A New Method on Construction of Brain Effective Connectivity Based on Functional Magnetic Resonance Imaging

Table 1

Values of effective connections (ECs) obtained by EC-BP and GCA.

Our method	X1	X2	X3	X4	GCA	X1	X2	X3	X4
X1	1	0.721	0.723	0.727	X1	NaN	0.016	0.012	0.012
X2	0.528	1	0.524	0.527	X2	0.0241	NaN	0.028	0.022
X3	0.332	0.327	1	0.332	X3	0.003	0.010	NaN	0.001
X4	0.136	0.129	0.130	1	X4	0.001	0.000	0.000	NaN

The EC value in this table represents the causal relationship from the corresponding row to the corresponding column. X1, X2, X3, and X4 are four time sequences. EC-BP: effective connectivity based on back-propagation neural network method; GCA: Granger causality analysis.