Modern Research on the Subtalar and Midtarsal Joints by E.J. Van Langelaan, MD, PhD Subtalar joint (STJ) and midtarsal joint (MTJ) motions involves complex, three-dimensional motions of the talus, calcaneus, navicular and cuboid. The STJ axis is not a hinge-like joint, fixed in space as currently taught to so many health-professionals. Rather, the STJ axis moves in space to a slightly different spatial location relative to the talus and calcaneus as the foot pronates and supinates. The resulting

Anatomy, Range of Motion and Neutral Position of the Subtalar Joint The talus and calcaneus make up the two bones of the subtalar joint (STJ), otherwise known as the talo-calcaneal joint. The STJ consists of three articular facets, the posterior, middle and anterior facets. The two physiologic motions of the STJ are supination and pronation. During STJ supination, the talus glides posterior-superiorly on the posterior facet of the calcaneus. During STJ pronation, the talus glides anterior-inferi

Subtalar Joint Axis Rotational and Translational Motions During Closed Kinetic Chain Pronation and Supination - Sagittal Plane Motion In this three dimensional animation of the medial view of the weightbearing foot skeleton during closed kinetic chain subtalar joint (STJ) pronation and supination, the STJ axis is noted to undergo plantarflexion during pronation and dorsiflexion during supination. As the talus plantarflexes during STJ pronation, note how the STJ axis plantarflexes along with the