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Pronation. A movement that can be performed by the lower-arm/wrist and also by the ankle/foot. The action of pronation can be described for each: 1  Movement of a forearm to turn the palm of the attached hand backwards or downwards (depending on the position of the rest of the arm at the time). 2  See video of pronation of the forearm.
Muscles. Most of the muscles which act on the wrist joint, are situated within the forearm, with only the tendon crossing the joint and inserting on the hand. The muscles on the back of the forearm (dorsal aspect) act to extend the wrist or pull it back as if pulling a ring-pull: 1  Extensor carpi radialis brevis.2  Extensor carpi radialis longus. 3  Extensor carpi ulnaris.4  Extensor digitorum communis. 5  Extensor pollicis longus.he muscles on the back of the forearm (dorsal aspect) act to extend the wrist or pull it back as if pulling a ring-pull: 1  Extensor carpi radialis brevis. 2  Extensor carpi radialis longus. 3  Extensor carpi ulnaris. 4  Extensor digitorum communis.