Adductor longus muscle

Last revised by Reabal Najjar on 27 Dec 2022

The adductor longus muscle is a large triangular-shaped muscle located in the medial compartment of the thigh and belongs to the hip adductors muscle group. The muscle forms the floor of the femoral triangle.

The adductor longus muscle is found anterior to the adductor magnusadductor brevis, anterior branch of the obturator nerve, and deep femoral vessels. It lies lateral to the gracilis and medial to the pectineus. The spermatic cord and fascia lata are situated anterosuperiorly to the adductor longus, while the femoral artery and vein are found in the anteroinferior aspect of the muscle near its attachment.

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 origin of the vastus medialis, and inferior to the insertion of the adductor brevis.

The adductor longus, alongside the adductor group of muscles, aids in thigh adduction, flexion, and external (lateral) rotation at the hip joint. It also supports in stabilizing the pelvis.

Blood supply to the adductor longus comes from the profunda femoris, a branch of the femoral artery and the obturator artery, a branch of the internal iliac artery.

The adductor longus is supplied by the anterior division of the obturator nerve, which arises from the lumbar plexus (L2 - L4).

The adductor longus muscle forms the medial/inferior border of the femoral triangle. The superior border is formed by the inguinal ligament, while the lateral border is formed by the sartorius. The femoral nerve, artery and vein run through this triangular region (lateral to medial).

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Cases and figures

  • Figure 1: anterior thigh muscles (Gray's illustration)
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  • Figure 2: medial thigh muscles (Gray's illustration)
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  • Figure 4: lumbar plexus (Gray's illustration)
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  • Figure 3: femoral arteries (Gray's illustration)
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  • Figure 5: the femoral triangle (diagram)
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