Spinal vascular endothelial growth factor (VEGF) and erythropoietin (EPO) induced phrenic motor facilitation after repetitive acute intermittent hypoxia

► We confirm that cervical spinal vascular endothelial growth factor (VEGF) elicits phrenic motor facilitation. ► We confirm that cervical spinal erythropoietin (EPO) elicits phrenic motor facilitation. ► Four weeks of repetitive acute intermittent hypoxia does not enhance VEGF or EPO induced phrenic motor facilitation.