Consciousness is the assumption that because we in the state of mind where we can acknowledge, respond and interpret our surroundings. But how do we determine that’s consciousness. Our brain never sleep always active. When we are asleep It uses memories and the surroundings to create dreams. I think the brain action does not necessarily indicative of the wake or sleep mode. Just like you only know it’s a dream when you are consciously in the wake mood. But does it make a difference to the brain. The brain is active regardless.