Clinical imaging · UKMLA & AKT

Ankle ligament sprains

A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.

Key high-yield points

  • ATFL (anterior talofibular ligament) - weakest lateral ligament; resists inversion in plantarflexion; injured in ~90% of ankle sprains
  • CFL (calcaneofibular ligament) - resists inversion in neutral/dorsiflexion
  • PTFL (posterior talofibular ligament) - strongest; only injured in severe/high-impact trauma
  • Deltoid ligament (medial) - resists eversion; rarely injured due to inherent strength and longer lateral malleolus acting as mechanical block
  • Syndesmotic ligaments - maintain ankle mortise width; injured by dorsiflexion + external rotation ('high ankle sprain')

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