Estimation of high-dimensional brain connectivity from FMRI data using factor modeling

• Main Authors: Shaikh Salleh, Sheikh Hussein, Ting, Chee-Ming, Seghouane, Abd. Krim, Mohd. Noor, A. B.
• Format: Article
• Published: IEEE Xplore Digital Library 2014
• Subjects: QH Natural history
• Online Access: http://eprints.utm.my/id/eprint/52739/; http://dx.doi.org/10.1109/SSP.2014.6884578

We consider identifying effective connectivity of brain networks from fMRI time series. The standard vector autoregressive (VAR) models fail to give reliable network estimates, typically involving very large number of nodes. This paper adopts a dimensionality reduction approach based on factor model...