Final answer:
The talocrural joint is supported by the deltoid ligament medially and three ligaments laterally—the anterior talofibular, posterior talofibular, and calcaneofibular ligaments—which stabilize the ankle and resist inversion.
Step-by-step explanation:
The talocrural joint, also known as the ankle joint, is a uniaxial joint that allows for dorsiflexion and plantar flexion of the foot. It is supported by several strong ligaments that serve to stabilize the joint and resist abnormal movements. On the medial side, there is the broad deltoid ligament which resists excessive eversion of the foot. The lateral side of the ankle is supported by three key ligaments: the anterior talofibular ligament, the posterior talofibular ligament, and the calcaneofibular ligament. These ligaments support the ankle and also resist excess inversion of the foot, which is a common injury known as an inversion ankle sprain.