How did Allie, from the notebook, get amnesia?

I figured it out early in the movie and the only reason I kept watching was to know how she got amnesia. I don't think it ever said. I watched the movie yesterday and it's been bothering me sense.

Oh, and it was a fantastic movie. :')How did Allie, from the notebook, get amnesia?
She didn't get amnesia. She had Alzheimer disease.



http://en.wikipedia.org/wiki/Alzheimer%2鈥?/a>



"As the disease advances, symptoms include confusion, irritability and aggression, mood swings, language breakdown, long-term memory loss, and the general withdrawal of the sufferer as their senses decline."

tallahassee2

ruth chris