Ligaments and joints of lumbosacral spine and pelvic girdle
Sacroiliac joint opened; interosseous sacroiliac ligament, left lateral view
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Image #215-7
Ligaments and joints of lumbosacral spine and pelvic girdle
Sacroiliac joint opened; interosseous sacroiliac ligament, left lateral view
The left ilium has been detached to display the auricular surface of the sacrum and the interosseous sacroiliac ligaments.
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Interosseous sacroiliac ligaments (pointer indicates only a small part of the area occupied by the numerous bands that comprise these ligaments which have been cut at their attachments to the ilium)
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Iliolumbar artery
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Femoral nerve
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Articular surface sacrum
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Ventral sacroiliac ligament
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Sacral nerve I
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Piriform muscle (cut across)
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Spinous process vertebra L. V
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Supraspinous ligament
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Interspinous ligament L. V - S. I (convex in shape due to compression by extension of vertebra on sacrum)
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Median sacral crest
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Dorsal sacroiliac ligament (cut across)
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Iliac branch of iliolumbar artery
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Area of articular surface in which fibrocartilage has been damaged (remainder of auricular surface intact)
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Joint capsule (lined internally by synovial membrane)