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Comparison of the index of arterial cardiac reflex (ΔHR/ΔSAP, left) and the index of dynamic cerebral autoregulation, rate of regulation (RoR, right) for each subject (plots) and median (bars) of each parameter before and after melatonin administration. Melatonin did not affect index of arterial cardiac reflex and RoR before and 60 min after melatonin ingestion. ΔHR: the response in HR after thigh cuff release, ΔSAP: the reduction in SAP after thigh cuff release.
