Our senses feed us a tremendous amount of information all the time, but we don't have the bandwidth to pay attention to more than a small fraction of it. That's where the unconscious brain is so valuable, juggling millions of bits of information while we focus our conscious attention on what seems important.
This week, a renowned neurosurgeon shares what he has learned in decades of working to restore ailing brains. His new book covers a vast range of neuroscience. Our dilemma was what to pay attention to in all those options. In a sense, that is always the human situation. We are capable of conscious processing of approximately 200 bits per second (bps) of information. Our unconscious brain deals with as much as 11 million bps.
One surprising outcome of the research on how our brains function is a re-assessment of what is going on when people are unconscious. For centuries, doctors thought there was really no brain activity while a person was comatose. Then, a few decades ago, a scientist was recording the brain waves of a patient in a coma. The activity was very peculiar, as if the person were watching a ball being lobbed back and forth across a tennis court. In actuality, a television set in the room was broadcasting a world championship match between Roger Federer and Rafael Nadal. The neuroscientist recognized that this individual was following the match and was not nearly as deeply unconscious as had been thought. Further research showed that this kind of unconscious brain activity is not uncommon. It may hold keys to determining who has the best potential for recovering from their coma.
