Oh, you.

Sacks (I repeat, Sacks) did not supply the answers to these questions. The Man Who Mistook, etc. is in essence a book of clinical descriptions.

>But he as a dedicated and expert neurologist admits that many mysteries of the brain remain as yet hidden.

An understatement. I have read a few books on the brain and they all agree: When it comes right down to it, very, very little is known about it. In particular I direct your attention to the chapter "What We Know, What We Might Know, And What We Can't Know" in "The 21st-Century Brain" by Steven Rose and "Phantoms in the Brain" by V. Ramachandran.