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Hello, I'm joined today by two neurologists, Patrick Wall and Semir Zecki, to look at pain

and subjective experience.

What can our experience of pain tell us about ourselves and about human consciousness. Is each individual

human experience unique or other experiences we say can apply across all of

human consciousness? Patrick Wall is a world expert on the nature of pain and professor of

physiology at St Thomas's Hospital London. He is the co-regenator with Ron

Melzak of the influential gate-control theory of pain, a reversal of the idea that there's a straightforward relationship

between pain and injury. His books include defeating pain, the challenge of pain, and a new book

out this week called simply, Pain, The Signs of Suffering.

Later this year he'll be awarded a Queen's Medal

by the Royal Society.

Professor Samizeki is a renowned neurobiologist

and professor of neurobiology at University College London.

In the 1970s he pioneered the work on vision which caused a revolution in our understanding

of the brain by showing that the brain separated different aspects of vision, form, motion and

color.

Since then, he's examined many different aspects of the brain relating to human consciousness

and art.

He's written about his discoveries in a vision of the brain,

and he has a new book out in the autumn called Inner Vision,

...