Inferior mesentric plexus

The inner plexus is the main control for Gastrointestinal secretion and local blood flow. The myenteric plexus expands throughout the entire length of the gut as a straight chain of interconnected neurons. situated within the intestinal smooth muscle, the myenteric plexus concentrate on muscle control.

The inferior mesenteric plexus belongs to the aortic plexus, which is situated in front of the abdominal aorta and is responsible for the sympathetic supply of mesenteric, pelvic, and urogenital organs. It is supplied directly by the left-sided L2 lumbar splanchnic nerve.

The inferior mesenteric ganglia are the supply hindgut, the terminal or distal third of the transverse colon, the descending and sigmoid colon, and the upper two-thirds of the anorectal canal.

The myenteric plexus, also known as Auerbach’s plexus, is situated between the longitudinal and circular muscle layers of the esophagus, stomach, and small and large intestines. The submucosal plexus, also known as Meissner’s plexus, is situated in the submucosal area between the circular muscle and mucosa.

Gross anatomy
The inferior mesenteric vein drains the mesenteric passage of the hindgut (comprising of distal transverse, descending, and sigmoid colon). particularly, it drains the tributaries or branches of the sigmoid veins, the middle and left colic veins, as well as the superior rectal vein.

In mesenteric ischemia, a blockage or obstruction in an artery cuts off blood flow to a portion or region of the intestine. Mesenteric ischemia occurs when narrowed or obstructed arteries restrict or decreased blood flow to the small intestine. reduced blood flow can permanently damage the small intestine.

The inferior mesenteric vein is a continuation of the superior rectal vein, goes along with the inferior mesenteric artery, and normally drains into the splenic vein.

The inferior mesenteric artery supplies blood to the distal one-third of the transverse colon, descending colon, and proximal two-thirds of the rectum.

third lumbar vertebra
The inferior mesenteric artery gets arises from the abdominal aorta at the level of the third lumbar vertebra. It supplies the hindgut and it has four major branches called left colic, sigmoid, and superior rectal arteries.

The inferior mesenteric vein gets arises from the splenic vein posterior aspect to the midbody of the pancreas, before the junction of the superior mesenteric and the splenic vein.

The myenteric plexus
The myenteric plexus is situated in between the outer longitudinal and inner circular smooth muscle layers of the intestines or bowel. By stimulating these muscles, it controls motility along with the gastrointestinal tract.

The damage or any injury of the mesenteric plexus results in disorders of peristaltic movement, which can be a life-threatening condition (e.g. achalasia, Hirschsprung disease, gastroparesis, etc).

The mesentery is a fold of the membrane that attaches to the intestine or bowel to the abdominal wall and holds it in place.

Blood supply to the ascending and transverse colon is through the superior mesenteric artery. The descending colon, sigmoid colon, and superior rectum collect their blood from the inferior mesenteric artery, which gets arises from the aorta at the level of the third lumbar vertebral region.

A damaged or injury to the vagus nerve can’t send signals normally to the stomach muscles. This may cause food to remain in the stomach longer, rather than move into the small intestine or small bowel to be digested. The vagus nerve and its branches can be damaged or injured by the diseases, such as diabetes, or by any surgery to the stomach and small intestine.

Gastrin is the hormone produced by the stomach, which regulates gastric motility and the release of gastric acid.

Mechanical activities such as distension can initiate or set off an enterochromaffin cell–sensory afferent nerve pathway that predicts to the myenteric plexus to trigger or initiate ascending or descending interneurons, which in turn initiate excitatory or inhibitory motor neurons.

third lumbar vertebra
The inferior mesenteric artery gets arises from the abdominal aorta at the level of the third lumbar vertebra. It supplies the hindgut and it has four major branches called left colic, sigmoid, and superior rectal arteries.

The mesenteric plexus
The myenteric plexus is situated in between the outer longitudinal and inner circular smooth muscle layers of the intestines or bowel. By stimulating these muscles, it controls motility along with the gastrointestinal tract.

The inferior mesenteric vein gets originates from the splenic vein posterior aspect to the midbody of the pancreas, before the junction of the superior mesenteric and splenic vein.

The mesentery is a fold of the membrane that attaches the bowel to the abdominal wall and holds and supports it in place.

The myenteric plexus also termed Auerbach’s plexus, is situated between the longitudinal and circular muscle layers of the stomach, esophagus, and small and large intestines. The submucosal plexus also termed Meissner’s plexus is present in the submucosal area between the circular muscle and mucosa.