doppelganger

A delusion that a double of a person or place exists elsewhere; it is related to other defects in recognition and suggests organic disease in the non-dominant parietal lobe

doppelgänger

Psychiatry A delusion that a double of a person or place exists elsewhere; it is related to other defects in recognition and suggests organic disease in the nondominant parietal lobe. See Depersonalization disorder, Schizophrenia.