Gait Examination of Pes Cavus Deformity with Laterally Deviated Subtalar Joint Axes The walking gait of individuals that have a pes cavus deformity with a laterally deviated subtalar joint axis can be quite abnormal. Many of these individuals demonstrate rapid subtalar joint supination at heel contact during walking which increases the shock of heel contact and causes abnormal rearfoot supination at a time when the subtalar joint of the foot should be pronating. This 31 year-old male, was referr