I've just come across an audio recording of patient H.M. - Henry Molaison - whose story was one of the things that inspired Before I Go to Sleep. In writing the book I tried very hard not to trivialise his story, or that of any of the other amnesiac patients whose lives are so devastated, and in a weird way he came to mean a lot to me. Hearing his voice was very odd indeed.
It's fascinating, and well worth a listen. The link is here.