
Proceedings Paper
Combining ICA and Granger causality: a novel tool for investigation of brain dynamics and brain oscillations using fNIRS measurementsFormat | Member Price | Non-Member Price |
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Paper 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.
Paper Details
Date Published: 24 March 2014
PDF: 12 pages
Proc. SPIE 8928, Optical Techniques in Neurosurgery, Neurophotonics, and Optogenetics, 89280I (24 March 2014); doi: 10.1117/12.2033212
Published in SPIE Proceedings Vol. 8928:
Optical Techniques in Neurosurgery, Neurophotonics, and Optogenetics
Henry Hirschberg M.D.; E. Duco Jansen; Samarendra K. Mohanty; Nitish V. Thakor; Qingming Luo; Steen J. Madsen, Editor(s)
PDF: 12 pages
Proc. SPIE 8928, Optical Techniques in Neurosurgery, Neurophotonics, and Optogenetics, 89280I (24 March 2014); doi: 10.1117/12.2033212
Show Author Affiliations
Zhen Yuan, Univ. of Macau (Macao, China)
Published in SPIE Proceedings Vol. 8928:
Optical Techniques in Neurosurgery, Neurophotonics, and Optogenetics
Henry Hirschberg M.D.; E. Duco Jansen; Samarendra K. Mohanty; Nitish V. Thakor; Qingming Luo; Steen J. Madsen, Editor(s)
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