Posterior vagal trunk

Posterior Vagal Trunk

The posterior vagal trunk is a branch of the vagus nerve that contributes to the esophageal plexus.

The Posterior Vagal Trunk is a branch of the vagus nerve, which is the tenth cranial nerve and a key part of the autonomic nervous system. This nerve trunk plays a significant role in the innervation of the abdominal organs.

Anatomy

The posterior vagal trunk is formed in the thorax from the right vagus nerve. It descends on the esophagus and passes through the diaphragm via the esophageal hiatus. It provides parasympathetic fibers to the abdominal organs.

Function

The posterior vagal trunk carries parasympathetic fibers to the stomach, liver, gallbladder, pancreas, small intestine, and the proximal half of the large intestine. It also carries sensory fibers from these organs back to the brain.

Clinical Significance

Understanding the anatomy and function of the posterior vagal trunk is crucial in several surgical procedures, including vagotomy, a procedure used to treat peptic ulcers by reducing acid secretion in the stomach.

See Also

• Vagus nerve
• Anterior vagal trunk
• Esophageal plexus
• Vagotomy