I bet you haven’t gone thinking about neuroscience in ages, possibly longer, which is fine, but it’d be pretty caddish of you neuroscientists out there to take me up on the bet. You should have better things to do than pick quarrels over my rhetorical tricks anyway. That’s something for the advance team of offensive forensics experts to be doing. Let them have their glory.
Anyway, the neat thing about neuroscience is that most of what anyone knows about it is wrong, and what they know that isn’t wrong is so misleading it would be easier if it were just wrong instead. For example, everyone has heard about how we only use ten percent of our brain. What’s misleading about this point is that we don’t say what it is we use that ten percent of our brains for. Some use it for thinking, some use it for light crafts, some use it as a place to keep the spatulas. It’s the other ninety percent that ought to interest us, because that’s the part the brain is using for its own purposes, and it’ll tell us what those are only when it’s good and ready.
One of the greatest breakthroughs in understanding the workings of the brain came about in a horrible railroad construction accident on September 13, 1848, a mere 145 years to the day before the debut of Late Night With Conan O’Brien, which hasn’t got anything to do with this. But in 1848 one Phineas Gage was doing some railroad construction thing of the kind they did in 1848 when it exploded and sent a long metal bar through his head. Amazingly, Gage lived, but his personality was radically changed. Whereas before he was comfortable holding his head high and looking around at people, suddenly he did a lot more staring down at his shoes. And according to reports, while he had in the past walked into rooms of all sorts the way anyone does, afterward he could only enter by turning his head or, better, his whole body to the side and sneaking in. “Clearly,” thought doctors, “the metal bar in his head has altered his mental state. He seems to now believe he’s in California,” which was correct. Thus metal bars clearly don’t diminish one’s ability to tell whether one has moved from Vermont to San Francisco, but neuroscientists hope to find something which will. “We’re not sure,” they said recently at a conference in Rutland, California, “But we think fiddling with Google Maps will do it.” It’s worth nothing that Gage also grew a lot angrier around people with magnets, which is one of the reasons he stopped hanging around refrigerator doors.
More recent and important breakthroughs came in the 1950s and 1960s when the corpus callosum, the connections between the hemispheres, in brains of certain epileptic patients was experimentally severed. If one then showed a picture of, say, a paper clip to the right eye, controlled by the left hemisphere, then the nations of the Western hemisphere would think they were seeing a paper clip, while the nations of the Eastern hemisphere would just get all tense from the idea that someone was trying to clip their papers but not know why. While these were startling results, the resulting increase in world tension was judged not to be worth it, especially after science fiction writers began publishing satires of how the world would get blown up over a tragic clip-related misunderstanding, and we bought everybody staples under the Great Stapling program. The inability of the world’s markets to produce enough staplers would result in a crisis in 1974, but nobody noticed because there was too much else going on.
The newest approach to understanding the brain’s functioning is to measure how much oxygen different parts consume while the brain does work, because we got some great brain-part-oxygen-consumption machines in the mail and since we didn’t order them, we get to keep them for free, because we remember those public service announcements where the Eskimo gets an electric fan in the mail. It turns out the brain uses oxygen the most rapidly when it has to haul a wheelbarrow full of pebbles out to the garden, then slightly less rapidly when it’s using a block-and-tackle system to pull an engine mount out of a car, and the least oxygen of all when the brain is trying to blow a fly off the table by blowing at it. These results have surprised nearly everybody except the flies.