标题:
静息态下基于格兰杰因果分析的ACT-R网络有效连接变化研究Change of Effective Connective of the ACT-R Network in the Resting State Based on Granger Causality Analysis
作者:
李川, 周海燕, 周军, 熊玉琨, 秦裕林, 钟宁
关键字:
格兰杰因果分析, 静息态, ACT-R脑网络, 有效连接Granger Causality Analysis, Resting States, ACT-R Model Network, Effective Connectivity
期刊名称:
《Advances in Psychology》, Vol.5 No.3, 2015-03-24
摘要:
近年来，脑功能网络的组织促进了人类大脑的理解。为进一步探究人类大脑功能网络的变化，本研究主要使用有效连接方法对比任务前、后静息态fMRI数据变化。区别于以往大脑整体网络的改变，研究使用基于格兰杰因果分析(GCA)的有效连接方法针对ACT-R脑网络内部开展。结果表明：短暂认知任务前后，ACT-R网络模型内部有效连接发生较大改变；在后静息态，程序性模块(Cad)作为一个主要信息接收点接收来自其他模块的因果影响。Recently, the organization of functional network promotes the understanding of the human brain. To further explore the functional reorganization affected by a short-time cognitive performance in human brain, we used the method of Granger causality analysis (GCA) to compare two resting fMRI data before and after a problem solving task. Distinguished from the view of the brain network as a whole in previous studies, GCA focused on the internal organization within a brain network. The re-sults showed that taking the ACT-R network as an example, the effective connectivity within the ACT-R network significantly changed after the brief cognitive task. In the post-resting state, proce-dural module (Cad) acted as a main information receiver received influence from other modules.