6
" Language and hearing are seated in the cerebral cortex, the folded gray matter that covers the first couple of millimeters of the outer brain like wrapping paper. When one experiences silence, absent even reading, the cerebral cortex typically rests. Meanwhile, deeper and more ancient brain structures seem to be activated--the subcortical zones. People who live busy, noisy lives are rarely granted access to these areas. Silence, it appears, is not the opposite of sound. It is another world altogether, literally offering a deeper level of thought, a journey to the bedrock of the self. "
― Michael Finkel , The Stranger in the Woods: The Extraordinary Story of the Last True Hermit
20
" These computer simulations try only to duplicate the interactions between the cortex and the thalamus. Huge chunks of the brain are therefore missing. Dr. [Dharmendra] Modha understands the enormity of his project. His ambitious research has allowed him to estimate what it would take to create a working model of the entire human brain, and not just a portion or a pale version of it, complete with all parts of the neocortex and connections to the senses. He envisions using not just a single Blue Gene computer [with over a hundred thousand processors and terabytes of RAM] but thousands of them, which would fill up not just a room but an entire city block. The energy consumption would be so great that you would need a thousand-megawatt nuclear power plant to generate all the electricity. And then, to cool off this monstrous computer so it wouldn't melt, you would need to divert a river and send it through the computer circuits.It is remarkable that a gigantic, city-size computer is required to simulate a piece of human tissue that weighs three pounds, fits inside your skull, raises your body temperature by only a few degrees, uses twenty watts of power, and needs only a few hamburgers to keep it going. "