Medial Compartment

• Obturator Externus (deep)
  • Bony attachments:
    • 1. Margin of obturator foramen and membrane
    • 2. Trochanteric fossa of femur
  • Innervation: Posterior division of obturator nerve (L3 & L4)
  • Arterial supply: Obturator artery, medial femoral circumflex artery
  • Action: Laterally rotates the thigh and stabilizes femur in acetabulum
• Gracilis
  • Bony attachments:
    • 1. Body and inferior ramus of pubis
    • 2. Superior medial aspect of thetibia (with 2 other muscles to comprise pes anserine - "Goose's foot")
  • Innervation: Posterior division of obturator nerve (L2 & L3)
  • Arterial supply: Branches of the Femoral artery, may receive medial femoral circumflex artery, obturator artery
  • Action: Adduct and flex thigh
• Adductor Brevis
  • Bony attachments:
    • 1. Margin of obturator foramen, body of pubis (just inferior to pectineus)
    • 2. Pectineal line, linea aspera
  • Innervation: Posterior division of obturator nerve (L2, L3, & L4)
  • Arterial supply: Obturator artery, medial femoral circumflex artery
  • Action: Adducts thigh
• Adductor Longus
  • Bony attachments:
    • 1. Pubis, margin of obturator foramen
    • 2. Linea aspera
  • Innervation: Anterior division of obturator nerve (L2, L3, & L4)
  • Arterial supply: Obturator artery, medial femoral circumflex artery
  • Action: Adducts thigh
• Adductor Magnus
  • Bony attachments:
    • 1. Pubis Ischium, margin of obturator foramen
    • 2. Gluteal tuberosity, linea aspera, supracondylar ridge, and adductor tubercle (creates "adductor canal")
  • Innervation: Posterior division of obturator nerve (L3 & L4) and tibial branch of sciatic (L4)
  • Arterial supply: Obturator artery, medial femoral circumflex artery
  • Action: Adducts the thigh, part works in flexion, part works in extension