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Stimulation of the nasopharyngeal reflex (2 ml of water passed through the nose) evoked rises in SNA and MAP in a control rat (A) and a rat exposed to CIH (B). The rises in SNA were exaggerated in rats exposed to CIH (n = 22) compared to control rats (n = 17, C). *Significantly different from control rats, P < 0.05, unpaired t test.
