I read a different article about him and did a paper on it. The piano playing seems miraculous, but it is the patterns his brain remembers. He didn't recognize his wife at first either. So he retains some bits subconsciously. We do so many things without realizing it and build patterns. He gets frustrated and had to be live in an institution for a bit because of the care he needed. His bright spots were Deborah's visits. I think that it would be frustrating to continually feel like you just woke up. He was an accomplished musician.