The deep secret of the brain is that not only the spinal cord but the entire central nervous system works this way: internally generated activity is modulated by sensory input. In this view, the difference between being awake and being asleep is merely that the data coming in from the eyes anchors the perception.
David EaglemanThere is a looming chasm between what your brain knows and what your mind is capable of accessing.
David EaglemanAll creation necessarily ends in this: Creators, powerless, fleeing from the things they have wrought.
David EaglemanIf you measure someone's brain and see very little activity during a task, it does not necessarily indicate that they're not trying - it more likely signifies that they have worked hard in the past to burn the programs into the circuitry. Consciousness is called in during the first phase of learning and is excluded from the game playing after it is deep in the system.
David Eagleman