Memory loss: what makes people forget who they are?

When amnesia strikes, people can forget everything about their life, including their name. But what causes memory loss? And what happens to people who lose themselves for an hour, a few months – or even for ever?She was missing but police knew where she was. She could not remember her name, her family or her childhood. She knew that she was dying, but only that. Interpol released a missing persons report: 1.7m, 91kg, brown eyes, chip on front tooth, right-handed, Caucasian, appears to be in he