Electrical disturbances that spread through an injured brain like tsunamis have a direct link to poor recovery and can last far longer than previously realized, researchers at the University of Cincinnati Neuroscience Institute (UCNI) have found. The disturbances, known as cortical spreading depolarizations, are short-circuits (electrical failures) that occur in a localized, or specific, area of injury and result in dampened brain waves. Because of their localization, the depolarizations are invisible in routine electroencephalography (EEG) exams... 
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