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✅ Quantifying the influence of biophysical factors in shaping brain communication through remnant functional networks

science

Functional connectivity (FC) reflects brain wide communication crucial for cognition, yet the role of underlying biophysical factors, physical and molecular, in shaping FC remains unclear. We quantify the influence of physical factors, structural connectivity (SC) and spatial autocorrelation (DC), capturing anatomical wiring and distance between regions and molecular factors, gene expression similarity (GC) and neuroreceptor congruence (RC), capturing similarity in the neurobiological make up on the organizational features of fMRI derived resting state FC. We assess the impact of these factors on graph-theoretic and topological features, capturing both pairwise and higher order interactions between brain regions. We develop a simple test using remnant functional networks generated by selectively removing connections aligned with specific biophysical factors.

BioRxiv     Sep 15, 2024