Researchers found that those who scored higher on the psychopathy test experienced less activation in the amygdala, ventromedial prefrontal cortex, lateral orbitofrontal cortex, and periaqueductal gray brain regions, compared with those who scored lower on the test. Those who scored higher on the psychopathy test had more activation of the striatum and insula brain regions -- the insula brain region is known to play a role in emotion, researchers noted.
"This is the first time that neural processes associated with empathic processing have been directly examined in individuals with psychopathy, especially in response to the perception of other people in pain or distress," study researcher Jean Decety, a professor of psychiatry and psychology at the University of Chicago, said in a statement.
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