Posterior sacroiliac ligament

Definition

The posterior sacroiliac ligament is a strong fibrous band that connects the sacrum to the ilium bones at the back of the pelvis, providing stability and limiting movement between these bones. It plays a crucial role in maintaining the integrity of the pelvic girdle and supporting upper body weight.

Related terms

Sacrum:

The triangular bone at the base of the spine, located between the two hip bones of the pelvis.

Ilium:

The largest bone of the pelvis, forming its uppermost part and connecting with the sacrum at one of its sides.

Pelvic Girdle: A ring-like bony structure, located in the lower part of the trunk, composed of two hip bones (coxal bones), sacrum, and coccyx, providing support for body weight and attachment points for legs