Quadratus femoris muscle
The quadratus femoris and nearby muscles
Muscles of the gluteal and posterior femoral regions with quadratus femoris muscle highlighted
Latin	musculus quadratus femoris
Gray's	subject #128 477
Origin	Ischial tuberosity
Insertion	Intertrochanteric crest
Artery	Inferior gluteal artery
Nerve	Nerve to quadratus femoris (L4-S1)
Actions	lateral rotation and adduction of thigh[1]

The quadratus femoris is, as its name implies, a flat, quadrilateral skeletal muscle. Located on the posterior side of the hip joint, it is a strong lateral rotator and adductor of the thigh,^[2] but also acts to stabilize the femoral head in the Acetabulum.

Contents 1 Course 2 Additional images 3 Notes 4 References 5 External links

[edit] Course

It originates on the lateral border of the ischial tuberosity of the ischium of the pelvis.^[1] From there, it passes laterally to its insertion on the posterior side of the head of the femur: the quadrate tubercle on the intertrochanteric crest and along the quadrate line, the vertical line which runs downward to bisect the lesser trochanter on the medial side of the femur. Along its course, quadratus is aligned edge to edge with the inferior gemellus above and the adductor magnus below, so that its the upper and lower borders run horizontal and parallel.^[3]

At its origin, the upper margin of the adductor magnus is separated from it by the terminal branches of the medial femoral circumflex vessels.

A bursa is often found between the front of this muscle and the lesser trochanter. Sometimes absent.

[edit] Additional images

Right femur. Posterior surface.

Structures surrounding right hip-joint.

Nerves of the right lower extremity Posterior view.

[edit] Notes

[edit] References

• Mcminn, R.M.H. (2003). Last's Anatomy Regional and Applied. Elsevier Australia. ISBN 0729537528. http://books.google.se/books?id=0qaiox_Vqd4C&pg=PA166. 
• Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol 1: Locomotor system (5th ed.). Thieme. ISBN 3-13-533305-1.  (ISBN for the Americas 1-58890-159-9.)
• Thieme Atlas of Anatomy. Thieme. 2006. ISBN 3-13-1420511-2.  (ISBN for the Americas 1-58890-419-9)

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained within it may be outdated.

[edit] External links

• LUC qf
• 147849294 at GPnotebook
• PTCentral
• SUNY Labs 13:st-0409

v • d • e List of muscles of lower limbs (TA A04.7, GA 4.465) ILIAC Region / ILIOPSOAS psoas major/psoas minor · iliacus BUTTOCKS gluteals: (maximus, medius, minimus) · tensor fasciae latae lateral rotator group: quadratus femoris · inferior gemellus · obturator internus · superior gemellus · piriformis THIGH / compartments Anterior sartorius · quadriceps (rectus femoris, vastus lateralis, vastus intermedius, vastus medialis) · articularis genu Posterior/hamstring biceps femoris · semitendinosus · semimembranosus Medial pectineus · obturator externus · gracilis · adductor (longus, brevis, magnus) Fascia Femoral sheath (Femoral canal) · Femoral ring Adductor canal · Adductor hiatus fascia lata (Iliotibial tract, Lateral intermuscular septum of thigh, Medial intermuscular septum of thigh, Fascia cribrosa/Saphenous opening) LEG/ Crus/ compartments Anterior tibialis anterior · extensor hallucis longus · extensor digitorum longus · peroneus tertius Posterior superficial · triceps surae (gastrocnemius, soleus, Achilles tendon) · plantaris deep · tarsal tunnel (flexor hallucis longus, flexor digitorum longus, tibialis posterior) · popliteus Lateral peroneus muscles (longus, brevis) Fascia Pes anserinus crural fascia (Anterior crural intermuscular septum, Posterior crural intermuscular septum, Transverse intermuscular septum) FOOT Dorsal extensor hallucis brevis · extensor digitorum brevis Plantar 1st layer (abductor hallucis, flexor digitorum brevis, abductor digiti minimi) · 2nd layer (quadratus plantae, lumbrical muscle) · 3rd layer (flexor hallucis brevis, adductor hallucis, flexor digiti minimi brevis) · 4th layer (dorsal interossei, plantar interossei) Fascia Plantar fascia retinacula (Peroneal, Inferior extensor, Superior extensor, Flexor)

This muscle article is a stub. You can help Wikipedia by expanding it. v • d • e