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Adductor Longus: Origin, Insertion, Action, Innervation

Adductor Longus Muscle

Adductor Longus Muscle

Origin: Anterior surface of the pubis, in the angle between the crest and pubic symphysis
Insertion: Lower two-thirds of the medial lip of the linea aspera on the posterior surface
Actions: Adduction of the thigh
Innervation: Anterior division of the obturator nerve (L2. L3)
Blood Supply: Femoral artery

Muscle Pain Information: For information about the pain and symptoms caused by the adductor longus muscle see Adductor Longus Pain and Symptoms

Primary Actions of the Adduction Longus

1. Adduction of the thigh at the hip

Agonists:

  • Adductor magnus (anterior part)
  • Adductor brevis

Antagonists:

  • Gluteus maximus (upper fibers)
  • Gluteus medius
  • Gluteus minimus

Gracilis and pectineus assist with adduction of the thigh at the hip

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Secondary Actions of the Adductor Longus

1. Assists with internal rotation of the thigh at the hip
Agonists:

  • Tensor fasciae latae
  • Gluteus mimimus (anterior fibers)
  • Gluteus medius (anterior fibers)

Antagonists:

  • Obturator internus
  • Obturator externus
  • Gemellus superior
  • Gemellus inferior
  • Quadratus femoris

Adductor brevis and adductor magnus assist with internal rotation of the thigh at the hip.

2. Assists with flexion of the thigh at the hip
Agonists:

  • Psoas major
  • Iliacus

Antagonists:

  • Gluteus maximus
  • Semitendinosus
  • Semimembranosus
  • Biceps femoris (long head)
  • Adductor magnus (posterior part)

Pectineus, rectus femoris, and sartorius also assist with flexion of the thigh at the hip.