I know that some people that have had really traumatic childhoods develop multiple personalities as a way of blocking these memories and creating new fabricated ones under a different identity.
They may use blood tests to check for nutritional deficiencies, infections, or other issues.
When your hippocampus is impaired, you will have difficulty forming new memories.
Because of the drama of television and the movies, many people who think about hypnotic regression have in mind this most dramatic form of revivification.
Sometimes amnesia is chemically induced for research purposes; in these cases it is temporary.
Head injuries Traumatic head injuries, as well as stroke, tumors, and infections, can also cause damage to your brain.