Pessimism is hazardous to health, a study says.
Negative expectations of treatment results can lead to an increase in illness. Stimulation of the insular cortex of the brain by fear can seriously affect the heart. Pessimism is hazardous to health, a study says. Cultural anthropologist and epidemiologist Dr. Robert A. Hahn of the Federal Centers for Disease Control and Prevention presented this research at the American Health Foundation conference in New York City November 29. Not yet published.