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Combining ICA and Granger causality: A novel tool for investigation of brain dynamics and brain oscillations using fNIRS measurements
Zhen Yuan
2014
Conference NameConference on Optical Techniques in Neurosurgery, Neurophotonics, and Optogenetics
Source PublicationOPTICAL TECHNIQUES IN NEUROSURGERY, NEUROPHOTONICS, AND OPTOGENETICS
Volume8928
Conference DateFEB 01-04, 2014
Conference PlaceSan Francisco, CA
Abstract

Identifying directional influences in neural circuits from functional near infrared spectroscopy (fNIRS) recordings presents one of the main challenges for understanding brain dynamics. In this study a new strategy that combines Granger causality mapping (GCM) and independent component analysis (ICA) is proposed to reveal complex neural network dynamics underlying cognitive processes with fNIRS measurements. The GCM-ICA algorithm implements the following two procedures: (i) extraction of the region of interests (ROIs) of cortical activations by ICA, and (ii) estimation of the direct causal influences in local brain networks using Granger causality among voxels of ROIs. Our results show the use of GCM in conjunction with ICA is able to effectively capture the brain network dynamics in time-frequency domain with significantly reduced computational cost. We thus suggest that the GCM-ICA technique is a potentially valuable tool that could be used for the investigation of directional causality influences of brain network dynamics in biophotonics fields.

KeywordBrain Networks Connectivity Analysis Fnirs Granger Causality Ica
DOI10.1117/12.2033212
URLView the original
Indexed ByCPCI
Language英语
WOS Research AreaMicroscopy ; Optics ; Radiology, Nuclear Medicine & Medical Imaging ; Spectroscopy
WOS SubjectMicroscopy ; Optics ; Radiology, Nuclear Medicine & Medical Imaging ; Spectroscopy
WOS IDWOS:000337576500009
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeConference paper
CollectionFaculty of Health Sciences
INSTITUTE OF COLLABORATIVE INNOVATION
AffiliationUniversity of Macau, Bioimaging Core, Faculty of Health Sciences, Macau SAR, China
First Author AffilicationFaculty of Health Sciences
Recommended Citation
GB/T 7714
Zhen Yuan. Combining ICA and Granger causality: A novel tool for investigation of brain dynamics and brain oscillations using fNIRS measurements[C],2014.
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