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April 2011



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Anxiety has overtaken depression to become the most commonly diagnosed psychological disorder in the United States, with social anxiety its most frequent manifestation. Part of the cause of extreme social anxiety is thought to be related to bad experiences – being laughed at in class, blushing in front of friends, choking on a first date – so that a person learns to fear social situations. But that’s unlikely to be the whole story. Social anxiety runs in families suggesting some people have an innate predisposition for the disorder. The authors of a new study believe they’ve identified, for the first time, a neural correlate of this vulnerability.


Wen Zhou and colleagues scanned the brains of nineteen women while they were exposed to the smell of two types of men’s sweat, a floral scent, and the human steroid (and putative pheromone) androstadienone. One of the male sweat types was sexual, the other was neutral, and they were collected from men’s armpits as they watched either a sexual film or an educational documentary. The women weren’t told what the different smells were or where they came from.


Human sweat is known to convey social signals. For example, it’s been shown that people can tell a person’s emotional state purely from the smell of their sweat. The key findings in this new study are that the two types of sweat, compared to the other odours, led to increased activation in the orbitofrontal cortex (OFC) of the women’s brains, and that the level of this activation was related to the women’s amount of self-reported trait social anxiety. The women didn’t have any psychiatric diagnoses but the higher they scored on a measure of trait social anxiety (e.g. they said they felt uncomfortable in large groups), the less activation they exhibited in their OFC when exposed to the men’s sweat.


It’s important to emphasise that most of the women (nearly 90 per cent) didn’t realise the smells were from humans, and the smells had no effect on their in-the-moment mood or anxiety levels. Consistent with this, the different smells didn’t differentially affect the amygdala, a bilateral subcortical structure associated with fear processing. What the study appears to be showing is that subconscious social signals trigger increased OFC activity compared with nonsocial smells, and that the level of this activity is moderated by trait social anxiety.



Read in Full: http://bps-research-digest.blogspot.com/2011/03/sweaty-work-in-hunt-for-brain-basis-of.html?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+BpsResearchDigest+%28BPS+Research+Digest%29

Misreading Faces Tied To Child Social Anxiety

Article Date: 01 Apr 2011 – 3:00 PDT

Children suffering from extreme social anxiety are trapped in a nightmare of misinterpreted facial expressions: They confuse angry faces with sad ones, a new study shows.

“If you misread facial expressions, you’re in social trouble, no matter what other social skills you have,” says Emory psychologist Steve Nowicki, a clinical researcher who developed the tests used in the study. “It can make life very difficult, because other people’s faces are like a prism through which we look at the world.”

It’s easy to assume that a socially anxious child would be especially sensitive to anger. “It turns out that they never learn to pick up on anger and often make the error of seeing it as sadness,” Nowicki says. “It sets up a very problematic interaction.”

Some socially anxious children long to interact with others, he says, and may try to comfort someone they think is sad, but who is actually angry. “They want to help, because they’re good kids,” Nowicki says. “I’ve seen these kids trying to make a friend, and keep trying, but they keep getting rebuffed and are never aware of the reason why.”

The study was co-authored by Amy Walker, a former undergraduate student at Emory, now at Yeshiva University, and will be published in the Journal of Genetic Psychology.

Read in Full: http://www.medicalnewstoday.com/articles/220974.php

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