By a News Reporter-Staff News Editor at Health & Medicine Week -- Current study results on Neurodegenerative Diseases have been published. According to news reporting originating in Beijing, People's Republic of China, by NewsRx journalists, research stated, "Recent neuroimaging studies have shown that the cognitive and memory decline in patients with Alzheimer's disease (AD) is coupled with abnormal functions of focal brain regions and disrupted functional connectivity between distinct brain regions, as well as losses in small-world attributes. However, the causal interactions among the spatially isolated, but functionally related, resting state networks (RSNs) are still largely unexplored."
The news reporters obtained a quote from the research from the Institute of Automation, "In this study, we first identified eight RSNs by independent components analysis from resting state functional MRI data of 18 patients with AD and 18 age-matched healthy subjects. We then performed a multivariate Granger causality analysis (mGCA) to evaluate the effective connectivity among the RSNs. We found that patients with AD exhibited decreased causal interactions among the RSNs in both intensity and quantity relative to normal controls. Results from mGCA indicated that the causal interactions involving the default mode network and auditory network were weaker in patients with AD, whereas stronger causal connectivity emerged in relation to the memory network and executive control network. Our findings suggest that the default mode network plays a less important role in patients with AD. Increased causal connectivity of the memory network and self-referential network may elucidate the dysfunctional and compensatory processes in the brain networks of patients with AD."
According to the news reporters, the research concluded: "These preliminary findings may provide a new pathway towards the determination of the neurophysiological mechanisms of AD."
For more information on this research see: Investigation of the effective connectivity of resting state networks in Alzheimer's disease: a functional MRI study combining independent components analysis and multivariate Granger causality analysis. Nmr In Biomedicine, 2012;25(12):1311-20. (Wiley-Blackwell - www.wiley.com/; Nmr In Biomedicine - onlinelibrary.wiley.com/journal/10.1002/(ISSN)1099-1492)
Our news correspondents report that additional information may be obtained by contacting Z. Liu, Intelligent Medical Research Center, State Key Laboratory of Management and Control for Complex System, Institute of Automation, Chinese Academy of Sciences, Beijing 100190, People's Taiwan. Additional authors for this research include Y. Zhang, L. Bai, H. Yan, R. Dai, C. Zhong, H. Wang, W. Wei, T. Xue, Y. Feng, Y. You and J. Tian (see also Neurodegenerative Diseases).
Keywords for this news article include: Asia, Beijing, Dementia, Tauopathies, Brain Diseases, Machine Learning, Alzheimer Disease, Granger Causality, Emerging Technologies, People's Republic of China, Neurodegenerative Diseases, Central Nervous System Diseases.
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