The deltoid ligaments are the ligaments that support the medial longitudinal arch of the foot (the foots arch). These ligaments are less commonly damaged than the lateral ligaments of the ankle. These ligaments are injured when the foot is forced into dorsiflexion and eversion (foot up and out) and are sometimes injured along with the lateral ankle ligaments. The deltoid ligaments often take approximately twice as long to heal as the lateral ankle ligaments.