英文互译镜像站

Adductor magnus muscle

Last updated
Adductor magnus muscle
Anterior Hip Muscles 2.PNG
The adductor magnus and nearby muscles
Gray344.png
Structures surrounding right hip-joint (adductor magnus at upper right)
Details
Origin Pubis, tuberosity of the ischium
Insertion Linea aspera and adductor tubercle of femur
Artery Deep femoral artery
Nerve Posterior branch of obturator nerve (adductor) and sciatic nerve (hamstring)
Actions Adduction of hip (both portions)
flexion of hip (adductor portion)
extension of hip (hamstring portion)
Identifiers
Latin musculus adductor magnus
TA98 A04.7.02.028
TA2 2630
FMA 22443
Anatomical terms of muscle

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

Contents

It consists of two parts. 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 pubofemoral portion, adductor portion, or adductor minimus, and the portion arising from the tuberosity of the ischium is called the ischiocondylar portion, extensor portion, or "hamstring portion". Due to its common embryonic origin, innervation, and action, the ischiocondylar portion (or hamstring portion) is often considered part of the hamstring group of muscles. The ischiocondylar portion of the adductor magnus is considered a muscle of the posterior compartment of the thigh while the pubofemoral portion of the adductor magnus is considered a muscle of the medial compartment.

Structure

Pubofemoral (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.

Ischiocondylar (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.

Relations

It is bounded by the following: [1]

Nerve supply

It is a composite muscle as the adductor and hamstring portions of the muscle are innervated by two different nerves. The adductor portion is innervated by the posterior division of the obturator nerve while the hamstring portion is innervated by the sciatic nerve. [2] [3]

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 large, and transmits the femoral vessels to the popliteal fossa.

Variation

The upper, lateral part of the adductor magnus is an incompletely separated division often considered a separate muscle — the adductor minimus. [4] These two muscles are frequently separated by a branch of the superior perforating branch of the profunda femoris artery. [5]

Function

The adductor magnus is a powerful adductor of the thigh, made especially active when the legs are moved from a wide spread position to one in which the legs parallel each other. The part attached to the linea aspera acts as a lateral rotator. The part which reaches the medial epicondyle acts as a medial rotator when the leg is rotated outwards and flexed, and also acts to extend the hip joint. [4]

Other animals

In other tetrapods, 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. Because of this, the medial collateral ligament of the knee in humans may contain a few muscle fibres as an atavistic variation. [6]

Additional images

See also

References

PD-icon.svgThis article incorporates text in the public domain from page 473 of the 20th edition of Gray's Anatomy (1918)

  1. ↑ Wilson, Erasmus (1851) The anatomist's vade mecum: a system of human anatomy, p 261
  2. ↑ MedicalMnemonics.com: 255
  3. ↑ "Adductor Magnus". Department of Radiology, University of Washington. Archived from the original on 28 August 2010. Retrieved 2010-08-16.
  4. 1 2 Platzer, Werner (2004), " Color Atlas of Human Anatomy, Vol. 1, Locomotor System , Thieme, 5th ed, p 242
  5. ↑ Bergman, Ronald A.; Afifi, Adel K.; Miyauchi, Ryosuke (2010), Adductor Minimus (Henle, Günther), Anatomy Atlases
  6. ↑ Norman Eizenberg et al., General Anatomy: Principles and Applications (2008), p 53.
This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.
站点核心词加权 蚪侠镜像站群 网页镜像工具 开源整站镜像工具 泛目录+镜像