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The ligament extends inferolaterally from its medial attachment, [1] radiating laterally. [2] It represents the thickened inferior border of anterior and middle layers of thoracolumbar fascia. Inferiorly, the ligament is partially continuous with the lumbosacral ligament [1] (which may be considered an inferior subdivision of the iliolumbar ...
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 posterior layer is attached to the spinous processes of lumbar and sacral vertebrae, and to the supraspinous ligament. [ 2 ] : 814–815 At sacral levels, the posterior layer attaches to the posterior superior iliac spines, and posterior iliac crest, fuses with the underlying erector spinae muscle aponeurosis, [ 2 ] : 814–815 and extends ...
The lumbosacral ligament extends obliquely inferior-ward from its medial attachment. Superiorly, it is partially continuous with the inferior margin of the iliolumbar ligament [ 2 ] (the lumbosarcal ligament can be considered an inferior subdivision of the iliolumbar ligament).
The major function of the interosseous sacroiliac ligament is to keep the sacrum and ilium together. [2] This prevents abduction or distraction of the sacroiliac joint. [2] It also helps to bear the weight of the thorax, upper limbs, head, and neck. This is performed by the nearly horizontal direction of the fibers running perpendicular from ...
It may originate from the outer end of the inguinal ligament, the notch of the ilium, the ilio-pectineal line or the pubis.. The muscle may be split into two parts, and one part may be inserted into the fascia lata, the femur, the ligament of the patella or the tendon of the semitendinosus.
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Interosseous sacroiliac ligament; Posterior sacroiliac ligament; Sacrotuberous ligament; Sacrospinous ligament; The anterior ligament is not much of a ligament at all and in most cases is just a slight thickening of the anterior joint capsule. The anterior ligament is thin and not as well defined as the posterior sacroiliac ligaments.