What is the anatomy relevant to ankle sprains?

Updated: Jan 14, 2019
  • Author: Craig C Young, MD; Chief Editor: Sherwin SW Ho, MD  more...
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The ankle joint is a hinged synovial joint with primarily up-and-down movement (plantar flexion and dorsiflexion). The other joints around the ankle are responsible for other movements, giving the ankle a total range of motion (ROM) comparable to that of a ball and socket. The combined movement in the dorsiflexion and plantarflexion directions is greater than 100°; bone-on-bone abutment beyond this range protects the anterior and posterior ankle capsular ligaments from injury. The anterior and posterior ankle capsular ligaments are relatively thin compared with the medial and lateral ankle ligaments.

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