Illiacus

The iliacusFlexor Inside the hip bone; joins with psoas to flex the thigh. is a flat, triangular muscle located in the pelvic region of the human body. It forms part of the iliopsoas group, along with the psoas majorFlexor Runs from lower spine to femur; lifts your thigh or bends your trunk. muscle. 

Illacus Origin

The iliacus muscle originates from the iliac fossaLarge, smooth concave surface on the internal (medial) side of the ilium.. This is a concave, smooth surface on the inner aspect of the pelvic bone. This bone is called the iliumBroad, flaring upper portion of the hip bone; forms the “wings” of the pelvis.. Specifically, the iliacus arises from the upper two-thirds of the iliac fossa, which is part of the pelvis.

Illacus Insertion

The muscle fibers of the iliacus converge and extend downward. They insert medially onto the femurThigh bone; longest and strongest bone in the body; has a large round head and prominent trochanters, specifically the lesser trochanterSmaller medial projection below the head; muscle attachment site.. The lesser trochanter is a bony prominence on the proximalCloser to the point of attachment or origin. part of the femur. It is located on the medialToward the midline of the body side, just below the greater trochanterLarge lateral projection near the head; palpable on the side of the hip..

Illacus Actions

Hip Flexion

Stabilization of the Hip Joint

Assistance in Lumbar Spine Flexion

Interactive Materials