Antti Revonsuo is a Finnish cognitive neuroscientist, psychologist, and philosopher of mind. His work seeks to understand consciousness as a biological phenomenon. He is one of a small number of philosophers running their own laboratories. Currently, Revonsuo is a professor of cognitive neuroscience at the University of Skövde in Sweden and of psychology at the University of Turku in Finland. His work focuses on altered states of consciousness in general and dreaming in particular. He is best known for his Threat Simulation Theory, which – in the tradition of evolutionary psychology – states that dreams serve the biological function of rehearsing possibly threatening situations in order to aid survival, and his advocacy of the dreaming brain as a model of consciousness.