For me the most moving story is 'The Last Hippy'. Greg lost his immediate memory following a massive cerebral tumour. However many times you see him it is always a meeting of strangers. They go to a Grateful Dead concert. Greg is once again a fan. He shouts cheers and sings. Next day the whole experience has gone.
We also read of the Tourette's syndrome sufferer whose tics disappear whenever he begins work - as a surgeon. There is the artist who sees only black and white, the autistic/artistic genius.
This is a gem of a book which deserves to be read over and over. You will learn something new every time.