Head Transplantation: What Makes Us Who We Are?

The Atlantic and the BBC report that 31-year old Valery Spiridonov has a disease that is wasting away his body.   As a last-ditch effort to save his life, he has agreed to a first-of-its-kind surgery that would attach his head to a healthy body that had just died, for example, from a gunshot to the brain.

Whether or not it works (and the quoted mainstream experts predict it won't,) it raises an interesting ethical issue and asks us to consider our identity: What makes us who we are?  
I explore those questions in my PsychologyToday.com article today.