Home
Todd Suomela's Library tagged → View Popular, Search in Google
"For more than a decade, neuroscientists and physiologists have been gathering evidence of the beneficial relationship between exercise and brainpower. But the newest findings make it clear that this isn’t just a relationship; it is the relationship. Using sophisticated technologies to examine the workings of individual neurons — and the makeup of brain matter itself — scientists in just the past few months have discovered that exercise appears to build a brain that resists physical shrinkage and enhance cognitive flexibility. Exercise, the latest neuroscience suggests, does more to bolster thinking than thinking does. "
-
Summary for impatient readers: focus of attention physically determines which synapses in your brain get stronger, and which areas of your cortex physically grow in size. The implications of this provide direct guidance for alteration of behaviors and motivational patterns. This is used for this purpose extensively: for instance, many benefits of the Cognitive-Behavioral Therapy approach rely on this mechanism.
-
Cognitive-Behavioral Therapy has a highly successful approach for breaking habits, which requires only a very subtle alteration to this process. You notice that you are biting your nails. You immediately focus your attention on what you are doing, and you stop doing it. No rage, no blaming yourself, no negative emotions. You just stop, and you focus all the attention you can on the act of stopping. You move your arm down, focusing your attention on the act of movement, on the feeling of your arm going down, away from your mouth. That’s it. You can go back to whatever you were doing.
Five minutes later, you notice yourself biting your nails again. You calmly repeat the procedure again.
By doing this, you are training yourself to perform a new behavior – the “stop and put the hand down” behavior – which is itself triggered by the nail-biting behavior. As you go along, you will get better and better at noticing that you have started to bite your nails. You will also get better and better at stopping and putting your hand down. After a while, this will become semi-automatic; you’ll notice that your hand went to your mouth, a nail touched your tooth, and the hand went back down before you could do anything. Don’t stop training: focus your attention on the “stop and drop” part of the action.
After a while, the nail-biting simply goes away. Of course, the more complex and more ingrained a habit is, the more effort and time will be needed to break it. But for most people, even strong habits can be relatively quickly weakened, or redirected into less destructive behaviors.
"Here is a list of peer reviewed papers that I’ve found that only discuss liberal-conservative differences in brain structure and function, in physiology, or in the kinds of stimuli that attract attention. And of course this is only one small area of research on liberal-conservative differences:"
"Jaroslav Flegr is no kook. And yet, for years, he suspected his mind had been taken over by parasites that had invaded his brain. So the prolific biologist took his science-fiction hunch into the lab. What he’s now discovering will startle you. Could tiny organisms carried by house cats be creeping into our brains, causing everything from car wrecks to schizophrenia? A biologist’s science- fiction hunch is gaining credence and shaping the emerging science of mind- controlling parasites."
"Unrealistic optimism is a pervasive human trait that influences domains ranging from personal relationships to politics and finance. How people maintain unrealistic optimism, despite frequently encountering information that challenges those biased beliefs, is unknown. We examined this question and found a marked asymmetry in belief updating. Participants updated their beliefs more in response to information that was better than expected than to information that was worse. This selectivity was mediated by a relative failure to code for errors that should reduce optimism. "
"Basically, human optimism is a neurological bug that prevents us from remembering undesirable information about our odds of dying or being hurt. And that's why nobody ever believes the apocalypse is going to happen to them."
Recent studies suggest that internet addiction disorder (IAD) is associated with structural abnormalities in brain gray matter. However, few studies have investigated the effects of internet addiction on the microstructural integrity of major neuronal fiber pathways, and almost no studies have assessed the microstructural changes with the duration of internet addiction.
Kids spend an increasing fraction of their formative years online, and it is a habit they dutifully carry into adulthood. Under the right circumstances, however, a love affair with the Internet may spiral out of control and even become an addiction.
Whereas descriptions of online addiction are controversial at best among researchers, a new study cuts through much of the debate and hints that excessive time online can physically rewire a brain.
Cathy N. Davidson, author of the forthcoming book Now You See It: How the Brain Science of Attention Will Transform the Way We Live, Work, and Learn (Viking) could safely be deemed a Never-Better, with perhaps a dash of the Ever-Waser. The major technological changes of the past decade and a half present an array of "exciting opportunities," Davidson argues -- opportunities to promote efficiency, satisfaction and success at every stage from kindergarten through career. If we are inclined to side with the Better-Nevers, worrying that our brains never evolved for shifts of such magnitude -- if kids attend to text messages and video games with alacrity, but fall behind in school, while adults feel swamped by information overload and spread too thin by multitasking -- the trouble, in Davidson's view, is not with all our new technologies, but rather with our failure thus far to adapt and restructure ourselves and our institutions.
"It turns out that when people start tweeting, their number of friends increases until they become overwhelmed. Beyond that saturation point, the conversations with less important contacts start to become less frequent and the tweeters begin to concentrate on the people they have the strongest links with.
So what is the saturation point? Or, in other words, how many people can tweeters maintain contact with before they get overwhelmed? The answer is between 100 and 200, just as Dunbar predicts. "
"In recent years popular science writing has bombarded us with titillating reports of discoveries of the brain’s psychological prowess. Such reports invade even introductory patter in biology and psychology. We are told that the brain — or some area of it sees, decides, reasons, knows, emotes, is altruistic/egotistical, or wants to make love. For example, a recent article reports a researcher’s “looking at love, quite literally, with the aid of an MRI machine.” One wonders whether lovemaking is to occur between two brains, or between a brain and a human being.
There are three things wrong with this talk."
-
These are purely physical systems, but the brain has much in common with them. Networks of brain cells alternate between periods of calm and periods of instability - "avalanches" of electrical activity that cascade through the neurons. Like real avalanches, exactly how these cascades occur and the resulting state of the brain are unpredictable.
It might seem precarious to have a brain that plunges randomly into periods of instability, but the disorder is actually essential to the brain's ability to transmit information and solve problems. "Lying at the critical point allows the brain to rapidly adapt to new circumstances," says Andreas Meyer-Lindenberg from the Central Institute of Mental Health in Mannheim, Germany.
-
The neuronal avalanches that Beggs investigated, for example, are perfect for transmitting information across the brain. If the brain was in a more stable state, these avalanches would die out before the message had been transmitted. If it was chaotic, each avalanche could swamp the brain.
At the critical point, however, you get maximum transmission with minimum risk of descending into chaos. "One of the advantages of self-organised criticality is that the avalanches can propagate over many links," says Beggs. "You can have very long chains that won't blow up on you."
- 1 more annotation(s)...
Selected Tags
Related Tags
Top Contributors
Groups interested in brain
-
Aggregate
Items: 26 | Visits: 54
Created by: Andrew Graff
-
Androids, Zombies and Brains
A collection of bookmarks fo...
Items: 122 | Visits: 68
Created by: Rudy Garns
-
Brain Break
Items: 15 | Visits: 93
Created by: sergio g
Diigo is about better ways to research, share and collaborate on information. Learn more »
Join Diigo