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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.
Vagus Nerve. The vagus nerve is the tenth cranial nerve (CN X) and is responsible for parasymapthetic nerve supply to the stomach. It enters the abdomen through the esophageal hiatus in the diaphragm. The anterior vagal trunk supplies the anterior aspect (front) of the stomach and is derived from the left vagus nerve. The posterior vagal trunk supplies the posterior aspect (back) of the stomach and to a lesser extent the anterior aspect of the stomach and is derived from the right vagus nerve.