rotation of the subtalar joint is thought to be in the region of the middle facet. It is considered a plane synovial joint, also commonly referred to as a gliding joint. It acts as a hinge connecting the talus and calcaneus. There is extensive variation in the inclination from horizontal. The subtalar joint can also be considered a combination of the anatomic subtalar joint discussed above, and also the talocalcaneal part of the talocalcaneonavicular joint. This is the more common view of the subtalar joint when discussing its movement. When both of these articulations are accounted together, it allows for pronation and supination of the midfoot to occur. Pathology The subtalar joint is particularly susceptible to arthritis, especially when it has previously been affected by sprains or fractures such as those of the calcaneum or talus. Symptoms of subtalar joint arthritis include pain when walking, loss of motion through the joint's range of motion, and difficulty walking on uneven surfaces. Physical therapy, orthotics, and surgery are the main treatment options. In flat feet, the joint is typically more horizontal. References Calais-Germain, Blandine. "Anatomy of Movement", Eastland Press, 1993. Additional images External links Foot Joints