I have presented a possible case of mania induced by influenza B. Some epidemic influenza viruses may be neurovirulent. These epidemics seem to be associated with postencephalitic Parkinson’s disease, mania, and depression. Viral, neuroanatomic, neurophysiologic, neurochemical, pharmacologic, clinical, and epidemiologic evidence can be found to suggest a connection between the locus ceruleus, the influenza virus, and the induction of a manic psychosis.
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