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Elmore Furth Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 03:34 PM
Original message
Study ties brain structure size to socializing
So possibly being a social animal is based on brain structures.



NEW YORK (AP) — Do you spend time with a lot of friends? That might mean a particular part of your brain is larger than usual.

It's the amygdala, which lies deep inside. Brain scans of 58 volunteers in a preliminary study indicated that the bigger the amygdala, the more friends and family the volunteers reported seeing regularly.

That makes sense because the amygdala is at the center of a brain network that's important for socializing, says Lisa Feldman Barrett, an author of the work published online Sunday by the journal Nature Neuroscience.

For example, the network helps us recognize whether somebody is a stranger or an acquaintance, and a friend or a foe, said Barrett, of Northeastern University in Boston.

But does having a bigger amygdala lead to more friends, or does socializing with a lot of friends create a bigger amygdala? The study can't sort that out. But Barrett said it might be a bit of both.




Study ties brain structure size to socializing
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Teaser Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 03:37 PM
Response to Original message
1. correlational studies are getting more and more worthless
how about some hypotheses, guys?

The whole "find a difference" shotgun science approach is really vexing.
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Elmore Furth Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 03:44 PM
Response to Reply #1
3. Hypotheses? Size matters.
Everything in ehtnobiology suggests that there are brain structures that subserve social behavior.

So you want hypotheses?

The amygdala is well known to be involved in threat behaviors.

There are reciprocity structures in the brain.

There are friend and foe recognition areas in the brain.

There are neotinization recognition areas in the brain for the care of children.

There are oxytocin receptors in the brain for social bonding.

SO WHAT ARE YOUR HYPOTHESES?

If you wish to hypothesize that we are just big amoebas that slosh around in the environment, I would like to differ in my opinion.
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Teaser Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 07:43 PM
Response to Reply #3
8. the straw man at the end was cute
My hypotheses concern particular neural network architectures for motor control, and the mathematical ramifications thereof.

A bit more detailed than "size matters".

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snagglepuss Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 09:10 PM
Response to Reply #3
9. It'd be interesting to know if people who have been exposed to years of
intense fears have bigger amygdalas. Although very interesting, it strikes me (someone with simply basic understanding about brain function) as curious that the part of the brain that handles fight or flight would be so profoundly affected by positive social relationships.
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provis99 Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 05:28 PM
Response to Reply #1
5. some studies are no better than data mining, these days.
I can't tell you how frustrated I am at "researchers" who think all they need to do is throw a bunch of variables into a stepwise regression algorithm, and come up with some slop indicating that correlation equals causation. No different than sunspotting, in my opinion.
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Igel Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 06:26 PM
Response to Reply #5
6. It's not.
And it is. It depends on the timing.

Mapping and characterizing sunspots is pretty useless. Now. Not even always, but I'll cede the point.

But if it's 1650 CE or even 1850 CE, maybe mapping and characterizing sunspots and their patterns is not so useless.

Let's say you're a Fabricius. It's 1611, January. You're writing your report of novel observations. Maybe they're not novel, but your lit search didn't turn anything up. If you produce a theory and then tailor the set of facts to support your theory, the argument is over theory and nobody can really improve on it. Yeah, your facts support heliocentrism, but the theory could go either way given your facts. One big fact, generalized over a small set of little facts, doesn't make a theory, and you don't have enough to produce one. Nonetheless, the observations are useful: They are new facts. Perhaps you realize that your facts subvert your working theory. The alternative to publication is to sit on your facts until you have a proven, workable theory.

Even if you don't have more facts, a theory or even a hypothesis, what you do have may attract attention and that will produce new facts; perhaps 30 people will have 30 theories because of your set of facts, and all 30 will be wrong, but facts, useful only when their packaging is discarded, are useful.

In new fields, or fields so complex that theories are little more than heuristic mechanisms, sometimes, "Gee, isn't that interesting?" is the best science, and any theory that accompanies it is likely to be trite--useful in the lab, not so useful in the grand scheme of things. In other fields (mine, for instance), you often read articles that introduce a new fact. The fact is important; the less an experienced researcher knows to do with it, the more important the fact. But often a less-experienced researcher will go into a long-winded and utterly obvious explanation of how it fits into a specific theory (as though that were especially meaningful if it fits into 10 theories), or introduce a minor yet obvious tweak to make the theory accommodate the fact (thus doing nothing but showing how powerful and expansive, and therefore useless, the theory is). Yet what's useful is 10 years later when all the facts pile up and somebody makes a set of them and says, "Hey--did anybody notice this pattern before?" A metafact. Then somebody takes 20 "metafacts" and says, "Maybe it all works like this. Hmm...maybe not. But if it does, then...". A lot of 20-year-old journals 200 pages long could profitably be reissued in 20-page supplements of just the facts. Except that since they thought theory was so important when you pull out the facts you have gaping holes in the datasets that you just *know* the experimenter had data for but which wasn't relevant to the all-important theory. To save two pages they left out the data that gave context to their important facts, yet took 20 to explicate what boiled down to refined crap. (And the more obvious it is now that the theory was bass-ackward the harder it is to wring the original data out of the researcher.)

Frustrating, that. Yeah, give me the working hypotheses and make sure you don't confuse them with actual understanding and Truth. But first, give me the facts as they appear, with context to keep them from spinning out of control.
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RandomThoughts Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 03:42 PM
Response to Original message
2. Interestingly, when I had social interactions limited.
I found that I could still form empathetic bonds with people that I only have a vague representation of. By all accounts they would be imaginary friends, since my knowledge of the people is in part a construct of my thought added with feelings from empathy.

When being around people was removed, it does not remove the ability to exercise, grow, or use that part of a person, since with the right perception there are many people I have great care for that only exist as a representation of how I see them from my perspective with only the knowledge of them from representation and empathy.

I can not be isolated :D
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mike_c Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 04:25 PM
Response to Original message
4. I must have a vanishingly small amygdala, LOL....
YOU KIDS GET THE HELL OFF MY LAWN, DAMMIT!
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Igel Donating Member (1000+ posts) Send PM | Profile | Ignore Sun Dec-26-10 06:27 PM
Response to Original message
7. Alzheimer's affects the amygdala.
I wonder if there's any correlation between sociability and Alzheimer's that this could help explain?

(I'm guessing their is. But I'm not going to Google it.)
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