Iliacus muscle


Originates at the upper two-third of the iliac fossa.

Insertion at the base of the lesser trochanter of femur.

Arterial supply is medial femoral circumflex artery, and iliac branch of iliolumbar artery.

Innervated by the femoral nerve.

It flexes and rotates laterally thigh.

Antagonist muscle is the Gluteus maximus.

Is a flat triangular muscle which fills the iliac fossa.

Arises from the iliac fossa on the interior side of the hip bone, and also from the region of the anterior inferior iliac spine.

The iliacus muscle joins the psoas major to form the Iliopsoas as which it proceeds across the iliopubic eminence through the muscular lacuna to its insertion on the lesser trochanter of the femur.

The iliacus muscle fibers are often insert in front of those of the psoas major and extends distally over the lesser trochanter.

The iliopsoas is innervated by the femoral nerve and branches from the lumbar plexus.

The iliacus is important for lifting/flexing the femur forward.

The iliopsoas bends the trunk forward and can lift the trunk from a lying posture because the psoas major crosses several vertebral joints and the sacroiliac joint.

Because of its origin in the lesser pelvis the iliacus acts exclusively on the hip joint.

Dysfunction may be associated with pain in the lower abdomen, groin, 
buttocks, down the leg, hip Joint, lower back and sacroiliac joint.

The muscle attaching along the lumbar spine is the psoas.

While they are both primary hip flexors with a common attachment, they are distinct muscles and can cause unique problems.

This muscle can lead to chronic the iliacus can shorten over time due to prolonged sitting and/or driving and the absence of regular stretching.

When the iliacus muscle is in a state of chronic contraction numerous undesirable consequences can result:

A chronically contracted iliacus can become ischemic. can develop trigger points which refer pain, can distort the movement of the hip joint. can cause compensation of other parts of the body.

Triggers point sensations in the iliacus can refer sensation to the groin, the hip, and down the leg.

Patients may experience pain in any of a variety of places in the body including: lower abdomen, groin, buttocks, leg, hip,, lower back, sacroiliac joint, and iliac crest,

Stretching is part of a preventive strategy.


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