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SI Joint Ligaments
Question | Answer |
---|---|
Interosseous SI ligament | located between tuberosities of sacrum and ilium |
Sacrospinous ligmaent attachments | lateral margins of sacrum and coccyx to ischial spine |
Sacrospinous ligament checks: | nutation |
Sacrotuberous ligament attachments | pelvic surface of sacrum to ischial tuberosity |
Sacrotuberous ligament restricts: | restricts sacral nutation |
Posterior SI ligament attachments | PSIS to sacrum |
Posterior SI ligament checks | counternutation |
Iliolumbar ligament attachments | L5 transverse process to iliac crests and interosseous ligament |
Iliolumbar ligament resists: | resists lateral flexion (sidebending) and translation of sacrum |
Anterior SI ligament attachments | Anterior thickening of SI joint capsule |
Anterior SI ligament resists: | resists vertical translation and joint distraction |