deltoid ligament deltoid ligament the deltoid ligament (or medial ligament of talocrural joint) is a strong, flat, triangular band, attached, above, to the apex and anterior and posterior borders of the medial malleolus. the deltoid ligament is composed of 4 fibers: 1. anterior tibiotalar ligament 2. tibiocalcaneal ligament 3. posterior tibiotalar ligament 4. tibionavicular ligament. it consists of two sets of fibers, superficial and deep. deltoid ligamentligaments of the medial aspect of the foot.detailsfromtalus bone (tarsal bones)tomedial malleolus of the tibiaidentifierslatinligamentum collaterale mediale articulationis talocruralis, ligamentum deltoideumta98a03.6.10.003ta21913fma44055anatomical terminology superficial fibres of the superficial fibres, tibionavicular pass forward to be inserted into the tuberosity of the navicular bone, and immediately behind this they blend with the medial margin of the plantar calcaneonavicular ligament; tibiocalcaneal descend almost perpendicularly to be inserted into the whole length of the sustentaculum tali of the calcaneus; posterior tibiotalar from the posterior colliculus of the medial malleolus to the posteromedial surface of the talus deep fibres the deep fibres (anterior tibiotalar) are attached from the anterior colliculus of the medial malleolus to the medial talus and medial tubercle coverings the deltoid ligament is covered by the tendons of the tibialis posterior and flexor digitorum longus which are supplied by the tibial nerve (l4, l5, s1, s2, and s3). additional images ankle joint.deep section. ankle joint. deep dissection. ankle joint. deep dissection. ankle joint. deep dissection.