Recently I watched the movie Memento and it brought back memories of HM. HM, a famous neuropsychological patient (full name not revealed to preserve his privacy) suffered from amnesia, whose case heralded a whole new slew of findings on human memory.
In early 1950’s HM was treated for epilepsy by having both his hippocampi (a small part of the brain, named for the fact that it is shaped like a sea-horse) removed. Something strange happened. From that point onwards HM was unable to make new memories. He froze in time. He knew who he was (so it was not a case of forgetting his past). He simply could not form any new memories from that day onwards. A few psychologists discovered his case and so started a momentous period in memory research.
The movie Memento shows a somewhat similar case, that of Shelby who is unable to form new memories. His way of dealing with it (amnesia) is to take pictures and write notes in order to remind himself of events and people.