Iliacus muscle
| Iliacus muscle | ||
|---|---|---|
| The iliacus and nearby muscles | ||
 | ||
| Right hip bone. Internal surface. (Iliac fossa visible at upper left.) | ||
| Latin | musculus iliacus | |
| Gray's | subject #127 467 | |
| Origin: | iliac fossa | |
| Insertion: | lesser trochanter of femur | |
| Artery: | medial femoral circumflex artery, iliac branch of iliolumbar artery | |
| Nerve: | femoral nerve | |
| Action: | flexes and rotates laterally thigh | |
| Antagonist: | Gluteus maximus | |
| Dorlands/Elsevier | m_22/12549271 | |
The Iliacus is a flat, triangular muscle, which fills the iliac fossa.
It arises from the upper two-thirds of this fossa, and from the inner lip of the iliac crest; behind, from the anterior sacroiliac and the iliolumbar ligaments, and base of the sacrum; in front, it reaches as far as the anterior superior iliac spine and anterior inferior iliac spine, and the notch between them.
The 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. Some of the iliacus fibers may reach the body of the femur, for about 2.5 cm. below and in front of the lesser trochanter.
The Iliacus is sometimes considered a part of the Iliopsoas group of hip flexor muscles.
This muscle is innervated by the anterior branches of the Femoral nerve (anterior branches of L2-3).
Additional images
Sacrum, pelvic surface.
Right femur. Posterior surface.
Structures surrounding right hip-joint.
Muscles of the iliac and anterior femoral regions.
The abdominal aorta and its branches.
Structures passing behind the inguinal ligament.
The relations of the femoral and abdominal inguinal rings, seen from within the abdomen. Right side.
The lumbar plexus and its branches
Nerves of the right lower extremity. Front view.
Sacral plexus of the right side.
Posterior view of the anterior abdominal wall in its lower half. The peritoneum is in place, and the various cords are shining through.
External links
- LUC ilia
- -181075889 at GPnotebook
- PTCentral
- SUNY Figs 40:07-05 - "Muscles and nerves of the posterior abdominal wall."
- Norman/Georgetown pelvis (femalepelvicdiaphragm, malepelvicdiaphragm)
This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.
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