A cadaver study done to evaluate function of the deltoid ligament and its major subdivisions, the superficial and deep components, revealed that the deltoid ligament is the primary restraint against valgus tilting of the talus, with superficial and deep components being equally effective in this regard. The deep deltoid ligament appeared to be the secondary restraint against both lateral and anterior talar excursion, with the lateral malleolus and supporting ligaments being the primary restraint.
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