The Capgras Delusion

The Capgras Delusion is a rare disorder in which a person holds the delusional belief that an acquaintance—usually a spouse or other close family member—has been replaced by an identical impostor. Found in patients diagnosed with schizophrenia, dementia, or those suffering from a brain injury, the disorder is named after Joseph Capgras, the French psychiatrist who first described it in 1923.

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