Significant feed-forward connectivity revealed by high frequency components of BOLD fMRI signals

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題名:	Significant feed-forward connectivity revealed by high frequency components of BOLD fMRI signals
作者:	郭文瑞;Lin, Fa-Hsuan;Chu, Ying-Hua;Hsu, Yi-Cheng;Lin, Jo-Fu Lotus;Tsai, Kevin W.-K.;Tsai, Shang-Yueh;Kuo, Wen-Jui
貢獻者:	生醫理工學院認知神經科學研究所
關鍵詞:	Adult;Behavior;Brain - physiology;Causality;Connectome - methods;Data Interpretation, Statistical;Decomposition;Economic models;Granger;Humans;Magnetic Resonance Imaging - methods;Methods;NMR;Nuclear magnetic resonance;Psychomotor Performance - physiology;Spectral decomposition;Studies;Visuomotor
日期:	2015-11-01
上傳時間:	2026-04-23 14:37:44 (UTC+8)
出版者:	Academic Press Inc.;United States: Elsevier Inc
摘要:	摘要： Granger causality analysis has been suggested as a method of estimating causal modulation without specifying the direction of information flow a priori. Using BOLD-contrast functional MRI (fMRI) data, such analysis has been typically implemented in the time domain. In this study, we used magnetic resonance inverse imaging, a method of fast fMRI enabled by massively parallel detection allowing up to 10Hz sampling rate, to investigate the causal modulation at different frequencies up to 5Hz. Using a visuomotor two-choice reaction-time task, both the spectral decomposition of Granger causality and isolated effective coherence revealed that the BOLD signal at frequency up to 3Hz can still be used to estimate significant dominant directions of information flow consistent with results from the time-domain Granger causality analysis. We showed the specificity of estimated dominant directions of information flow at high frequencies by contrasting causality estimates using data collected during the visuomotor task and resting state. Our data suggest that hemodynamic responses carry physiological information related to inter-regional modulation at frequency higher than what has been commonly considered. •Causal modulation in human brain was estimated up to 5Hz using fMRI data.•The BOLD signal at 3Hz still gives consistent information flow estimates.•BOLD signals carry inter-regional modulation info at frequency higher than 1Hz. 其他題名： Neuroimage 出版者： United States: Elsevier Inc 出版日期： 2015-11-01 出處： NeuroImage, 2015-11, Vol.121, p.69-77 版權： 2015 Elsevier Inc. 版權： Copyright © 2015 Elsevier Inc. All rights reserved. 版權： Copyright Elsevier Limited Nov 1, 2015 識別號： ISSN: 1053-8119 識別號： ISSN: 1095-9572 識別號： EISSN: 1095-9572 識別號： DOI: 10.1016/j.neuroimage.2015.07.036 識別號： PMID: 26208871
顯示於類別:	[認知與神經科學研究所 ] 期刊論文

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