Lumbocostal arch: Difference between revisions
CSV import |
CSV import |
||
| Line 29: | Line 29: | ||
[[Category:Abdomen]] | [[Category:Abdomen]] | ||
{{anatomy-stub}} | {{anatomy-stub}} | ||
{{No image}} | |||
Revision as of 22:27, 10 February 2025
Lumbocostal arch (also known as the lumbar costal arch or arcuate ligament) is a structure in the human anatomy that is part of the posterior abdominal wall. It is a fibrous arch that connects the lower border of the diaphragm to the upper border of the quadratus lumborum muscle and the psoas major muscle.
Structure
The lumbocostal arch is a fibrous arch that is formed by the aponeurosis of the transversus abdominis muscle. It is attached to the lower border of the diaphragm and the upper border of the quadratus lumborum muscle and the psoas major muscle. The lumbocostal arch is divided into two parts: the medial lumbocostal arch and the lateral lumbocostal arch.
Medial Lumbocostal Arch
The medial lumbocostal arch is attached to the upper border of the psoas major muscle. It is also known as the medial arcuate ligament.
Lateral Lumbocostal Arch
The lateral lumbocostal arch is attached to the upper border of the quadratus lumborum muscle. It is also known as the lateral arcuate ligament.
Function
The lumbocostal arch serves as a point of attachment for the diaphragm, which is the primary muscle involved in respiration. It also provides a passageway for the aorta, the azygos vein, and the thoracic duct to pass from the thorax to the abdomen.
Clinical Significance
The lumbocostal arch is an important landmark in surgical procedures involving the posterior abdominal wall. Its location and structure can be affected by conditions such as diaphragmatic hernia and abdominal aortic aneurysm.
