deja vu means
deja vu=== feeling of familiarity to a novel stimulus jamais vu==feeling of unfamiliarity to a familiar stimulus ref. Kaplon and sadock, synopsis of psychiatry, 11th edition, pg no.194
General anatomy
Illusion that what one is hearing, one has heard previously
A unfamiliar thought regarded as repetition of a previous thought
Unfamiliar situations or events feel strangely familiar
Feeling of strangeness to familiar situation
Unfamiliar situations or events feel strangely familiar