Electroencephalographic Characteristics of the Déjà Vu Phenomenon

The phenomenon of deja vu (DV, “already seen”) is anaberration of mental activity associated with the perceptionof surrounding reality with the impression that objects, con-texts, and people seen for the first time are perceived forsome period as already familiar. This phenomenon is amember of the group of derealization disorders, which alsoincludes symptoms such as the “already experienced,”“already heard,” and “jamais vu” (“never seen”) phenomena.The term was first used by the French psychologist E. Boiracin his book