Inferior mesenteric plexus

Inferior Mesenteric Plexus

The celiac ganglia with the sympathetic plexuses of the abdominal viscera radiating from the ganglia. (Inferior mesenteric plexus labeled at center right.)

The Inferior Mesenteric Plexus is a part of the autonomic nervous system that supplies the large intestine and the rectum. It is a network of nerves that originates from the superior mesenteric plexus and the aortic plexus, and it is associated with the inferior mesenteric artery.

Anatomy

The inferior mesenteric plexus is located around the origin of the inferior mesenteric artery. It is formed by branches from the aortic plexus and the superior mesenteric plexus. The plexus is composed of both sympathetic and parasympathetic fibers.

Function

The inferior mesenteric plexus provides innervation to the descending colon, the sigmoid colon, the rectum, and the upper part of the anal canal. It plays a crucial role in the regulation of the digestive system, particularly in the control of the movements and secretions of the large intestine.

Clinical Significance

Disorders of the inferior mesenteric plexus can lead to various gastrointestinal problems, such as constipation, diarrhea, and irritable bowel syndrome. In addition, damage to the plexus during abdominal surgery can result in postoperative complications.

See Also

• Superior mesenteric plexus
• Aortic plexus
• Inferior mesenteric artery