Isn't it cool when people walk around?
No, I didn't leave anything out of the sentence. They don't have to be doing anything special to be amazing, juggling chainsaws or doing card tricks or something. Just, walking around.
I have a four-year-old daughter who loves animals. Whenever she sees a creature that she hasn't seen before and it starts to move, she giggles. She gets so excited that the puppy or the turtle or the squirrel is moving! A little while I was walking from room to room, remembered something I had forgotten, paused to decide whether to go get it, and then turned around and went back to get it. When I did that, like a four-year-old watching a kitten walk, I suddenly became conscious of the specialness of it.
Have you ever thought about how many muscles have to work in concert for you to walk across the room? Some quick Googling returns the number 200 from a couple of sources, and I don't doubt it. I think there are only about five muscles in your leg, but what about all of the muscles that are constantly adjusting your spine, toes, feet, and all of the other parts of your body to keep you balanced and moving forward? And I didn't just move forward... I moved forward, stopped, remained balanced for a moment, then turned my whole body and walked in the other direction. At every point in that operation, many muscles were involved in keeping me doing what I wanted to do. At any time, one of those muscles could have done something different, and I would have been lying on the floor (or bashing into a wall or door, or whatever) instead of walking across the room. Mundane, you say? No! It's positively amazing! (Just ask anyone who has ever tried to design a two-legged walking robot!)
Why am I mentioning all this? Because to me, even something as simple as walking points to God. There's no way a system like the human body would have occurred by chance. People who would say "isn't it amazing how Nature designed our bodies like that?" are simply refusing to use the word "God" for the creator and using the word "Nature" instead, which doesn't really make any sense unless you're talking about "Mother Nature" and then you've just tipped your hat to pantheism, not atheism. Then again, I'm the guy who doesn't believe in the existence of atheists, so maybe I'm not the guy to apply those labels. Wait, where was I going with this again?
Oh yeah: your body is amazing. And I'm not just saying that because you are so good-looking, because everybody knows that the people who read this blog are SMOKIN' good looking! But even if you weren't so incredibly attractive, your body would still be an amazing creation by an amazing God. And when you stand up and walk away from whatever you're reading this on, I hope you are reminded of that with every step.
Showing posts with label biology. Show all posts
Showing posts with label biology. Show all posts
Friday, April 27, 2012
Friday, October 8, 2010
Shallow Waters
I'm reading a book called The Shallows: What the Internet Is Doing to Our Brains by Nicholas Carr. The book sprang from an article in The Atlantic Magazine entitled Is Google Making Us Stupid? The basic premise of the article, and of the book so far (although I've got some distance to go before I'm finished) is that our fast-paced, plugged-in, sound-bytes-on-YouTube and 140-characters-or-less-on-Twitter straight-to-your-cell-phone-or-iPad-whichever-is-faster world, people are actually losing their ability to concentrate on one thing for an extended period of time. It's been very interesting reading; maybe I'll share my take on the entire thing here once I'm done with the book. But one part I read this morning rang a bell for me, and I thought you might find it interesting.
The second chapter discusses the "plasticity" of the human brain, meaning whether or not the adult brain can "change" itself, or whether the brain is "wired up" in childhood in such a way that it is unable to physically modify its neural passageways later on. Apparently, for most of history, the brain was thought to be unchangeable after childhood, but in the second half of the 20th century, researchers began to discover that the brain does indeed "rewire" itself, even in adults. For example, if a person loses a limb, the part of the brain that previously was used to control that limb, accept sensory input from that limb, etc. is soon re-purposed for other tasks. That's most likely the reason that blind people often develop sharper sense of hearing, smell, etc. than sighted people; their brains have reused the visual cortex for something else. In fact, there have been experimental therapies used on people who have lost the use of some part of their bodies due to strokes or other head injuries that indicate that if you perform repetitive tasks with that part of the body often enough, you can begin to regain your use of it. Your brain is sensing that you need some power for that body part, and it's sending reinforcements out to work on it. A part of your brain that you are not using for something else is being given the chance to come into use.
