Oliver Sacks fell into the latter category ... severe headache sufferers became the material for his first book, “Migraine.” The approach was a methodological apostasy among many headache ...

But Oliver Sacks is one of the great modern adventurers ... tactile hallucinations (every one of the five senses is vulnerable); his own migraine hallucinations; and, of course, hallucinations ...

When Oliver Sacks died in 2015 ... In 1967, when stoned, he “saw the neurological heavens open before me, and migraine shining like a beautiful constellation.” The scientist was in part ...