Intermittent hypoxia (IH) in patients with obstructive sleep apnea (OSA) syndrome elicited neuron injury (especially in the hippocampus and cortex), contributing to cognitive dysfunction. This study investigated the effects and clarified the mechanisms of ETS domain-containing protein Elk-4 (ELK4) on the cognitive function and neuroinflammation of mice with IH. Mouse microglia BV2 cells were induced with IH by exposure to fluctuating O