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Over a period of twenty years a small number of patients, thirty-one, have been seen who suffered injuries of the infraclavicular brachial plexus as a direct result of skeletal injury in the region of the shoulder joint. Except for isolated circumflex nerve injuries the prognosis is generally good whatever part of the plexus is damaged. The treatment is conservative and its two most important features are prevention of stiffness of joints and the control, by regular galvanic stimulation, of denervation atrophy of muscle during the often prolonged period before recovery becomes apparent.

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We performed long-term followup (31 to 276 months) of 11 contact athletes who had sustained isolated injuries to their axillary nerves during athletic competition. There were no known shoulder dislocations. Electromyographs were taken of 10 patients, and all patients had confirmation of clinically defined injuries that were confined to their axillary nerves. Nine injuries were sustained while tackling opposing players in football; two were sustained in hockey collisions. In seven athletes, the mechanism of injury was a direct blow to the anterior lateral deltoid muscle. In four athletes, there were simultaneous contralateral neck flexion and ipsilateral shoulder depression. At followup, all patients had residual deficits of axillary sensory and motor nerve function. There had been no deltoid muscle improvement in three patients, moderate improvement in two patients, and major improvement in six patients. However, shoulder function remained excellent, with all athletes maintaining full range of motion and good-to-excellent motor strength. Axillary nerve exploration and neurolysis in four patients did not significantly affect the outcomes. Although no patient had full recovery of axillary nerve function, 10 of 11 athletes returned to their preinjury levels of sports activities, including professional athletics.