Two different patients. Two different stories. But a shared delusion. Each is convinced that someone they love dearly is not that person, but an impostor. A curious disorder known as Capgras delusion involves the distinct feeling that the people around you have been replaced.
NPR did story on this delusion disorder. One of the experts they interviews is an interesting neuroscientist who spoke at a TED conference about interesting brain paradoxes, his name is Dr. Ramachandran. Really this story came from Radio Lab, a blog/radio/podcast pair of men who speak on insteresting subjects. All in all, I was impressed with this rare, rare, delusion that can effect people.
As is mentioned in the piece, Capgras delusion, is named after a French psychiatrist. He gave the first case report on a woman who had this issue.
Imagine you look at someone, and you see that they look like someone you know and you know what their name is, and you know a history with this face, but there is no emotional backing to your image. So, you don’t think it’s them because it doesn’t “feel” like them! If they walked out of the room and called you, you’d know them and tell them someone stole their body and impersonated them. Interesting and sad.