What really stuck with me, though, was a section that started with "It's not just repeated physical actions that can rewire our brains. Purely mental activity can also alter our neural circuitry, sometimes in far-reaching ways." It goes on to tell about a study of London cab drivers that showed that people who spend their days performing the spatially-intense task of driving have larger posterior hippocampuses (the part of the brain that handles spatial representations of the person's surroundings). The part of their brains that they constantly stimulate begins to develop. Then it talks about another study in which people with no experience playing piano were taught to play a simple melody, and then one group was told to practice the melody on a piano for a certain amount of time per day, and another group was told to think about playing the song, sitting at a piano, for the same amount of time. Both groups experienced the same kinds of changes in their brains. "Their brains had changed in response to actions that took place purely in their imagination—in response, that is, to their thoughts," Carr reports. "We become, neurologically, what we think."
That the human brain can be physically changed should not be too much of a surprise to any Christian. Romans 12:2 says "Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect." Obviously, the way to find out the will of God is to spend time in the Word of God and in prayer, so that verse tells us that our mind can be "transformed" and "renewed" if we do so. By the repetitive action of reading God's Word, studying it, thinking about it, going over and over its basic teachings, submitting our lives to God in prayer and worship, even science tells us that we can "change our minds" and make them work in a certain way. Wouldn't it be great if your mind could operate in such a way that God's thoughts became your thoughts? That's not the way it is naturally, you know. But by spending time with God, using our brains to think about His ways, we can "become what we think." If you approach God with an open heart, He will pour His life into you, and you will be transformed. Your mind will begin to think in terms of God's ways. You might even find things that are not of God less desirable, as His desires become yours. Get into the habit! You'll be glad you did!
The second chapter discusses the "plasticity" of the human brain, meaning whether or not the adult brain can "change" itself, or whether the brain is "wired up" in childhood in such a way that it is unable to physically modify its neural passageways later on. Apparently, for most of history, the brain was thought to be unchangeable after childhood, but in the second half of the 20th century, researchers began to discover that the brain does indeed "rewire" itself, even in adults. For example, if a person loses a limb, the part of the brain that previously was used to control that limb, accept sensory input from that limb, etc. is soon re-purposed for other tasks. That's most likely the reason that blind people often develop sharper sense of hearing, smell, etc. than sighted people; their brains have reused the visual cortex for something else. In fact, there have been experimental therapies used on people who have lost the use of some part of their bodies due to strokes or other head injuries that indicate that if you perform repetitive tasks with that part of the body often enough, you can begin to regain your use of it. Your brain is sensing that you need some power for that body part, and it's sending reinforcements out to work on it. A part of your brain that you are not using for something else is being given the chance to come into use.
What really stuck with me, though, was a section that started with "It's not just repeated physical actions that can rewire our brains. Purely mental activity can also alter our neural circuitry, sometimes in far-reaching ways." It goes on to tell about a study of London cab drivers that showed that people who spend their days performing the spatially-intense task of driving have larger posterior hippocampuses (the part of the brain that handles spatial representations of the person's surroundings). The part of their brains that they constantly stimulate begins to develop. Then it talks about another study in which people with no experience playing piano were taught to play a simple melody, and then one group was told to practice the melody on a piano for a certain amount of time per day, and another group was told to think about playing the song, sitting at a piano, for the same amount of time. Both groups experienced the same kinds of changes in their brains. "Their brains had changed in response to actions that took place purely in their imagination—in response, that is, to their thoughts," Carr reports. "We become, neurologically, what we think."
That the human brain can be physically changed should not be too much of a surprise to any Christian. Romans 12:2 says "Do not be conformed to this world, but be transformed by the renewal of your mind, that by testing you may discern what is the will of God, what is good and acceptable and perfect." Obviously, the way to find out the will of God is to spend time in the Word of God and in prayer, so that verse tells us that our mind can be "transformed" and "renewed" if we do so. By the repetitive action of reading God's Word, studying it, thinking about it, going over and over its basic teachings, submitting our lives to God in prayer and worship, even science tells us that we can "change our minds" and make them work in a certain way. Wouldn't it be great if your mind could operate in such a way that God's thoughts became your thoughts? That's not the way it is naturally, you know. But by spending time with God, using our brains to think about His ways, we can "become what we think." If you approach God with an open heart, He will pour His life into you, and you will be transformed. Your mind will begin to think in terms of God's ways. You might even find things that are not of God less desirable, as His desires become yours. Get into the habit! You'll be glad you did!
I have stored up your word in my heart,
that I might not sin against you. (Psalm 119:11 ESV)
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