In the movie 50 First Dates, the main character, Lucy Whitmore, is an amnesiac who forgets everything from the day when she goes to sleep as a result of injury to her brain. The doctor in the film defines this as a lack of ability to convert short term memory to long term memory overnight. Unfortunately, this is not exactly the case. Short term memory only lasts from 10 to 15 seconds, not an entire day. If the memory isn't converted to long term memory by the end of those 10 to 15 seconds or if the person is not actively reviewing the information from that memory, the person will forget what was in the short term memory at the end of that time. Therefore, it is unlikely that Lucy has this problem. I am unsure, however, what exactly would be the mechanism by which Lucy doesn't remember any day after her accident. Someone in the movie that would have the problem that is associated with Lucy is Ten Second Tom, who only remembers ten seconds at a time. What is it that causes Lucy's anterograde amnesia? Does anyone know?