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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.
Some of the main functions of the Vagus Nerve include, 1  Breathing. 2  Speech. 3  Sweating. Helping in keeping the larynx open during breathing.  Monitoring and regulating the 1  heartbeat. Informing the brain of the food that is ingested and food that has been digested.  The Vagus Nerve performs the major function of emptying the gastric region of food.