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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.
The lateral epicondyle is on the thumb side of the elbow when the palm is facing upward. The tendons that attach to it are those connecting the muscles that extend the wrist and fingers. Symptoms can range from mild and transient to those that prevent even lifting a plate or cup of coffee.