Trunk of the Vagus Nerve Posterior (Truncus Vagalis Posterior, Pna)

The trunk of the “Posterior Vagus Nerve” (Truncus Vagalis Posterior) is one of the main trunks of the vagus nerve, which is responsible for regulating the functioning of the internal organs and systems of the body. This nerve is important for maintaining homeostasis in the body, as it controls the functioning of the heart, lungs, gastrointestinal tract, liver and other organs.

The posterior trunk of the vagus nerve begins at the upper end of the spinal cord, where it connects with the superior trunk of the vagus nerve. It then travels through the thoracic and abdominal spine, where it connects with other nerves and organs.

One of the main functions of the posterior trunk of the vagus nerve is to control the functioning of the heart. It regulates heart rate and blood pressure, and is also responsible for conducting nerve impulses that control the functioning of the heart muscles.

Also, the posterior trunk of the vagus nerve is responsible for the functioning of the lungs, providing regulation of breathing and gas exchange in the body. It is also involved in the regulation of the gastrointestinal tract and liver, controlling the secretion of bile and digestive enzymes.

In general, the posterior trunk of the vagus nerve plays an important role in regulating the functioning of internal organs, which helps maintain body homeostasis and ensure the normal functioning of all body systems.