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

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.