TY - RPRT TI - Time-Varying Directed Interactions in Functional Brain Networks: Modeling and Validation AU - Xu, N. AU - Zhang, X. AU - Pan, W.-J. AU - Smith, J. L. AU - Schumacher, E. H. AU - Allen, J. W. AU - Calhoun, V. D. AU - Keilholz, S. D. PY - 2026 DO - 10.64898/2026.02.15.706049 UR - https://www.biorxiv.org/content/10.64898/2026.02.15.706049v1 ID - 10.64898/2026.02.15.706049 ER -