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/suÂ·piÂ·naÂ·tion/ (sooâ³pÄ­-naÂ´shun) [L. supinatio ] the act of assuming the supine position, or the state of being supine. Applied to the hand, the act of turning the palm forward (anteriorly) or upward, performed by lateral rotation of the forearm. Applied to the foot, it generally implies movements resulting in raising of the medial margin of the foot, hence of the longitudinal arch.
Inversion is where the sole of the foot is turned inwards, plantar flexion is where the foot and toes point downwards and adduction of the ankle involves the toes pointing across the body. Combine all three movements and you have supination.When standing, supination occurs as the foot rolls outwards, placing most of the weight onto the outside of the foot and raising the arch. Supination is a normal part of the gait cycle (walking/running) which allows the foot to form a rigid structure for propulsion.The opposite movement to supination is pronation, this is also a normal part of the gait cycle and when excessive is termed overpronation.nversion is where the sole of the foot is turned inwards, plantar flexion is where the foot and toes point downwards and adduction of the ankle involves the toes pointing across the body. Combine all three movements and you have supination.