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“Although this link between obesity and social networks was expected, it was surprising how strong the peer effect is and how early in life it starts,” says lead author Thomas Valente, Ph.D., professor of preventive medicine at the Keck School of Medicine.
The study appears in the August issue of the Journal of Adolescent Health, available online July 20 [continue reading…]
Our latest Psychobabble looks at Preventing Depression in Adolecents. Written by Jennifer Gibson, Pharm.D. its reprinted with kind permission from BrainBlogger
 Jennifer Gibson, PharmD, is a practicing clinical pharmacist and freelance medical writer and editor with experience in researching and preparing scientific publications, developing public relations materials, creating educational resources and presentations, and editing technical manuscripts. Her clients include academic research institutions, international authors, pharmaceutical companies, professional organizations, and public advocacy groups.
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Ask middle-school students if they are popular or make friends easily, they likely will depend on social comparisons with their peers for an answer. Such reliance on the perceived opinions of others, or reflected self-appraisals, has long been assumed, but new evidence supporting this claim has now been found in the teen brain.
Using functional magnetic resonance imaging (fMRI), researchers looked at adolescent and young-adult brain activity related to both direct self-appraisals, such as “Do I think I’m smart?” and perceptions of others’ opinions — reflected self-appraisals: “Do I think my friend thinks I’m lonely?”
Hypothalamus, a node of the emotion circuit. (Credit: Image courtesy of NIH/National Institute of Mental Health)
During direct self-appraisals, researchers found that adolescents show more activity than adults in neural networks tied to self-perception (medial prefrontal and parietal cortices) and in areas linked to social cognition (dorsomedial prefrontal cortex, temporal-parietal junction and posterior superior temporal sulcus). The results, said lead author Jennifer H. Pfeifer, a psychology professor at the University of Oregon, suggest that adolescent self-perceptions depend heavily on others. [continue reading…]
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