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Neuroanatomical substrates of visual hallucinations in patients with non-demented Parkinson's disease

Title
 Neuroanatomical substrates of visual hallucinations in patients with non-demented Parkinson's disease 
Authors
 Soojeong Shin ; Ji Eun Lee ; Phil Hyu Lee ; Young Ho Sohn ; Mun-Kyung Sunwoo ; Jin Yong Hong 
Issue Date
2012
Journal Title
 Journal of Neurology Neurosurgery and Psychiatry 
ISSN
 0022-3050 
Citation
 Journal of Neurology Neurosurgery and Psychiatry, Vol.83(12) : 1155~1161, 2012 
Abstract
BACKGROUND: Visual hallucinations (VH), which are common in patients with Parkinson's disease (PD), lead to increased disability and are a significant predictor of the development of dementia. However, the neuroanatomical basis for VH in non-demented PD patients remains controversial. METHODS: A total of 110 patients with PD were classified into PD with VH (n=46) and PD without VH (n=64) groups, depending on the presence of VH assessed by the caregiver-based structured interview of the Neuropsychiatric Inventory. We performed voxel-based morphometry (VBM) for grey matter (GM) volume and a region-of-interest-based volumetric analysis of the substantia innominata (SI) between two groups. RESULTS: The comprehensive neuropsychological assessment showed that PD patients with VH showed more severe cognitive deficits in delayed visual memory and frontal executive functions compared with those without VH. A VBM analysis revealed that PD patients with VH had significantly lower GM volume in the right orbitofrontal, left temporal and left thalamic areas compared with those without VH. The normalised SI volume was significantly reduced in PD patients with VH compared with those without VH (1.28 ± 0.22 vs 1.41 ± 0.25, p=0.005). CONCLUSIONS: The present study demonstrates that non-demented PD patients with VH exhibited a smaller volume in the frontal, temporal and thalamic areas as well as the SI, suggesting that PD hallucinators may have distinctive neuroanatomical bases relative to PD non-hallucinators.
URI
http://ir.ymlib.yonsei.ac.kr/handle/22282913/90991
DOI
10.1136/jnnp-2012-303391
Appears in Collections:
1. 연구논문 > 1. College of Medicine > Dept. of Neurology
Yonsei Authors
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Link
 http://jnnp.bmj.com/content/83/12/1155.long
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