Diminished ascending drive in transdiagnostic anhedonia shifts the cortico-subcortical hierarchy away from bottom-up dominance
This study reveals that transdiagnostic anhedonia is characterized by a reorganization of the cortico-subcortical hierarchy driven by a disproportionate weakening of ascending subcortical-to-cortical signals, which shifts the network balance from bottom-up dominance to a more balanced state and reinterprets prior findings of prefrontal over-recruitment as a consequence of diminished input rather than enhanced output.