As a practicing neurologist, I place central importance in applying current science to the notion of disease prevention.

We have a habit of turning to scientists when we want factual answers and artists when we want entertainment, but where are the facts about the nature of the self? Neurologists peering at PET scans and fMRIs know they aren't seeing the soul in there.

The neurologist calls it 'Non-REM parasomnia'. For the sufferer, it might mean rising in the middle of the night, getting your motorbike out, going for a ride, and waking in the morning with no memory of the experience.