Estimate the connectivity strength and duration of the information flow from one signal to the other.
1. Nan Xu, R Nathan Spreng, and Peter C Doerschuk, "Initial validation for the estimation of resting-state fMRI effective connectivity by a generalization of the correlation approach." Frontiers in Neuroscience, 11:271, 2017.
2. Nan Xu, R Nathan Spreng, Peter C Doerschuk, "Directed interactivity of large-scale brain networks: Introducing a new method for estimating resting-state effective connectivity MRI'.' The 21st IEEE International Conference on Image Processing, 2014 (ICIP 2014)
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