Scientists have shown that there is a specific network of brain regions involved in mediating moral judgment. Based on research, “antisocial groups” such as psychopaths may know what is moral, but they may lack a feeling of what is moral.
Several researchers have additionally suggested that the brain areas involved in moral judgment overlap with what is called the “default mode network,” which is involved in our “baseline” state of being awake but at rest. Many research teams approach the morality issue by concentrating on different parts of the brain and different kinds of studies.
Similar research is also being conducted on those with autistic brains.
Link suggested by a Lovefraud reader.
How your brain makes moral judgments, from CNN.com