What gives rise to what we call consiousness? As I can't think of a better definition of consciousness than subjective experience (emotion, feeling), we can use that unless someone comes up with something better. What functions and structures of brains yield or are associated with consciousness? Is there anywhere in the animal kingdom where we can make distinctions between consciousness, unconscious, and perhaps semi-conscious (if that makes any sense)? I am interested in a scientific discussion of neurology.