As the most posterior projection of the iliac crest, it serves for the attachment of the long posterior sacroiliac ligament
, which blends with the sacrotuberous ligament, as well as the multifidus and gluteus maximus muscles.
Ligaments (anterior, posterior, interosseal sacroiliac ligament
, sacrospinous ligament, and sacrotuberous ligament) were left intact.
Lateral branches of dorsal sacral nerve plexus and the long posterior sacroiliac ligament
However, the posterior synovial capsule is noted to be rudimentary at best and the anterior capsule is nothing more than a thickening of the anterior sacroiliac ligament
The close associations with both the dorsal sacroiliac ligament
and the sacrospinous ligament may affect the amount and direction of force transmission within the sacrotuberous ligament.
Additionally, the MRI revealed a disruption of the anterior sacroiliac ligaments on the left side and no affection of the posterior sacroiliac ligaments, the sacrotuberal and sacrospinal ligaments (Figures 1(c) and 1(d)).
The injury pattern of our patient is characterized by an atraumatic symphyseal diastasis with a widened left sacroiliac joint, a rupture of the left anterior sacroiliac ligaments, and a transiliac instability manifested as ventral ilium fracture.
His hurdling career thrived and flourished until the day he came cruising to the leaders in the Champion Hurdle and deflated like last week's party balloon, having strained his sacroiliac ligaments
The long and short posterior sacroiliac ligaments, the interosseous ligaments within the sacroiliac joints and the sacrotuberous ligaments all resist forces leading to vertical translation between the ilia and the sacrum.
The sacrotuberous, sacrospinous and posterior sacroiliac ligaments remain intact.
Additional posterior support is provided by the anterior and posterior sacroiliac ligaments, along with the iliolumbar ligaments, which connect the transverse processes of the L5 vertebral body to the iliac crest.
Further pelvic opening appeared to be resisted by the anterior sacroiliac ligaments, along with the sacrospinous ligaments.