Sensation of being strange or unfamiliar with a person or surroundings that actually are familiar. It can occur in normal persons but is most often associated with certain types of epilepsy.
One of the manifestations of temporal lobe epilepsy, in which there is a sudden feeling of unfamiliarity with everyday surroundings.
The subjective sense of being in a completely strange environment when in familiar surroundings. It may be associated with temporal lobe lesions.