Soup forgot his password Posted August 21, 2012 Author Share Posted August 21, 2012 Dopamine is the completely related to what a lot of people see as a problem here. Couple excerpts from "The Shallows" by Nicholas Carr MICHAEL GREENBERG, IN a 2008 essay in the New York Review of Books, found the poetry in neuroplasticity. He observed that our neurological system, “with its branches and transmitters and ingeniously spanned gaps, has an improvised quality that seems to mirror the unpredictability of thought itself.” It’s “an ephemeral place that changes as our experience changes.”32 There are many reasons to be grateful that our mental hardware is able to adapt so readily to experience, that even old brains can be taught new tricks. The brain’s adaptability hasn’t just led to new treatments, and new hope, for those suffering from brain injury or illness. It provides all of us with a mental flexibility, an intellectual litheness, that allows us to adapt to new situations, learn new skills, and in general expand our horizons. But the news is not all good. Although neuroplasticity provides an escape from genetic determinism, a loophole for free thought and free will, it also imposes its own form of determinism on our behavior. As particular circuits in our brain strengthen through the repetition of a physical or mental activity, they begin to transform that activity into a habit. The paradox of neuroplasticity, observes Doidge, is that, for all the mental flexibility it grants us, it can end up locking us into “rigid behaviors.”33 The chemically triggered synapses that link our neurons program us, in effect, to want to keep exercising the circuits they’ve formed. Once we’ve wired new circuitry in our brain, Doidge writes, “we long to keep it activated.”34 That’s the way the brain fine-tunes its operations. Routine activities are carried out ever more quickly and efficiently, while unused circuits are pruned away. Plastic does not mean elastic, in other words. Our neural loops don’t snap back to their former state the way a rubber band does; they hold onto their changed state. And nothing says the new state has to be a desirable one. Bad habits can be ingrained in our neurons as easily as good ones. Pascual-Leone observes that “plastic changes may not necessarily represent a behavioral gain for a given subject.” In addition to being “the mechanism for development and learning,” plasticity can be “a cause of pathology.”35 It comes as no surprise that neuroplasticity has been linked to mental afflictions ranging from depression to obsessive-compulsive disorder to tinnitus. The more a sufferer concentrates on his symptoms, the deeper those symptoms are etched into his neural circuits. In the worst cases, the mind essentially trains itself to be sick. Many addictions, too, are reinforced by the strengthening of plastic pathways in the brain. Even very small doses of addictive drugs can dramatically alter the flow of neurotransmitters in a person’s synapses, resulting in long-lasting alterations in brain circuitry and function. In some cases, the buildup of certain kinds of neurotransmitters, such as dopamine, a pleasure-producing cousin to adrenaline, seems to actually trigger the turning on or off of particular genes, bringing even stronger cravings for the drug. The vital paths turn deadly. The potential for unwelcome neuroplastic adaptations also exists in the everyday, normal functioning of our minds. Experiments show that just as the brain can build new or stronger circuits through physical or mental practice, those circuits can weaken or dissolve with neglect. “If we stop exercising our mental skills,” writes Doidge, “we do not just forget them: the brain map space for those skills is turned over to the skills we practice instead.”36 Jeffrey Schwartz, a professor of psychiatry at UCLA’s medical school, terms this process “survival of the busiest.”37 The mental skills we sacrifice may be as valuable, or even more valuable, than the ones we gain. When it comes to the quality of our thought, our neurons and synapses are entirely indifferent. The possibility of intellectual decay is inherent in the malleability of our brains. That doesn’t mean that we can’t, with concerted effort, once again redirect our neural signals and rebuild the skills we’ve lost. What it does mean is that the vital paths in our brains become, as Monsieur Dumont understood, the paths of least resistance. They are the paths that most of us will take most of the time, and the farther we proceed down them, the more difficult it becomes to turn back. WHAT DETERMINES WHAT we remember and what we forget? The key to memory consolidation is attentiveness. Storing explicit memories and, equally important, forming connections between them requires strong mental concentration, amplified by repetition or by intense intellectual or emotional engagement. The sharper the attention, the sharper the memory. “For a memory to persist,” writes Kandel, “the incoming information must be thoroughly and deeply processed. This is accomplished by attending to the information and associating it meaningfully and systematically with knowledge already well established in memory.”35 If we’re unable to attend to the information in our working memory, the information lasts only as long as the neurons that hold it maintain their electric charge—a few seconds at best. Then it’s gone, leaving little or no trace in the mind. Attention may seem ethereal—a “ghost inside the head,” as the developmental psychologist Bruce McCandliss says36—but it’s a genuine physical state, and it