Many people, at some stage of their life, worry about sleep: are they getting enough of it? Or even, too much? Derk-Jan Dijk is Professor of Sleep and Physiology at University of Surrey. His current research interests include the contribution of sleep to brain function in healthy ageing and dementia; the role of circadian rhythms in sleep regulation; negative effects of sleep loss; understanding age and sex related differences in sleep physiology and developing tests to monitor sleep. In this podcast he discusses these issues and the future direction of the discipline with Owen Bennett-Jones.

Owen Bennett-Jones is a freelance journalist and writer. A former BBC correspondent and presenter he has been a resident foreign correspondent in Bucharest, Geneva, Islamabad, Hanoi and Beirut. He is recently wrote a history of the Bhutto dynasty which was published by Yale University Press.

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