"Already Seen"

Margrethe Johnsen 2nd period

Deja Vu

WHY

Deja Vu is a very common sensation with people and I experience it very frequently throughout the week. It's a very strange occurrence and every time it happens it puts me at an odd uneasiness for a couple seconds. I would like to figure out why deja vu occurs as well as what it really is so I can help myself to remember this the next time it happens to me or someone I know.
Big image
Deja Vu is the strong feeling that the situation you are currently in has happened before or has fully been experienced before. It creates the subject to have very unsettling feelings and confused thoughts.

The Brain

Big image
According to psychologists, Deja Vu occurs because a person has a brief glimpse of an object or situation, before the brain completed "constructing" a full conscious perception of the experience. The "partial perception" creates the false sense of familiarity. The hippocampus and prefrontal cortex are in action while using conscious recollection. The familiarity side of deja vu accesses the medial temporal cortex. When the two processes get out of sync and can't catch up with each other, Deja Vu seems to occur. One theory people seem to believe is the events being stored into memory before the conscious part of the brain can process and receive it.

The Research & Psychologist's

They seem to believe there are ways disorders and medication can be related to Deja Vu occurring. After further research they have found out disorders do not have much to do with it occurring but more so a neurological anomaly related to improper discharge of the brain. Drugs however, when certain ones are mixed together, do cause deja vu. Psychologists Banister and Zangwill (1941) used hypnosis to give their subjects posthypnotic amnesia for things they had already seen. It caused them to have deja vu when asked again because of the hypnosis. Many researchers just believe every recall of an event is simply just a recall of the last reconstruction. It has also been said to be related to temporal-lobe epilepsy.
Big image
Deja Vu is used in many forms of entertainment today, being the topic of film, television, books, etc. Almost 70% of the population reports they have experienced Deja Vu multiple times throughout their lifetime. It is very common and no one seems to have found the definite answer why it occurs.