Inferior ganglion of vagus nerve

Anatomical structure of the vagus nerve

Diagram of the vagus nerve, showing the inferior ganglion

The inferior ganglion of the vagus nerve, also known as the nodose ganglion, is a sensory ganglion located in the vagus nerve (cranial nerve X). It is situated below the jugular foramen and is responsible for transmitting sensory information from the viscera to the central nervous system.

Anatomy

The inferior ganglion is larger than the superior ganglion of the vagus nerve and is located just below it. It is found at the level of the first cervical vertebra and is closely associated with the internal jugular vein and the internal carotid artery.

Structure

The ganglion contains the cell bodies of sensory neurons that convey information from the pharynx, larynx, thoracic organs, and abdominal organs. These neurons are pseudounipolar neurons, meaning they have a single process that bifurcates into a peripheral and a central branch.

Function

The inferior ganglion of the vagus nerve plays a crucial role in the parasympathetic nervous system. It transmits sensory information such as baroreception and chemoreception from the aortic arch and carotid body, as well as visceral sensations from the gastrointestinal tract.

Clinical significance

Damage to the inferior ganglion can result in loss of sensation in the areas supplied by the vagus nerve, leading to conditions such as dysphagia, dysphonia, and loss of gag reflex.

Related pages

• Vagus nerve
• Superior ganglion of the vagus nerve
• Parasympathetic nervous system
• Cranial nerves