Adductor Longus – Origin, Insertion, Nerve Supply, Function

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Adductor Longus – Origin, Insertion, Nerve Supply, Function

Adductor Longus Muscle is a major adductor of the thigh. The muscle is the most anterior muscle in the group. It fans out from its origin on the anterior aspect of the pubis and inserts on the linea aspera of the femur. It covers both the anterior portion of the adductor brevis and the central portion of the adductor Magnus. The adductor longus (also adductor longus muscle, latin: musculus adductor longus) is one of the adductor muscles located in the medial region of the thigh.

Adductor Longus Muscle

Origin and Insertion

The adductor longus, a muscle of the medial compartment of the thigh, is triangular in shape and forms in the floor of the femoral triangle and adductor canal.

  • The muscle originates from the anterior surface of the body of the pubis, inferior to pubic crest and lateral to the pubic symphysis. It inserts onto the middle third of the medial lip of the linea Aspera. This insertion point is between the insertion of the adductor Magnus and the origin of vastus medialis muscle, and inferior to the adductor brevis insertion.
  • The adductor longus arises from the body of pubis inferior to pubic crest and lateral to the pubic symphysis. [rx]
  • It lies centrally on the adductor Magnus, and near the femur, the adductor brevis is interposed between these two muscles. Distally, the fibers of the adductor longus extend into the adductor canal.[rx]
  • It is inserted into the middle third of the medial lip of the linea aspera.[rx]

Nerve Supply

  • The adductor longus is supplied by the anterior division of the obturator nerve. All three adductors (except the hamstring part of the adductor Magnus) and gracilis are supplied by the obturator nerve (anterior divisions of the ventral rami of L2-L4).
  • As part of the medial compartment of the thigh, the adductor longus is innervated by the anterior division (sometimes the posterior division) of the obturator nerve.[rx] The obturator nerve exits via the anterior rami of the spinal cord from L2, L3, and L4.
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As the nerve passes the hip, it also gives an articular branch to the joint. It supplies adductor longus, adductor brevis, and gracious.

Blood Supply

  • Deep femoral artery (ventral view)
  • The blood supply to adductor longus comes from two arteries, the profundal femoris artery (a branch of the femoral artery) and the obturator artery (a branch of the internal iliac artery).
  • The proximal part of the muscle is supplied by the medial circumflex artery (branch of the profundal femoris artery). Profunda femoris vein receives tributaries that correspond to the branches of the artery.

Function

  • Its main actions are to abduct and laterally rotate the thigh; it can also produce some degree of flexion/anteversion.[rx]
  • The main action of the adductor group of muscles is to adduct the thigh at the hip joint. The adductor longus muscle also participates in external/lateral rotation and flexion of the thigh.
  • The adductors help to stabilize the stance while standing and also have an important role in balancing the body on the lower limb during walking.

References

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