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The iliacus muscle is the triangle-shaped muscle in your pelvic bone that flexes and rotates your thigh bone. The iliacus is one of the most important hip flexor muscles in your body. It works with the other muscles in the hip and thigh to help you bend, run, walk, sit, and maintain correct posture.
The iliacus is a flat, triangular muscle which fills the iliac fossa. It forms the lateral portion of iliopsoas, providing flexion of the thigh and lower limb at the acetabulofemoral joint.
The iliacus muscle has a vast origin, the majority of it arising from the superior two-thirds of the iliac fossa. The rest arises from several other origin points, which are the inner lip of the iliac crest, the lateral aspect of the sacrum and anterior sacroiliac and iliolumbar ligaments.
The iliacus muscle is shaped like a triangle, flat and an exact fit of the iliac fossa — the curved surface of the largest pelvic bone. Together with the psoas major muscle, it is also called the iliopsoas muscle. A portion of this muscle is attached to the iliac fossa, two-thirds from its top.
The iliacus muscle is well known for its relationship to the psoas major muscle. Where does it attach? What postures lengthen it?
The iliacus is part of the hip rotator muscles, which are responsible for the flexing of the thigh on the pelvis and the forward tilting of the pelvis. It is also one of the key muscles...
The iliacus is a muscle of the posterior abdominal wall. It is a fan-shaped muscle that is situated inferiorly on the posterior abdominal wall. It combines with the psoas major muscle to form the iliopsoas – the major flexor of the thigh at the hip joint.