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Evidence of those social relationships exist in the brain ..

The social brain

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The Social Brain Hypothesis by A J, Jones - issuu

Dunbar, an evolutionary psychology professor at Oxford University, gained some measure of fame more than 20 years ago for his research on the size of animals' social networks. Each species of primate, he found, can manage to keep up a social bond with a certain number of other members of its own species. That number goes up as primates' brain size increases, from monkeys to apes.

The Social Mind: Brain Region Bigger in Popular People

Evolutionary anthropologists study social groups in animals. One question they have been trying to answer, is whether there is a limit on how many individuals different species have in their social group. Robin Dunbar studied the relationship between brain (neo-cortex) size and the number of stable relationships that a species had in their social groups.

The "social brain hypothesis" holds that the reason ..

The Social Brain Hypothesis: Are our brains hardwired …

Likewise, if someone lacks the basic brain space to judge other's mental states, they'll likely struggle to maintain social ties, Dunbar said. But if the hardware is in place, using it may beef it up, especially during youth, when the brain is especially open to growth and change.

Certainly, Dunbar said, a functional orbital prefrontal cortex is key for understanding social situations — people with damage to these regions are notoriously bad at interacting with others. But the ultimate size of any brain region depends in part on how that area is used during childhood.

The Social Brain Hypothesis: Are our brains hardwired to ..

11 thoughts on “The Social Brain ..

Looking at these factors — size of social network, brain anatomy and ability to mentalize — uncovered a trio of links between all three. People with seem to have larger orbital prefrontal cortexes, the researchers found. This area of the brain sits right behind the eyes and is responsible for directing appropriate social behavior and interactions with others.

These factors associated with the psychological effects of sleep apnea can be controlled to a certain degree and improve the outcome people have while living with this condition.

The neocortex, also called the neopallium and isocortex, is the part of the mammalian brain involved in higher-order brain functions such as sensory perception, cognition, generation of motor commands, spatial reasoning and language.
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Evolutionary Psychology | Internet Encyclopedia of Philosophy

Looking at his grooming data, Dunbar made the mental leap to humans. “We also had humans in our data set so it occurred to me to look to see what size group that relationship might predict for humans,” he told me recently. Dunbar did the math, using a ratio of neocortical volume to total brain volume and mean group size, and with a number. Judging from the size of an average human brain, the number of people the average person could have in her social group was a hundred and fifty. Anything beyond that would be too complicated to handle at optimal processing levels. For the last twenty-two years, Dunbar has been “unpacking and exploring” what that number actually means—and whether our ever-expanding social networks have done anything to change it.

48 Psychological Facts About Yourself - Business Insider

Humans, Dunbar found, are capable of maintaining significantly more social ties than the size of our brains alone could explain. He proved that each human is surprisingly consistent in the number of social ties we can maintain: About five with intimate friends, 50 with good friends, 150 with friends and 1,500 with people we could recognize by name. That discovery came to be known as "Dunbar's number."

It’s a new day in the neighbourhood all across the Western world

Histories of humanevolution rely on stones and bones because that’s all that remains of ourancestors. That works well for anatomy but not so well for culture orconsciousness. British evolutionary psychologist Dunbar (, 2010,etc.), former director of the Institute of Cognitive and EvolutionaryAnthropology at Oxford, attacks the big questions: “What is it to be human (asopposed to being an ape)? And how did we come to be that way?” He offers aseries of lucid but definitely not dumbed-down answers. During the 1990s,scientists developed two approaches that did not require artifacts. The firstis the social brain hypothesis, which argues that intelligence evolved not tosolve ecological problems but to thrive in social groups. Studies show thatprimate brain size is proportional to the complexity of the species’ socialinteractions. Dunbar concludes that humans best maintain stable socialrelations with 150 others, a figure known as Dunbar’s number (modestly notnamed by the author). The second is the time budget model. Primates fill a24-hour day with travel, feeding, socialization, and rest. Changing one affectsthe others. Thus, the huge brain requires a great increase in energy intake. How did we accomplish thiswithout squeezing other activities? Some answers: eating meat, inventingcooking, saving energy by shrinking our gut, and traveling faster with ourlonger legs. Dunbar delivers impressive accounts of brain scans, genetics,sociological research, and animal and human psychological studies but no talesof intrepid anthropologists suffering in the desert.

Inbreeding & the downfall of the Spanish Hapsburgs - …

The study is one of several that have linked specific brain regions to an active social life. In research published last year, scientists found that some brain regions that process social signals, facial expressions and names and faces are larger in . Research has also shown that monkeys that live in larger groups .

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