Tuesday, June 21, 2011

Anterior Vagal Trunk

The anterior vagal trunk is a branch of the left vagus nerve (CN X) which innervates the ventral surface of the stomach. Although it is composed mainly of fibers from the left vagus, it also contains a few fibers from the right vagus. The anterior vagal trunk is situated on the anterior surface of the esophagus and stomach in the esophageal hiatus of the diaphragm, giving off gastric and hepatic branches. The right vagus nerve becomes the posterior vagal trunk and innervates the posterior surface of the stomach, and sends a branch into the celiac plexus.