Updated: 2/12/2018

Adductor magnus

Review Topic
https://upload.medbullets.com/topic/121935/images/adductor magnus.jpg

Origin Inferior pubic ramus, ischial ramus, and inferolateral area of ischial tuberosity
Insertion Gluteal tuberosity of femur, medial lip of linea aspera, medial supracondylar ridge, and adductor tubercle
Action Powerful thigh adductor; superior horizontal fibers also help flex the thigh, while vertical fibers help extend the thigh
Innervation Posterior division of obturator nerve innervates most of the adductor magnus; vertical or hamstring portion innervated by tibial nerve (L2, L3, L4)
Arterial Supply Medial circumflex femoral artery, inferior gluteal artery, 1st - 4th perforating arteries, obturator artery, and some superior muscular branches of popliteal artery

  • Adductor magnus is innervated by the 
    • obturator nerve (L2-L4) - adductor part 
    • tibial nerve (L4-S3) - hamstring part
  • Primary nerves of the anterior thigh
    • obturator nerve 
      • origin
        • L2-4 of lumbar plexus
      • motor
        • medial compartment of thigh
          • adductor longus 
          • adductor brevis 
          • adductor magnus
          • gracilis 
      • sensory
        • cutaneous branch innervates skin of medial thigh
      • course
        • descends through psoas and emerges at medial border
        • runs posterior to common iliac arteris to the obturator foamen
        • enters thigh through obturator canal
          • splits into anterior and posterior divisions
        • anterior division - descends between adductor longus and brevis
          • pierces fascia lata to become the cutaneous branch of obturator nerve
        • posterior division - descends through obturator externus muscle
          • passes anterior to adductor magnus and gives off branches to supply it
    • tibial nerve 
Blood Supply
  • Adductor magnus is supplied by the 
    • obturator artery
    • femoral artery
    • medial femoral circumflex
    • direct and perforating branches of the deep femoral artery 
  • Obturator artery 
    • arises from internal iliac artery in pelvis
    • bifurcates in medial thigh into two branches
      • anterior branch - pectineus, obturator externus, adductor muscles and gracilis
      • posterior branch - deep gluteal muscles
  • Femoral artery 
    • branches in thigh
      • profunda femoris
        • direct and perforating branches
      • medial femoral circumflex
      • lateral femoral circumflex
Cross Sectional Anatomy
  • Cross section
    • high thigh  
    • mid thigh  
    • low thigh  
  • Adductor magnus lies in the medial compartment of the thigh.
  • medial thigh compartment consists of
    • adductor brevis (obturator n.)
    • adductor longus (obturator n.)
    • adductor magnus (obturator n.)
    • gracilis (obturator n.)
  • adductor magnus is bordered by
    • anterior
      • pectineus
      • adductor longus
      • adductor brevis
      • sartorius (anterior/medial)
    • medial
      • gracilis
      • sartorius (anterior/medial)
    • superior
      • obturator externus
      • quadratus femoris
    • posterior surface
      • semitendinosus
      • semimembranosus
      • biceps femoris
      • gluteus maximus

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