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Cortical Hubs and Subcortical Cholinergic Pathways as Neural Substrates of Poststroke Dementia

Cited 34 time in Web of Science Cited 38 time in Scopus
Authors

Lim, Jae-Sung; Kim, Nayoung; Jang, Min Uk; Han, Moon-Ku; Kim, SangYun; Baek, Min Jae; Jang, Myung Suk; Ban, Byeolnim; Kang, Yeonwook; Kim, Dong-Eog; Lee, Ji Sung; Lee, Juneyoung; Lee, Byung-Chul; Yu, Kyung-Ho; Black, Sandra E.; Bae, Hee-Joon

Issue Date
2014-04
Publisher
Lippincott Williams & Wilkins Ltd.
Citation
Stroke, Vol.45 No.4, pp.1069-1076
Abstract
Background and Purpose A role of neural networks in the development of poststroke dementia has not been clearly established. We hypothesized that stroke-mediated disruption of subcortical cholinergic pathway or large-scale neural networks contributes to poststroke dementia. Methods A matched case-control study was conducted in a predetermined cohort with acute ischemic stroke. Cases were defined as newly developed dementia diagnosed >3 months after stroke using the Korean Vascular Cognitive Impairment Harmonization Standards. Each case was matched to 2 controls for age, education, and initial stroke severity. The Cholinergic Pathways HyperIntensities Scale was applied with some modifications to characterize disruption of cholinergic pathways by acute stroke lesions. Involvement of major cortical hub locations of the default mode network, central executive network, and salience network was also investigated. Results After matching, 38 cases and 66 matched controls were included. Cholinergic Pathways HyperIntensities Scale scores were significantly higher in cases than in controls (2.22.9 versus 0.9 +/- 1.4). Acute ischemic lesions affecting the default mode and central executive networks were more frequently observed in cases compared with controls (36.8% versus 7.6% and 26.3% versus 6.1%, respectively). These findings remained significant in the multiple logistic regression models adjusted for various sets of potential confounders. Lesion location analysis revealed that cases were more likely to have acute lesions in the left corona radiata, hippocampal formation, and posterior parietal cortex. Conclusions Disruption of cholinergic pathways and major hubs of large-scale neural networks might contribute to newly developed dementia after acute ischemic stroke.
ISSN
0039-2499
URI
https://hdl.handle.net/10371/207456
DOI
https://doi.org/10.1161/STROKEAHA.113.004156
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  • College of Medicine
  • Department of Medicine
Research Area 뇌경색, 뇌졸중, 혈관성 인지장애 및 치매

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