What relevance does consciousness have for our understanding of mental conditions? Geraint Rees, deputy head of the UCL Faculty of Brain Sciences, tells Peter Halligan, professor in the School of Psychology, Cardiff University, about his work in the area.This podcast was recorded at the British NeuroPsychiatry Association\u2019s 2013 AGM. For more information on the association and next year\u2019s meeting, see bnpa.org.uk.