Table S1.

Correlation between node degree and univariate signal properties

	Node degree inflow		Node degree outflow
Signal property	Correlation	P value	Correlation	P value
Signal variance	0.054	0.51	0.077	0.34
Spatial filter norm	0.096	0.23	0.12	0.15
SNR	−0.097	0.23	0.032	0.69