The Orthobullets Podcast Foot & Ankle | Ankle Ligaments
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Sep 9, 2025 Dive into the fascinating world of ankle ligaments as the anatomy and functions are expertly reviewed. Uncover the complexities of ankle injuries caused by eversion and inversion mechanisms, along with the critical importance of accurate diagnosis and treatment. The discussion includes insights on diagnostic imaging and practical exam questions, enhancing both understanding and engagement. Connect with the community for ongoing learning in this vital area of orthopedics!
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Ankle Mortise Mechanics And Loads
- The ankle mortise comprises the tibial plafond, medial and lateral malleoli, and talus and allows primary plantarflexion/dorsiflexion with secondary inversion/eversion and rotation.
- Joint reaction forces reach about five times body weight during level walking, stressing ligamentous stabilizers.
Syndesmosis Function And Imaging
- The distal tibiofibular syndesmosis stabilizes the mortise and widens with dorsiflexion while the fibula rotates in the incisura during gait.
- CT is most accurate for syndesmosis assessment, but weight-bearing mortise radiographs and side-to-side comparison improve diagnostic accuracy.
Testing And Imaging The ATFL
- Test the anterior talofibular ligament with an anterior drawer at 20 degrees plantarflexion and compare to the uninjured side.
- Use stress radiographs or MRI for chronic or unclear injuries; ultrasound can be more accurate than plain radiographs.