Brain
in sentence
4290 examples of Brain in a sentence
It is just a large primate
brain.
Well, other people have figured out how much energy the human
brain
and that of other species costs, and now that we knew how many neurons each
brain
was made of, we could do the math.
So the total energetic cost of a
brain
is a simple, linear function of its number of neurons, and it turns out that the human
brain
costs just as much energy as you would expect.
So the reason why the human
brain
costs so much energy is simply because it has a huge number of neurons, and because we are primates with many more neurons for a given body size than any other animal, the relative cost of our
brain
is large, but just because we're primates, not because we're special.
Last question, then: how did we come by this remarkable number of neurons, and in particular, if great apes are larger than we are, why don't they have a larger
brain
than we do, with more neurons?
When we realized how much expensive it is to have a lot of neurons in the brain, I figured, maybe there's a simple reason.
We calculated on the one hand how much energy a primate gets per day from eating raw foods, and on the other hand, how much energy a body of a certain size costs and how much energy a
brain
of a certain number of neurons costs, and we looked for the combinations of body size and number of
brain
neurons that a primate could afford if it ate a certain number of hours per day.
Well, if our
brain
costs just as much energy as it should, and if we can't spend every waking hour of the day feeding, then the only alternative, really, is to somehow get more energy out of the same foods.
So because of cooking, what once was a major liability, this large, dangerously expensive
brain
with a lot of neurons, could now become a major asset, now that we could both afford the energy for a lot of neurons and the time to do interesting things with them.
So I think this explains why the human
brain
grew to become so large so fast in evolution, all of the while remaining just a primate
brain.
With this large
brain
now affordable by cooking, we went rapidly from raw foods to culture, agriculture, civilization, grocery stores, electricity, refrigerators, all of those things that nowadays allow us to get all the energy we need for the whole day in a single sitting at your favorite fast food joint.
Studying the human
brain
changed the way I think about food.
Firstly, there are several hormone-producing glands: three in your brain, and seven in the rest of your body.
That’s because hormones can influence the production of certain chemicals in the brain, like serotonin.
But research shows that our behavior is collectively shaped by a variety of influences, including the
brain
and its neurotransmitters, our hormones, and various social factors.
But of course there are skeptics who say if we look at the evidence of science, particularly neuroscience, it suggests that your mind, your essence, the real you, is very much dependent on a particular part of your body, that is, your
brain.
If you have
brain
cancer, and you say that standing on your head for 20 minutes every morning makes you feel better, it may make you feel better, but you still have
brain
cancer, and you'll still probably die from it.
"But," he said to me, "I heard about a protocol at Mass General for a procedure called a cingulotomy, which is a
brain
surgery, and I think I'm going to give that a try."
I felt that funeral in my brain, and I sat next to the colossus at the edge of the world, and I have discovered something inside of myself that I would have to call a soul that I had never formulated until that day 20 years ago when hell came to pay me a surprise visit.
And all this past year in training, I had that Teddy Roosevelt quote to paraphrase it, floating around in my
brain.
What most people don't realize is that hunger and energy use are controlled by the brain, mostly without your awareness.
Your
brain
also has its own sense of what you should weigh, no matter what you consciously believe.
The hypothalamus, the part of the
brain
that regulates body weight, there are more than a dozen chemical signals in the
brain
that tell your body to gain weight, more than another dozen that tell your body to lose it, and the system works like a thermostat, responding to signals from the body by adjusting hunger, activity and metabolism, to keep your weight stable as conditions change.
Your
brain
works exactly the same way, responding to weight loss by using powerful tools to push your body back to what it considers normal.
If you lose a lot of weight, your
brain
reacts as if you were starving, and whether you started out fat or thin, your
brain'
s response is exactly the same.
We would love to think that your
brain
could tell whether you need to lose weight or not, but it can't.
Even after you've kept the weight off for as long as seven years, your
brain
keeps trying to make you gain it back.
If you stay at a high weight for too long, probably a matter of years for most of us, your
brain
may decide that that's the new normal.
It's like aliens have taken over my
brain.
So, he was occupying every part of my
brain.
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