Existe un continuo de estados entre el dormir profundo y la vigilia. Summary: There are not just three states of consciousness, but a continuum between deep sleep and wakefulness. Consciousness can exist in non-REM sleep, daydreams, and various stages of sleep. Even when sleep-deprived, individual brain cells can fall asleep while the person may appear awake, experiencing micro-sleeps. Transcript: Speaker 1 So we used to think absent of anesthesia that there were already three main states of consciousness who was being awake, being in non-rapid eye movement, sleep or non-dream sleep, And then being in rapid eye movement, sleep or dream sleep. And those were the three states within which your brain could percolate and be conscious. You know, conscious during non-rem sleep is maybe a stretch to say, but I still believe there is plenty of consciousness there. I don’t believe that there were any more. And the reason is because we can have daydreams and we are in a very different wakeful state in those daydreams than we are when we are, as we are now, together present and extraceptively Focused rather than intraceptively focused. And then we also know that as you are sort of progressing into those different stages of sleep during non-rem sleep, you can also still dream. It depends on your definition of dreaming, but we seem to have some degree of dreaming in almost all stages of sleep. We’ve also then found that when you are sleep deprived, even individual brain cells will fall asleep. Despite the animal being, you know, behaviorally from best we can tell awake, individual brain cells and clusters of brain cells will go into a sleep-like state. And humans do this too. When we are sleep deprived, we have what are called micro-sleeps, where the eyelid will partially close and the brain essentially falls lapses into a state of sleep. (Time 0:20:29)