The Spatial Locations of the Subtalar Joint Axis During Range of Motion of the Subtalar Joint The subtalar joint (STJ) is often described in podiatric and orthopedic textbooks as being a "mitered hinge", allowing the foot to undergo three-dimensional motions relative to the leg during its range of motion. The defined motions of the STJ include "pronation", where the STJ motion involves abduction-eversion-dorsiflexion of the calcaneus relative to the talus. The opposite motion, known as "supinati