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Academic question about Fibs in direct muscle injury

Gautam Malhotra1/24/19 11:40 AM (CST)
Based on my review of multiple text books, Fibs/PSWs are thought to occur in inflammatory myopathies due to fiber splitting, resulting in essentially denervation of that segment that no longer has access to the neuromuscular junction.

I have often quoted this as the reason for finding abnormal spontaneous activity in muscles that have been injured by direct muscle trauma (either a single severe event or mild repetitive). 
 
A former trainee of mine asked me for a reference for this and i can't find anything about direct muscle trauma. I think i'm right but would prefer if i could quote it.
 
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