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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adj. anÂ·griÂ·er, anÂ·griÂ·est. 1. Feeling or showing anger; incensed or enraged: angry at my boss; angry with her. 2.Indicative of or resulting from anger: an angry silence. 3.e laughed angrily at his own foolishness: it was absurd to care what an anaemic little waitress said to him; but he was strangely humiliated.