 latencies in the PDD‐N, PDD‐H, and DLB groups were significantly longer than that in the control group. Our findings suggest that visual cognitive functions are selectively impaired in hallucinatory patients with DLB and PDD. VHs may be associated in part with predominant visual cognitive impairments attributable to PDD and DLB pathologies. Our findings also suggest that the impairments occur at the early stage of facial information processing. © 2010 Movement Disorder Society</div>
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