Disgust over an unfair or immoral social situation is hard-wired into the human body as strongly as the reaction to a foul taste, according to research published in the journal Science.
By studying the electrical activity of a muscle in the upper lip in both physically and morally offensive situations, scientists determined that disgust is equally strong in both cases.
"People use the term disgust in terms of morally offensive situations," said Adam Anderson, a professor of neuroscience at the University of Toronto and a co-author on the study. "Our study looked at whether this reaction was genuine disgust or just a metaphor."
For both sexes the most active region was the parietal lobe that deals with visual perception, spatial orientation and information processing, but it was focused on the right side of the brain in men while both sides participated in women.
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