Abstract:
BACKGROUND AND PURPOSE:Recent studies have demonstrated that Alzheimer's disease (AD) and subcortical vascular dementia (SVaD) have white matter (WM) microstructural changes. However, previous studies on AD and SVaD rarely eliminated the confounding effects of patients with mixed Alzheimer's and cerebrovascular disease pathologies. Therefore, our aim was to evaluate the divergent topography of WM microstructural changes in patients with pure AD and SVaD. METHODS:Patients who were clinically diagnosed with AD and SVaD were prospectively recruited. Forty AD patients who were Pittsburgh compound B (PiB) positive [PiB(+) AD] without WM hyperintensities and 32 SVaD patients who were PiB negative [PiB(-) SVaD] were chosen. Fifty-six cognitively normal individuals were also recruited (NC). Tract-based spatial statistics of diffuse tensor imaging were used to compare patterns of fractional anisotropy (FA) and mean diffusivity (MD). RESULTS:Compared with the NC group, the PiB(+) AD group showed decreased FA in the bilateral frontal, temporal and parietal WM regions and the genu and splenium of the corpus callosum as well as increased MD in the left frontal and temporal WM region. PiB(-) SVaD patients showed decreased FA and increased MD in all WM regions. Direct comparison between PiB(+) AD and PiB(-) SVaD groups showed that the PiB(-) SVaD group had decreased FA across all WM regions and increased MD in all WM regions except occipital regions. CONCLUSION:Our findings suggest that pure AD and pure SVaD have divergent topography of WM microstructural changes including normal appearing WM.
journal_name
Eur J Neuroljournal_title
European journal of neurologyauthors
Kim YJ,Kwon HK,Lee JM,Kim YJ,Kim HJ,Jung NY,Kim ST,Lee KH,Na DL,Seo SWdoi
10.1111/ene.12645subject
Has Abstractpub_date
2015-04-01 00:00:00pages
709-16issue
4eissn
1351-5101issn
1468-1331journal_volume
22pub_type
杂志文章abstract::This study is aimed at assessing the prevalence and features of psychotic symptoms in a sample of 180 patients with Alzheimer's disease (AD). Sixty-four patients (35.5% of the sample) showed one or more psychotic symptoms. The presence of these symptoms correlated with the severity of the patients' cognitive impairmen...
journal_title:European journal of neurology
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journal_title:European journal of neurology
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