The causes of amnesia vary from person to person, but the most common are dementia, damage to the hippocampus, head injuries, alcohol abuse, stress and aging.
When it comes to movies, for example, this condition is presented like this: a person suffers a head injury and loses consciousness, forgetting their identity and the people around them as well as all the memories. Of course, this scenario can happen in real life as well, but not like that. To be more specific, head injuries cause memory loss in the hours, days, or weeks before and after you were injured – not to mention that you can’t lose your identity and motor skills.
