Man prepares to undergo world's first head transplant

Computer programmer Valery Spiridonov suffers from a muscle wasting disease   Photo: Courtesy

A Russian man aiming preparing to undergo the world's first head transplant operation has denied he is "crazy" for agreeing to take part.

Computer programmer Valery Spiridonov will fly to New York to meet neurosurgeon Sergio Canavero for the first time this week.