ANKLE AND FOOT OINA

• Muscles of the Anterior Fascial Compartment of the Leg


  • Tibialis anterior
  • Extensor digitorum longus
  • Peroneus tertius
  • Extensor hallucis longus
  • Extensor digitorum brevis

  
• Tibialis anterior


  Extends foot at ankle joint; inverts foot at subtalar and transverse tarsal joint; holds up medial longitudinal arch of foot

  
• Extensor digitorum longus


  Extends toes; extends foot at ankle joint

  
• Peroneus tertius


  Extends foot at ankle joint; everts foot at subtalar and transverse tarsal joints

  
• Extensor hallucis longus


  Extends big toe; extends foot at ankle joint; inverts foot at subtalar and transverse tarsal joints

  
• Extensor digitorum brevis


  Extends toes
• Muscles of the Lateral Fascial Compartment of the Leg


  • Peroneus longus
  • Peroneus brevis

  
• Peroneus longus


  Plantar flexes foot at ankle joint; everts foot at subtalar and transverse tarsal joints; supports lateral longitudinal and transverse arches of foot

  
• Peroneus brevis


  Plantar flexes foot at ankle joint; everts foot at subtalar and transverse tarsal joint; supports lateral longitudinal arch of foot

  
• Muscles of the Posterior Fascial Compartment of the Leg


  • Gastrocnemius
  • Soleus
  • Plantaris
  • Popliteus
  • Flexor digitorum longus
  • Flexor hallucis longus
  • Tibialis posterior

  
• Gastrocnemius


  Plantar flexes foot at ankle joint; flexes knee joint

  
• Soleus


  Together with gastrocnemius and plantaris is powerful plantar flexor of ankle joint; provides main propulsive force in walking and running
• Plantaris


  Plantar flexes foot at ankle joint; flexes knee joint

  
• Popliteus


  Flexes leg at knee joint; unlocks knee joint by lateral rotation of femur on tibia and slackens ligaments of joint
• Flexor digitorum longus


  Flexes distal phalanges of lateral four toes; plantar flexes foot at ankle joint; supports medial and lateral longitudinal arches of foot

  
• Flexor hallucis longus


  Flexes distal phalanx of big toe; plantar flexes foot at ankle joint; supports medial longitudinal arch of foot

  
• Tibialis posterior


  Plantar flexes foot at ankle joint; inverts foot at subtalar and transverse tarsal joints; supports medial longitudinal arch of foot

  
• Muscle of the Dorsum of the Foot

  • Extensor digitorum brevis

  
• Muscles of the Sole of the Foot


  • Abductor hallucis
  • Abductor digiti minimi
  • Flexor digitorum brevis
  • Quadratus plantae
  • Lumbricals
  • Flexor hallucis brevis
  • Adductor hallucis
  • Flexor digiti minimi brevis
  • Interossei
• Abductor hallucis


  Flexes and abducts big toe; braces medial longitudinal arch
• Abductor digiti minimi


  Flexes and abducts fifth toe; braces lateral longitudinal arch

  
• Flexor digitorum brevis


  Flexes lateral four toes; braces medial and lateral longitudinal arches
• Quadratus plantae


  Assists flexor digitorum longus in flexing lateral four toes
• Lumbricals


  Extends toes at interphalangeal joints
• Flexor hallucis brevis


  Flexes metatarsophalangeal joint of big toe; supports medial longitudinal arch

  
• Adductor hallucis


  Flexes metatarsophalangeal joint of big toe; holds together metatarsal bones
• Flexor digiti minimi brevis

  Flexes metatarsophalangeal joint of little toe

  
• Interossei


  Abduction of toes; flexes metatarsophalangeal joints and extends interphalangeal joints