How do people develop multiple personalities, and (how) can professionals tell which personality a patient is showing with a brain scan?
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Dissociative Identity Disorder, aka D.I.D usually develops as a result of extreme long term abuse in childhood. Both sexual and physical. From my understanding, the personalities develop as a way to either comfort themselves or to protect themselves or both.
As far as brain scans goes, they can distinguish between a healthy brain and one with D.I.D. Im not 100% sure on this but if they can tell which personality is showing at that time it’s most likely because the personality is more aggressive or maybe really happy. And they see the part of the brain that controls those emotions lighting up.
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