By Marcus du Sautoy Professor of mathematics at the University of Oxford

Professor du Sautoy set out to find out the real him

Over the last few months I have been on an extraordinary journey to find out what makes me “me”.

I have had my brain scanned, tricked, electrocuted, drugged in a plethora of different experiments in my attempt to find out what it is that gives me the feeling that there is someone inside my head.

Science calls it the search for consciousness. I call it the search for “me”.

I was not always aware of myself as a human being separate from those around me.

But at what point does this self-awareness kick-in?

“Professor du Sautoy will present BBC Horizon’s The Secret You at 9pm on Tuesday 20 October on BBC Two or afterwards at BBC iPlayer .”

And for those of us not in the UK… FoxyProxy and Tor (pc intructions)