Psychosomatic medicine: Think yourself well | The Economist
Think yourself well
You can. But it helps to think well of yourself in the first place
Dec 8th 2012 | from the print edition
THE link between mind and body is terrain into which many medical researchers, fearing ridicule, dare not tread. But perhaps more should do so. For centuries, doctors have recognised the placebo effect, in which the illusion of treatment, such as pills without an active ingredient, produces real medical benefits. More recently, respectable research has demonstrated that those who frequently experience positive emotions live longer and healthier lives. They have fewer heart attacks, for example, and fewer colds too.
Why this happens, though, is only slowly becoming understood. What is needed is an experiment that points out specific and measurable ways in which such emotions alter an individual’s biology. And a study published in Psychological Science, by Barbara Fredrickson and Bethany Kok at the University of North Carolina at Chapel Hill, does precisely that.
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Dr Fredrickson and Dr Kok concentrated their attentions on the vagus nerve. This nerve (illustrated right, in an early anatomical drawing) starts in the brain and runs, via numerous branches, to several thoracic and abdominal organs including the heart. Among its jobs is to send signals telling that organ to slow down during moments of calm and safety.