(Press-News.org) When individuals with psychopathy imagine others in pain, brain areas necessary for feeling empathy and concern for others fail to become active and be connected to other important regions involved in affective processing and decision-making, reports a study published in the open-access journal Frontiers in Human Neuroscience.
Psychopathy is a personality disorder characterized by a lack of empathy and remorse, shallow affect, glibness, manipulation and callousness. Previous research indicates that the rate of psychopathy in prisons is around 23%, greater than the average population which is around 1%.
To better understand the neurological basis of empathy dysfunction in psychopaths, neuroscientists used functional magnetic resonance imaging (fMRI) on the brains of 121 inmates of a medium-security prison in the USA.
Participants were shown visual scenarios illustrating physical pain, such as a finger caught between a door, or a toe caught under a heavy object. They were by turns invited to imagine that this accident happened to themselves, or somebody else. They were also shown control images that did not depict any painful situation, for example a hand on a doorknob.
Participants were assessed with the widely used PCL-R, a diagnostic tool to identify their degree of psychopathic tendencies. Based on this assessment, the participants were then divided in three groups of approximately 40 individuals each: highly, moderately, and weakly psychopathic.
When highly psychopathic participants imagined pain to themselves, they showed a typical neural response within the brain regions involved in empathy for pain, including the anterior insula, the anterior midcingulate cortex, somatosensory cortex, and the right amygdala. The increase in brain activity in these regions was unusually pronounced, suggesting that psychopathic people are sensitive to the thought of pain.
But when participants imagined pain to others, these regions failed to become active in high psychopaths. Moreover, psychopaths showed an increased response in the ventral striatum, an area known to be involved in pleasure, when imagining others in pain.
This atypical activation combined with a negative functional connectivity between the insula and the ventromedial prefrontal cortex may suggest that individuals with high scores on psychopathy actually enjoyed imagining pain inflicted on others and did not care for them. The ventromedial prefrontal cortex is a region that plays a critical role in empathetic decision-making, such as caring for the wellbeing of others.
Taken together, this atypical pattern of activation and effective connectivity associated with perspective taking manipulations may inform intervention programs in a domain where therapeutic pessimism is more the rule than the exception. Altered connectivity may constitute novel targets for intervention. Imagining oneself in pain or in distress may trigger a stronger affective reaction than imagining what another person would feel, and this could be used with some psychopaths in cognitive-behavior therapies as a kick-starting technique, write the authors.
INFORMATION:
Contacts
Prof Jean Decety
Department of Psychology and Department of Psychiatry and Behavioral Neuroscience
University of Chicago, USA
E-mail: decety@uchicago.edu
Gozde Zorlu
Press Manager, Frontiers
gozde.zorlu@frontiersin.org
Note to Editors
To request a copy of the embargoed paper, please contact Gozde Zorlu: gozde.zorlu@frontiersin.org
Please cite "Frontiers in Human Neuroscience" as the publication and include a link to the paper, which will become available on the following active URL: http://94.236.98.240/human_neuroscience/10.3389/fnhum.2013.00489/abstract
Article title: An fMRI study of affective perspective taking in individuals with psychopathy: imagining another in pain does not evoke empathy
Journal: Frontiers in Human Neuroscience
DOI: 10.3389/fnhum.2013.00489
List of authors: Jean Decety, Chenyi Chen, Carla Harenski and Kent A. Kiehl.
About Frontiers
Frontiers is a community driven open-access publisher and research networking platform. Launched and run by scientists since 2007, Frontiers empowers researchers to advance the way science is evaluated communicated, and shared in the digital era. Frontiers joined the Nature Publishing Group family in 2013.
The "Frontiers in" series of journals publish around 500 peer-reviewed articles every month, which receive 5 million monthly views and are supported by 30,000 editors and reviewers around the world. Frontiers has partnerships with international organizations such as the Max Planck Society and the International Union of Immunological Societies (IUIS). For more information, please visit: http://www.frontiersin.org
A neurological basis for the lack of empathy in psychopaths
2013-09-25
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