Suspensory muscle of duodenum

Suspensory muscle of duodenum
The duodenum. The suspensory muscle of the duodenum attaches to the duodenojejunal flexure, shown.
The duodenum and jejunum depicted in situ. The suspensory muscle of the duodenum connects posteriorly to the duodenojejunal flexure, behind the pancreas, shown.
Details
System	Gastrointestinal
Origin	Connective tissue surrounding coeliac artery and superior mesenteric artery
Insertion	Third and fourth-parts of duodenum, duodenojejunal flexure
Nerve	Coeliac plexus, Superior mesenteric plexus
Actions	Facilitates movement of food; embryological role in fixating jejunum during gut rotation
Identifiers
Latin	musculus suspensorius duodeni, ligamentum suspensorium duodeni
TA98	A05.6.02.011
TA2	3781
FMA	20509
Anatomical terms of muscle [edit on Wikidata]

The suspensory muscle of duodenum (also known as suspensory ligament of duodenum, Treitz's muscle or ligament of Treitz^[1]) is a thin muscle connecting the junction between the duodenum and jejunum (the small intestine's first and second parts, respectively), as well as the duodenojejunal flexure to connective tissue surrounding the superior mesenteric and coeliac arteries. The suspensory muscle most often connects to both the third and fourth parts of the duodenum, as well as the duodenojejunal flexure, although the attachment is quite variable.

The suspensory muscle marks the formal division between the duodenum and the jejunum. This division is used to mark the difference between the upper and lower gastrointestinal tracts, which is relevant in clinical medicine as it may determine the source of gastrointestinal bleeding.

The suspensory muscle is derived from mesoderm and plays a role in the embryological rotation of the gut, by offering a point of fixation for the rotating gut. It is also thought to help digestion by widening the angle of the duodenojejunal flexure. Superior mesenteric artery syndrome is a rare abnormality caused by a congenitally short suspensory muscle.