Radial Dysplasia (for Parents) - Nemours KidsHealth - Radius thumb
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The radius or radial bone is one of the two large bones of the forearm, the other being the ulna. It extends from the lateral side of the elbow to the thumb side of. The muscles of the thumb are nine skeletal muscles located in the hand and forearm. It inserts to the radial sesamoid bone and the proximal phalanx of the thumb. It is innervated by the median nerve (C8 and T1). The flexor pollicis brevis is a.