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Iliacus
The Iliacus is a flat, triangular muscle that is considered as part of the illiopsoas group of hip flexor muscles.
Anatomy of the Iliacus
The Iliacus is antagonist to the gluteus maximus and innervation is by the femoral nerve. It is supplied by the medial femoral circumflex artery and the iliac branch of iliolumbar artery.
The Iliacus arises from the upper two-thirds of this fossa, and from the inner lip of the iliac crest.
The Iliacus fibers converge to be inserted into the lateral side of the tendon of the Psoas major, which contributes to flexing the femur anteriorly onto the pelvis.
Functions of the Iliacus
The iliacus flexes and rotates the thigh laterally.
Together with the psoas major, it functions primarily to lift the upper leg towards the body when the body is fixed or to pull the body towards the leg when the leg is fixed.
You will use the iliacus muscle when climbing steps in your daily activity.
Some of the best exercises to strengthen the iliacus muscle include the hip flexor stretch, standing hip flexion with a resistance band and seated hip flexion with a resistance band.
The common injuries to the iliacus are Iliopsoas inflammation and Iliopsoas rupture.













