Adductor magnus muscle


Image by/from Beth ohara

The adductor magnus is a big triangular muscle, located on the medial side of the thigh.

It includes 2 parts. The part which develops from the ischiopubic ramus (a little part of the inferior ramus of the pubis, and the inferior ramus of the ischium) is called the pubofemoral section, adductor section, or adductor minimus, and the part developing from the tuberosity of the ischium is called the ischiocondylar section, extensor section, or “hamstring section”. Due to its typical embryonic origin, innervation, and action the ischiocondylar part (or hamstring part) is frequently thought about as part of the hamstring group of muscles. The ischiocondylar part of the adductor magnus is thought about as a muscle of the posterior compartment of the thigh while the pubofemoral part of the adductor magnus is thought about as a muscle of the medial compartment.

Those fibers which develop 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 down and laterally with various degrees of obliquity, to be inserted, by means of a broad aponeurosis, into the linea aspera and the upper part of its medial prolongation listed below.

The medial part of the muscle, made up mainly of the fibers occurring from the tuberosity of the ischium, forms a thick fleshy mass including coarse packages which come down practically 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 thigh, and is linked by a fibrous growth to the line leading up from the tubercle to the linea aspera.

By its anterior surface area the adductor magnus remains in relation with the pectineus, adductor brevis, adductor longus, femoral artery and vein, profunda artery and vein, with their branches, and with the posterior branches of the obturator artery, obturator vein and obturator nerve.

By its posterior surface area with the semitendinosus, semimembranosus, biceps, and gluteus maximus muscle.

By its inner border with the gracilis and sartorius.

By its upper border with the obturator externus, and quadratus femoris.

It is a composite muscle as the adductor and hamstring parts of the muscle are innervated by 2 various nerves. The adductor part is innervated by the posterior department of the obturator nerve while the hamstring part is innervated by the sciatic nerve.

At the insertion of the muscle, there is a series of osseoaponeurotic openings, formed by tendinous arches connected to the bone. The upper 4 openings are little, and offer passage to the boring branches of the profunda femoris artery. The most affordable (typically described as the adductor hiatus) is big, and sends the femoral vessels to the popliteal fossa.

The upper, lateral part of the adductor magnus is an incompletely separated division frequently regarded as a different muscle — the adductor minimus. These 2 muscles are often separated by a branch of the superior perforating branch of the profunda femoris artery.

The adductor magnus is an effective adductor of the thigh, made specifically active when the legs are moved from a broad spread position to one in which the legs parallel each other. The part connected to the linea aspera functions as a lateral rotator. The part which reaches the medial epicondyle functions as a medial rotator when the leg is rotated outwards and flexed, and likewise acts to extend the hip joint.

In other tetrapods, the adductor magnus crosses the knee joint and inserts into the tibia. In human beings, the distal part of the tendon separates and ends up being the medial collateral ligament of the knee. Because of this, the medial collateral ligament of the knee in people might include a couple of muscle fibres as an atavistic variation.

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.

Adductor magnus muscle

Adductor magnus muscle

Adductor magnus muscle

Adductor magnus muscle

Muscles of thigh. Cross section.

Muscles of Thigh. Anterior views.

Muscles of Thigh. Anterior views.

This article incorporates text in the public domain from page 473 of the 20th edition of Gray’s Anatomy (1918)

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