In this video Vilayanur Ramachandran introduces his work and discusses his most exciting current projects.

Vilayanur Ramachandran is Director of the Center for Brain and Cognition at the University of California, San Diego. He has been described as the Marco Polo of neuroscience, thanks to pioneering (and often controversial) research into phantom limbs, mirror neurons and neuroplasticity. He spoke to A C Grayling about the limits of what we know about human consciousness.

Exchanges at the Frontier with Vilayanur Ramachandran was recorded at Wellcome Collection and was first broadcast on the World Service on 3 December2011.