Culture on the Teen Brain

Harvard Magazine has a short piece this month on the work of neurologists Frances Jensen and David Urion to popularize information about the “teen brain” to audiences. As Jensen says, “This is the first generation of teenagers that has access to this information, and they need to understand some of their vulnerabilities.”

That information? That, given the way their brain is maturing (both fast-growing synapses and other sections relatively unconnected), adolescents are more “easily influenced by their environment and more prone to impulsive behavior.” As expected, there follows a typical line of parental angst: the sexes are different, drugs harm brains, kids need to sleep and get exercise, they are suffering from sensory overload from all the new technology. By implication, it is all due to being in “this paradoxical period in brain development.”

Certainly there are some intriguing results about brain development in adolescent related to differential brain maturation, developmental plasticity, and the like. Some early research based on longitudinal research is summarized here in an NIMH press release, which concludes in better fashion: “the teenage brain is a very complicated and dynamic arena, one that is not easily understood,” whether for parents or for researchers. But as I covered earlier in a post on emotion and decision making, teenagers can actually be seen as rather good decision makers, just focused on differential goals and contexts than most adults.

And come on, teenagers are overwhelmed by information and multitasking in today’s “brave new world”? I wish I had half the skills that my incoming freshmen display in this arena-I’m the one who doesn’t quite know how to handle the sensory overload…

Another graphic accompanies the Harvard article (only in the pdf though), an illustration by Leslie Cober-Gentry. For me, it shows the enormous gap between the brain imaging graphic and this more cultural graphic. As with all imaging research, there can only be correlations between level of activity and a particular task at hand. But that equation leaves out all the other important correlations that exists between, say, being impulsive and a particular environmental context. The juxtaposition of the two images capture perfectly what Urion and Jensen do, project our everyday life and concerns onto our newest explanatory cause-the brain.

Foxy Evolution

Here’s a great video that shows how selection can work its effects–in this case artificial selection, demonstrated through the work of the Russian Dmitri Belyaev and his tame silver foxes. Still, what I find most striking about this video is the analogy to ourselves.

Jim Rilling, a neuroanthropologist at Emory, once commented to me that humans are wired to cooperate (in his latest work, he’s doing neuro-imaging on what happens when people don’t reciprocate, having researched the neural bases of cooperation earlier). The example Jim used has stuck with me ever since. Imagine 50 chimpanzees trying to sit down and watch an introductory lecture together. Pandemonium with those chimps. For us, it’s the most mundane sort of thing. People do it everyday around the world.

Continue reading “Foxy Evolution”

Wednesday Round Up #26


Anthropology

Brandon Keim, Culture Shapes How People See Faces
New research on East Asian/Western contrast in facial perception using eye tracking. Has this great graphic! And includes this important quote: “We tested some Chinese who had been in Glasgow for three or four years, and you see a clear difference between them and those who just arrived,” he said. “That really demonstrates that it’s not genetic. It’s experience.”
For more detail on the study, see Ed Yong’s piece “Westerners Focus on the Eyes, East Asians on the Nose

LL Wynn & Nikki Kuper, Annotated Bibliography on HTS, Minerva and PRISP
A comprehensive listing of resources on the US Army’s Human Terrain Systems and other efforts to engage social science (and in many minds, subvert and corrupt it). Erkan Saka offers some more links, as well as other interesting anthro stuff, in one of his round-ups.

Somatosphere, Web Gleanings 2
Another round up from the new med anthro blog – quite a collection!

Disparate, Enthused Tech
Slideshow and blog post on enthusiasm in learning, especially through technology. Another Anthro Blog provides some enthusiastic reaction.

Antropologi, Open Access: New Alliances Threaten the American Anthropological Association
Did the AAA make the wrong choice in hiding its online publications away?

Madeleine Coorey, Prehistoric Giant Animals Killed by Man, Not Climate: Study
In Tasmania, the climate was stable so recently arrived humans become the main suspects in the disappearance of giant kangaroos

Roger Cohen, News Good Enough to Be Buried
Nice op-ed: “In my lifetime, conditions have grown immeasurably better, freer and more prosperous for a majority of humanity, yet hand-wringing about the miserable remains the reflex mode for most coverage of planet earth.”

Randolph Schmid, Monkeys Reward Friends and Relatives
Better to give and receive rather than just give—the importance of building relationships and reciprocity

Brain

Arthur Shapiro, 100th Anniversary of “A New Visual Illusion of Direction”
Another great one from Illusion Sciences—clicking on the red lines really made the difference! And we get plenty of added intellectual background too!

Continue reading “Wednesday Round Up #26”

Slate Video: Can Apes Really Talk?

John Cohen at Slate interviews researchers at the Great Ape Trust, a bastion of ape language research, as well as some of their skeptics about their claims for ape language. If you wnat more, Wikipedia provides some general background on ape language research.

What I find fascinating in this research: the revelations about cognition, symbolic abilities, and grammar, all helping to show us that the gap we set between ourselves and one of our favorite “others” is not so great as generally thought. On the other hand, the incredible physiological and neurological skills that go into the production of human speech show the strong selective pressures that existed during our human evolution.

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List of Topical Round Ups

Here are all the topical round ups I’ve done over the previous months, a complement to the more varied weekly round ups (first twenty of those outlined here). With classes starting on Tuesday and some academic writing that needs to get done, I am not planning to do more of these topical summaries.

However, if anyone out there is interested in doing one (or having their students develop one), please contact me, Daniel Lende, dlende at nd.edu. There are lots of subjects that could be covered—social neuroscience, ritual, behavioral economics, mirror neurons…

Cultural Evolution

Neurocriticism

Sports

Anthropology and Social Design

Drugs

Addiction

Diet, Weight and Health

Evolution

Anthropology

Video Games: Gaming Overview

Video Games #2: Social Science and Design

Video Games, Brain and Psychology