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Biomechanics of the Foot & Ankle

ANKLE JOINT - Biomechanics

  • Hinged synovial jt btn tib, fib & talus
  • Tibiotalar, fibulotalar & dist. Tibiofibular artics
  • Intrinsically stable with additional ligamentous stability
  • most imp are:
    - ant inf talofib lig
    - med (deltoid) lig
    - lat lig

Composite joint of: 

  1. Syndesmosis between the distal tibia and fibula
  2. A diarthrodial mortise between the distal tibia, fibula, and talus. 

The Ankle Mortise is a uniplanar hinge joint .

The axes of movement are along a line just distal to the palpated tips of the medial and lateral malleoli 

Figure 1: axes  

In the horizontal plane, the ankle axis projects from anteromedial to posterolateral

Figure 2: ankle axis horizontal



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Biomechanics of the Foot & Ankle
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