Adductor magnus muscle
The adductor magnus and nearby muscles
Structures surrounding right hip-joint. (Adductor magnus at upper right.)
Latin	musculus adductor magnus
Gray's	subject #128 473
Origin	pubis, tuberosity of the ischium
Insertion	femur
Artery	Obturator artery
Nerve	posterior branch of obturator nerve (adductor) and sciatic nerve (hamstring)[1]
Actions	adduction of hip extension of hip

The adductor magnus is a large triangular muscle, situated on the medial side of the thigh.

The portion which arises from the ischiopubic ramus (a small part of the inferior ramus of the pubis, and the inferior ramus of the ischium) is called the "adductor magnesius portion", and the portion arising from the tuberosity of the ischium is called the "hamstring portion". The hamstring portion is not considered part of the hamstring group of muscles, but it is adjacent to it.

Contents 1 Adductor portion 2 Hamstring portion 3 Innervation 4 Osseoaponeurotic openings 5 Action 6 Ontogeny and phylogeny 7 See also 8 Additional images 9 References 10 External links

[edit] Adductor portion

Those fibers which arise from the ramus of the pubis are short, horizontal in direction, and are inserted into the rough line of the femur leading from the greater trochanter to the linea aspera, medial to the gluteus maximus.

Those fibers from the ramus of the ischium are directed downward and laterally with different degrees of obliquity, to be inserted, by means of a broad aponeurosis, into the linea aspera and the upper part of its medial prolongation below.

[edit] Hamstring portion

The medial portion of the muscle, composed principally of the fibers arising from the tuberosity of the ischium, forms a thick fleshy mass consisting of coarse bundles which descend almost vertically, and end about the lower third of the thigh in a rounded tendon which is inserted into the adductor tubercle on the medial condyle of the femur, and is connected by a fibrous expansion to the line leading upward from the tubercle to the linea aspera.

[edit] Innervation

The adductor and hamstring portions of the muscle are innervated by two different nerves. The adductor portion is innervated by the obturator nerve and the hamstring portion is innervated by the sciatic nerve.

[edit] Osseoaponeurotic openings

At the insertion of the muscle, there is a series of osseoaponeurotic openings, formed by tendinous arches attached to the bone. The upper four openings are small, and give passage to the perforating branches of the profunda femoris artery. The lowest (often referred to as the adductor hiatus) is of large size, and transmits the femoral vessels to the popliteal fossa.

[edit] Action

The function of the adductor magnus is to serve as a powerful adductor of the thigh, along with being able to extend the thigh.

[edit] Ontogeny and phylogeny

In lower animals, the adductor magnus crosses the knee joint and inserts into the tibia. In humans, the distal part of the tendon detaches and becomes the medial collateral ligament of the knee joint. (Eizenberg, 2008)

[edit] See also

• adductor hiatus

[edit] Additional images

Muscles of the iliac and anterior femoral regions.

Cross-section through the middle of the thigh.

Deep muscles of the medial femoral region.

The arteries of the gluteal and posterior femoral regions.

[edit] References

[edit] External links

• LUC admg
• -939130803 at GPnotebook
• SUNY Labs 14:st-0401
• Adductor+magnus+muscle at eMedicine Dictionary
• PTCentral

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.

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)