Fig. 2

a-e: Measurement of talar length (TL; distance from posterior extremity to the talar head), radius of the trochlea tali (RT), talar height (TH; perpendicular distance from the tip of the lateral talar process inferiorly to the trochlea tali superiorly) (a), “anterior talar motion segment” (ATM; angular segment available for tibiotalar dorsiflexion in the plantigrade foot position between most anterior part of the trochlea tali and anterior distal tibiaplafond) (b), “talonavicular coverage” (TNC; angle between articular surface of the talus and the navicular bone), “front tarsal index” (FTI; relation of medial cuneiform-navicular distance and cuboid distance) (c), “Meary-Angle” (MA; angle between long axis of the talus and the first metatarsal bone) (d), “Talus-Metatarsal-base-I angle” (TMTB-I; angle between long axis of the talus and a line from the middle of the talar head to the middle of the first metatarsal base) (e)