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Supination. A movement that can occur (in different ways) at the lower-arm and wrist and also the foot/ankle. Supination can be described for each case: 1  Movement of a forearm to turn the palm of the attached hand forwards or upwards (depending on the position of the rest of the arm at the time).
Two special motions produced by the muscles of the forearm are the supination (anterior rotation) and pronation (posterior rotation) of the forearm and hand. Supination is produced by the biceps brachii of the upper arm and the supinator muscle of the forearm.uscles of the Arm and Hand. The muscles of the arm and hand are specifically designed to meet the bodyâs diverse needs of strength, speed, and precision while completing many complex daily tasks.