This is called the Capgras delusion, and that is a patient, who's otherwise completely normal, has had a head injury, comes out of coma, otherwise completely normal, he looks at his mother and says, "This looks exactly like my mother, this woman, but she's an impostor. She's some other woman pretending to be my mother."
Se llama el delirio de Capgras y este paciente que ha sufrido daño en su cabeza pero que de otro forma seria completamente normal, sale del coma y parece completamente normal pero mira a su madre y dice: "Esta se ve exactamente igual a mi mamá, esta mujer es una impostora, es otra mujer que pretende ser mi madre."