Suspensory muscle of duodenum
Suspensory muscle of duodenum | |
---|---|
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] |
The suspensory muscle of duodenum (also known as suspensory ligament of duodenum, Treitz's muscle or ligament of Treitz
The suspensory muscle marks the formal division between the duodenum and the jejunum. This division is used to mark the difference between the
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.
Structure
The
Variation
Considerable
According to some authors, who use the original description by Treitz, the muscle may be divided into two sections: a ligamentous portion attaching the
Function
The ligament contains a slender band of skeletal muscle from the diaphragm and a fibromuscular band of smooth muscle from the horizontal and ascending parts of the duodenum. When it contracts, by virtue of connections to the third and fourth parts of the duodenum, the suspensory muscle of the duodenum widens the angle of the duodenojejunal flexure, allowing movement of the intestinal contents.[1][5]
Embryology
Embryologically, the suspensory muscle of the duodenum is derived from mesoderm. It plays an important role in the embryological rotation of the small intestine as the superior retention band.[1][3]: 48
Clinical significance
This ligament is an important
During a
Superior mesenteric artery syndrome (SMA) is an extremely rare life-threatening condition that can either be congenital and chronic, or induced and acute. SMA Syndrome is characterised by compression of the duodenum between the abdominal aorta and the superior mesenteric artery, and may—when congenital—result from a short suspensory muscle. One surgical treatment is Strong's operation, which involves cutting the suspensory muscle, though this is not often carried out.[8]
History
The suspensory muscle of the duodenum was first named in 1853 by
Additional images
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Depiction of the origin of the suspensory muscle, from the fibres of the rightdiaphragmatic crus
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Suspensory muscle of the duodenum or muscle of Treitz seen in a ventral view.
References
- ^ S2CID 4381790.
- ISBN 978-0-19-856978-7. Retrieved 1 July 2010.: 511
- ^ ISBN 81-87504-95-1.
- ^ S2CID 11858260.
- ISBN 978-0-7817-7525-0.
- S2CID 6971032.
- PMID 19636494.
- S2CID 40701151.