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Ankle Joint

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Normal mortise radiograph of the ankle showing the articular components of the distal fibula, tibia and talus[1]
  • Alternate names
    • Talocrural Joint
  • Osseous Components
    • Articular component of distal Fibula (Lateral Malleolus), Tibia (Medial Malleolus)
    • Trochlear dome of the Talus
  • Synovial joint
  • Ankle Mortise
    • Defined by medial and lateral malleoli and the distal tibial plafond



Illustration of lateral view of ankle joint with ligaments, bones and tendons labeled
  • Hinge joint permitting dorsiflexion and plantarflexion
    • Dorsal flexion (50°)
    • Plantar flexion (20°)
  • Axis of motion is rotated laterally 20–30°, inclined downward 10°[2]
    • Occurs because fibular malleolus extends more distally and posteriorly than the tibial malleoli
  • Surface of talus is wider anteriorly and also cone shaped, apex pointing medially
    • Dorsiflexion: abduction, eversion
    • Plantarflexion: adduction, inversion

Vascular Supply


Clinical Significance

See Also


  1. https://www.startradiology.com/internships/general-surgery/ankle/x-ankle/
  2. Inman, VT . The Joints of the Ankle. Baltimore, MD: Williams & Wilkins; 1976.
Created by:
John Kiel on 31 May 2021 18:59:34
Last edited:
2 July 2021 18:52:29