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Why some people always focus on the negative – MIT Study

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The following study was written up by Anne Trafton of the MIT News office.

Many patients with neuropsychiatric disorders such as anxiety or depression experience negative moods that lead them to focus on the possible downside of a given situation more than the potential benefit.

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MIT neuroscientists have found that stimulating part of the striatum can induce feelings of pessimism. (Anatomography/Life Science Databases)

MIT neuroscientists have now pinpointed a brain region that can generate this type of pessimistic mood. In tests in animals, they showed that stimulating this region, known as the caudate nucleus, induced animals to make more negative decisions: They gave far more weight to the anticipated drawback of a situation than its benefit, compared to when the region was not stimulated. This pessimistic decision-making could continue through the day after the original stimulation. Continue reading

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