Lateral: of or referring to the side.
Medial Malleolus : the inside ankle bone.
Sustentaculum Tali : upper and forepart of the medial surface of the calcaneus, is a horizontal bulge.
Calcaneus: heel bone.
Calcaneonavicular Ligament: a ligament on the underside of the foot that connects the calcaneous with the navicular bone.
Navicular Tuberosity: a prominence on the navicular.