produces material effects throughout the brain. Recent experiments with mice indicate that the act of paying attention to an idea or an experience sets off a chain reaction that crisscrosses the brain. Conscious attention begins in the frontal lobes of the cerebral cortex, with the imposition of top-down, executive control over the mind’s focus. The establishment of attention leads the neurons of the cortex to send signals to neurons in the midbrain that produce the powerful neurotransmitter dopamine. The axons of these neurons reach all the way into the hippocampus, providing a distribution channel for the neurotransmitter. Once the dopamine is funneled into the synapses of the hippocampus, it jump-starts the consolidation of explicit memory, probably by activating genes that spur the synthesis of new proteins.37 The influx of competing messages that we receive whenever we go online not only overloads our working memory; it makes it much harder for our frontal lobes to concentrate our attention on any one thing. The process of memory consolidation can’t even get started. And, thanks once again to the plasticity of our neuronal pathways, the more we use the Web, the more we train our brain to be distracted— to process information very quickly and very efficiently but without sustained attention. That helps explain why many of us find it hard to concentrate even when we’re away from our computers. Our brains become adept at forgetting, inept at remembering. Our growing dependence on the Web’s information stores may in fact be the product of a self-perpetuating, self-amplifying loop. As our use of the Web makes it harder for us to lock information into our biological memory, we’re forced to rely more and more on the Net’s capacious and easily searchable artificial memory, even if it makes us shallower thinkers. The changes in our brains happen automatically, outside the narrow compass of our consciousness, but that doesn’t absolve us from responsibility for the choices we make. One thing that sets us apart from other animals is the command we have been granted over our attention. “‘Learning how to think’ really means learning how to exercise some control over how and what you think,” said the novelist David Foster Wallace in a commencement address at Kenyon College in 2005. “It means being conscious and aware enough to choose what you pay attention to and to choose how you construct meaning from experience.” To give up that control is to be left with “the constant gnawing sense of having had and lost some infinite thing.”38 A mentally troubled man—he would hang himself two and a half years after the speech— Wallace knew with special urgency the stakes involved in how we choose, or fail to choose, to focus our mind. We cede control over our attention at our own peril. Everything that neuroscientists have discovered about the cellular and molecular workings of the human brain underscores that point. Socrates may have been mistaken about the effects of writing, but he was wise to warn us against taking memory’s treasures for granted. His prophecy of a tool that would “implant forgetfulness” in the mind, providing “a recipe not for memory, but for reminder,” has gained new currency with the coming of the Web. The prediction may turn out to have been merely premature, not wrong. Of all the sacrifices we make when we devote ourselves to the Internet as our universal medium, the greatest is likely to be the wealth of connections within our own minds. It’s true that the Web is itself a network of connections, but the hyperlinks that associate bits of online data are nothing like the synapses in our brain. The Web’s links are just addresses, simple software tags that direct a browser to load another discrete page of information. They have none of the organic richness or sensitivity of our synapses. The brain’s connections, writes Ari Schulman, “don’t merely provide access to a memory; they in many ways constitute memories.”39 The Web’s connections are not our connections—and no matter how many hours we spend searching and surfing, they will never become our connections. When we outsource our memory to a machine, we also outsource a very important part of our intellect and even our identity. William James, in concluding his 1892 lecture on memory, said, “The connecting is the thinking.” To which could be added, “The connecting is the self.” As far as "integrating technology into our lives" When you look at every single piece of technology that has come along in America since the 18th century, it has always been a case of "integrating our lives into technology" In the 1800's, the printed word held a monopoly on public discourse. Then the telegraph did. Then the telephone. Then the radio. In the 1980's it was clearly the television. Today i would argue that the television still holds the throne of "public discourse monopolist" since the GOP primaries is still a tv show, and any media on the internet about our own presidential candidacy is owned and controlled by the same TV broadcasters that have controlled television from the beginning. That may sound like a conspiracy, NBC, CBS and their subsidiaries see themselves as a public utility service like the post office and electricity and I can find direct quotes from their CEO's of this if requested. Edit: Fora.tv is one of those sites that keep me on the internet. Check it out. "Has Malcolm Gladwell's Opinion on Social Media and the Arab Spring Changed?" - Quote Link to comment Share on other sites More sharing options...
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