Adult brachial plexus injuries: mechanism, patterns of injury, and physical diagnosis

      Brachial plexus lesions frequently lead to significant physical disability, psychologic distress, and socioeconomic hardship. Adult brachial plexus injuries can be caused by various mechanisms, including penetrating injuries, falls, and motor vehicle trauma. Often the diagnosis is delayed or ignored as the practitioner waits for some recovery. Expedient diagnosis and testing is the best means of maximizing functional return. Evaluators must remember that muscles will begin to undergo atrophy and lose motor end plates as soon as the proximal injury occurs. Thus, early surgical intervention is the best predictor of a successful outcome.
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