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Researchers shed new light on connection between brain and loneliness
Date:2/15/2009

e of the Beholder: Individual Differences in Perceived Social Isolation Predict Regional Brain Activation to Social Stimuli," published in the current issue of the Journal of Cognitive Neuroscience.

In the study, 23 female undergraduates were tested to determine their level of loneliness. While in an fMRI scanner, the subjects were shown unpleasant pictures and human conflict as well as pleasant things such as money and happy people.

The subjects who rated as lonely were least likely to have strong activity in their ventral striata when shown pictures of people enjoying themselves.

Although loneliness may be influence brain activity, the research also suggests that activity in the ventral striatum may prompt feelings of loneliness, Decety said. "The study raises the intriguing possibility that loneliness may result from reduced reward-related activity in the ventral striatum in response to social rewards."

In addition to differing responses in the ventral striatum, the subjects also recorded differing responses in parts of the brain that indicated loneliness played a role in how their brain operates.

Joining Decety and Cacioppo in writing the Journal of Cognitive Science paper were Catherine Norris, Assistant Professor of Psychology at Dartmouth College; George Monteleone, a graduate student at the University of Chicago; and Howard Nusbaum, Chair of Psychology at the University of Chicago.

Decety and Cacioppo discussed the new field of brain mechanism in a paper in the current issue of Perspectives on Psychological Science, "What Are the Brain Mechanisms on Which Psychological Processes are Based?" The new field extends the work of Charles Darwin, who "regarded the brain as a product of evolution and the science of psychology as concerned with these foundations," they wrote.

By studying brain mechanisms, researchers hope to gain new insights by examining mental activities surrounding consciousness, perception and thought t
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Contact: William Harms
w-harms@uchicago.edu
773-702-8356
University of Chicago
Source:Eurekalert

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