The medial ligament of talocrural joint (or deltoid ligament) 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 the Anterior Tibiotalar Ligament, Tibiocalcaneal Ligament, Posterior Tibiotalar Ligament, and Tibionavicular Ligament.
It consists of two sets of fibres, superficial and deep.

Superficial fibres

Of the superficial fibres,

• the most anterior (tibionavicular) pass forward to be inserted into the tuberosity of the navicular bone
  Navicular bone
  The navicular bone is a small bone found in the feet of both humans and horses.- Human anatomy :The navicular bone is one of the tarsal bones, found in the foot. Its name derives from the bone's resemblance to a small boat, caused by the strongly concave proximal articular surface...
  
  , and immediately behind this they blend with the medial margin of the plantar calcaneonavicular ligament
  Plantar calcaneonavicular ligament
  The plantar calcaneonavicular ligament is a ligament on the underside of the foot that connects the calcaneus with the navicular bone.-Structure:...
  
  ;
• the middle (tibiocalcaneal) descend almost perpendicularly to be inserted into the whole length of the sustentaculum tali
  Sustentaculum tali
  At the upper and forepart of the medial surface of the calcaneus is a horizontal eminence, the sustentaculum tali , which gives attachment to the plantar calcaneo-navicular ligament, tibiocalcaneal ligament, and medial talocalcaneal ligament.This eminence is concave above, and articulates with the...
  
   of the calcaneus;
• the posterior fibres (posterior tibiotalar) pass backward and lateralward to be attached to the inner side of the talus
  Talus bone
  -External links:* *...
  
  , and to the prominent tubercle on its posterior surface, medial to the groove for the tendon of the Flexor hallucis longus.

Deep fibres

The deep fibres (anterior tibiotalar) are attached, above, to the tip of the medial malleolus, and, below, to the medial surface of the talus.

Coverings

The deltoid ligament is covered by the tendons of the Tibialis posterior and Flexor digitorum longus.

External links

• http://www.ithaca.edu/faculty/lahr/LE2000/ankle%20pics/5medankle-new.jpg