The roots of pessimism have finally been cracked by a group of scientists who were reading about mental health of patients with neuropsychiatric disorders. And this could help in new treatment options for the people who are pessimists. Neuropsychiatric disorders like anxiety and depression are related to nervous system. And researchers at the Massachusetts Institute of Technology have pinpointed the region of the brain that has the ability to generate pessimistic mood in a person. In the tests conducted on animals it showed that when this part of the brain the caudate nucleus is stimulated it induces more negative decision-making thoughts.