Adduction of thumb

Clinical manifestations of radial nerve injury in exercise: When the upper arm radial nerve is injured, each extensor is widely paralyzed, including the triceps brachii, radial brachialis, radial long and short wrist extensors, supinator muscles, total extensor fingers, ulnar wrist The extensor, the index finger and the little extensor of the little finger are paralyzed. Therefore, there is sagging of the wrist, the thumb and fingers sag, the metacarpophalangeal joint cannot be extended, the forearm has a pronation deformity, and the posterior deformity cannot be achieved.