Preservation of Septo-Hippocampal Theta Oscillations via Cholinergic Protection Underlies Cognitive Recovery After Physical Exercise Post-Cardiac Arrest

This study is the first to directly implicate PE-induced cholinergic neuron preservation in the reengagement of septo-hippocampal circuitry and cognitive recovery post cardiac arrest. Rather than relying on hippocampal cell survival, the observed memory improvements appear to stem from reinstated interregional theta synchrony. These findings define a novel mechanistic pathway for promoting functional recovery via targeted circuit-level rehabilitation after ischemic brain injury.