Causes of a brachial plexus injury. Brachial plexus injury (BPI) is an umbrella term for a variety of conditions that may impair function of the brachial plexus nerve network. The majority of pediatric and adult brachial plexus injuries are caused by trauma. The most common inciting events may include:auses of a brachial plexus injury. Brachial plexus injury (BPI) is an umbrella term for a variety of conditions that may impair function of the brachial plexus nerve network. The majority of pediatric and adult brachial plexus injuries are caused by trauma. The most common inciting events may include:
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anger. 1  a strong feeling of displeasure and belligerence aroused by a wrong; wrath; ire. 2  Chiefly British Dialect. pain or smart, as of a sore. 3  Obsolete. 4  to arouse anger or wrath in. 5  Chiefly British Dialect. to cause to smart; inflame. 6  to become angry: He angers with little provocation.