British researchers have using MRI images revealed that criminal psychopaths with antisocial personality disorders have a different brain structure than most people.  


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 This emerges in an article on the Norwegian health website, Dagens Medisin. They write:

According to the results of the British researchers study, the psychopaths' brain consisted of significantly less gray matter in the anterior parts of the prefrontal cortex and in the temporal poles (the tip of the temporal lobe). 

These are areas in the brain that are important for understanding other people's feelings and are activated in connection with reflections on morality.

Injuries in these areas, according to the researchers, are linked to a lack of empathy, poor response in relation to fear and stress and a lack of feelings such as guilt and shame.