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The vagus nerve (/ËveÉªÉ¡És/ VAY-gÉs), historically cited as the pneumogastric nerve, is the tenth cranial nerve or CN X, and interfaces with parasympathetic control of the heart, lungs and digestive tract. The vagus nerves are paired; however, they are normally referred to in the singular.
Specifically, the function of the vagus nerve is to relay signals between the brain and various body systems to regulate heart rate, speech, sweating, blood pressure, digestion, glucose production, and certain aspects of breathing. diagram showing the vagus nerve. The vagus nerve relays signals between the brain and various body systems to regulate blood pressure. The vagus nerve is involved in triggering the sweat glands to help regulate body temperature.