Posterior Sacrum Anatomy at Anatomy

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Posterior Sacrum Anatomy. The sacrum does have a dorsal, pelvic, and lateral surface, as well as a base and an apex. A significant number of muscular attachments reside along the posterior aspect of the sacrum.

Sacrum Photograph by Asklepios Medical Atlas
Sacrum Photograph by Asklepios Medical Atlas from fineartamerica.com

Edition of gray's anatomy of the human body. 3) classification of the top sacral. The sacrum is an irregular (sphenoid) bone that makes up the back (posterior) third of the pelvic girdle.

Sacrum Photograph by Asklepios Medical Atlas

Acting as the keystone of the pelvis, the sacrum locks the hip bones together on the posterior side and supports the base of the spinal column as it intersects with the pelvis. Regarded as the keystone of the human body, the sacrum is important because it forms a link between the spine and the iliac bones, and also has an important part to play in hip stability. A ridge across the front (anterior) portion of the s1 vertebra is called the sacral promontory. It serves as the attachment point for the supraspinous ligament.