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The circulation after ligature of the internal iliac artery is carried on by the anastomoses of: [8] the iliolumbar artery (from the posterior division of the internal iliac artery) with the last lumbar artery (from the aorta)
The iliolumbar artery is the first branch of the posterior trunk of the internal iliac artery. [1] It turns upward behind the obturator nerve and the external iliac artery and vein, to the medial border of the psoas major muscle, behind which it divides into: Lumbar branch of iliolumbar artery; Iliac branch of iliolumbar artery
The right common iliac vein is virtually vertical and lies behind and then lateral to its artery. Each common iliac vein receives iliolumbar veins , while the left also receives the median sacral vein which lies on the right of the corresponding artery.
The iliolumbar ligament strengthens the lumbosacral joint assisted by the lateral lumbosacral ligament, and, like all other vertebral joints, by the posterior and anterior longitudinal ligaments, the ligamenta flava, and the interspinous and supraspinous ligaments. [4] It reduces the range of movement of the lumbosacral joint. [6]
The iliac branch of the iliolumbar artery (ramus iliacus) descends to supply the iliacus muscle; some offsets, running between the muscle and the bone, anastomose with the iliac branches of the obturator artery; one of these enters an oblique canal to supply the bone, while others run along the crest of the ilium, distributing branches to the gluteal and abdominal muscles, and anastomosing in ...
Because of its similarities to deep vein thrombosis (DVT), May–Thurner syndrome is rarely diagnosed amongst the general population. In this condition, the right iliac artery sequesters and compresses the left common iliac vein against the lumbar section of the spine, [5] resulting in swelling of the legs and ankles, pain, tingling, and/or numbness in the legs and feet. [6]
The quadratus lumborum muscle originates by aponeurotic fibers into the iliolumbar ligament and the internal lip of the iliac crest for about 5 centimetres (2.0 in). It inserts from the lower border of the last rib for about half its length and by four small tendons from the apices of the transverse processes of the upper four lumbar vertebrae.
The iliolumbar vein is the vena comitans of the iliolumbar artery. The obturator nerve crosses superficial to it. [1] A single vein is found more commonly than a double vein. [2] It drains vertebral segments four and five. [3] It is closely related to the ascending lumbar vein. [3]