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Posterior sacro-iliac ligament

Other Terms: Posterior sacroiliac ligament, Dorsal sacro-iliac ligament, Posterior sacro-iliac ligament, Ligamentum sacroiliacum posterius, Ligament sacro-iliaque postérieur

Parts

None

Group

Lower limb joints - Pelvic girdle

Description

This is a series of flat ligamentous bands that cover the posterior aspect of the interosseous ligament. These bands pass from the intermediate and lateral crests of the sacrum's first through fourth segments to the posterior superior iliac spine and the iliac crest's internal lip. The lateralmost ligamentous bands blend with the sacrotuberous ligament.

Function

Stabilize the sacroiliac joint and limit anterior rotation and displacement of the pelvic girdle.

Latin

Ligamentum sacroiliacum posterius

French

Ligament sacro-iliaque postérieur

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