University of pennsylvania neurologist douglas smith: A functional disorder is a genuine disorder just as much as a brain injury. The only people who are saying that this is primarily a psychological issue are people who have never examined the patients. We can rely on imaging to an extent, but that requires interpretation and we're left with a pretty giant unknown here.
Several years after US diplomats in Cuba claimed they were attacked by an invisible weapon, similar incidents continue to be reported around the world. Scientists haven’t been able to determine a definitive cause, but the possibilities point toward something just as mysterious as the illness itself: the inner workings of the human brain.
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