(Iliopsoas) Iliacus

Hip-muscle-model-4-labeledMuscle Origin

Iliac fossa to lesser trochanter.

The origin of the Iliacus is the superior two-thirds of the internal surface of the iliac fossa, the inner lip of the iliac crest, the ventral surface of the sacroiliac and iliolumbar ligaments, and the upper surface of the lateral part of the sacrum. The iliacus arises from the iliac fossa on the interior side of the hip bone, and also from the region of the anterior inferior iliac spine (AIIS). Wiki


Base of the lesser trochanter of femur.

Its fibers are often inserted in front of those of the psoas major and extends distally over the lesser trochanter. Insertion is at the lesser trochanter of the femur after being joined by the tendon of psoas major. The conjoined tendon passes under the inguinal ligament to enter the thigh.


Flex thigh at hip.

The (Iliopsoas) Iliacus flexes and rotates the thigh laterally .

Innervation – Nerve control

Femoral nerve.

The femoral nerve is a nerve in the thigh that supplies skin on the upper thigh and inner leg, and the muscles that extend the knee. Wiki


Medial femoral circumflex artery, iliac branch of iliolumbar artery.

The medial circumflex femoral artery (internal circumflex artery, medial femoral circumflex artery) is an artery in the upper thigh that helps supply blood to the neck of the femur. Wiki

Antagonist muscles

Gluteus maximus.

The gluteus maximus (also known collectively with the gluteus medius and minimus, as the gluteal muscles, and sometimes referred to informally as the “glutes”) is the main extensor muscle of the hip. It is the largest and most superficial of the three gluteal muscles and makes up a large portion of the shape and appearance of each side of the hips. Wiki

Pictures of muscles


Trigger Point Referrals


Stretching description








Additional Resources

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