Deficient fear conditioning in psychopathy: a functional magnetic resonance imaging study.
BACKGROUND
Psychopaths belong to a larger group of persons with antisocial personality disorder and are characterized by an inability to have emotional involvement and by the repeated violation of the rights of others. It was hypothesized that this behavior might be the consequence of deficient fear conditioning.


OBJECTIVE
To study the cerebral, peripheral, and subjective correlates of fear conditioning in criminal psychopaths and healthy control subjects.


METHODS
An aversive differential pavlovian delay conditioning paradigm with slides of neutral faces serving as conditioned and painful pressure as unconditioned stimuli.


METHODS
The Department of Medical Psychology at the University of Tübingen, Tübingen, Germany.


METHODS
Ten male psychopaths as defined by the Hare Psychopathy Checklist-Revised and 10 age- and education-matched healthy male controls. The psychopaths were criminal offenders on bail and waiting for their trial or were on parole. The healthy controls were recruited from the community.


METHODS
Brain activation based on functional magnetic resonance imaging, electrodermal responses, emotional valence, arousal, and contingency ratings.


RESULTS
The healthy controls showed enhanced differential activation in the limbic-prefrontal circuit (amygdala, orbitofrontal cortex, insula, and anterior cingulate) during the acquisition of fear and successful verbal and autonomic conditioning. The psychopaths displayed no significant activity in this circuit and failed to show conditioned skin conductance and emotional valence ratings, although contingency and arousal ratings were normal.


CONCLUSIONS
This dissociation of emotional and cognitive processing may be the neural basis of the lack of anticipation of aversive events in criminal psychopaths.
Institute of Medical Psychology and Behavioral Neurobiology and Section of Experimental Resonance Imaging of the CNS, Department of Neuroradiology, University of Tübingen, Tübingen, Germany.
Niels
N
Birbaumer
Ralf
R
Veit
Martin
M
Lotze
Michael
M
Erb
Christiane
C
Hermann
Wolfgang
W
Grodd
Herta
H
Flor
D000328:Adult; D000987:Antisocial Personality Disorder / Q000175:diagnosis* / Q000503:physiopathology; D001143:Arousal / Q000502:physiology; D001362:Avoidance Learning / Q000502:physiology; D001921:Brain / Q000502:physiology*; D003214:Conditioning, Classical / Q000502:physiology*; D004644:Emotions / Q000502:physiology; D005149:Facial Expression; D005239:Fear / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology; D005712:Galvanic Skin Response / Q000502:physiology; D006185:Habituation, Psychophysiologic; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000706:statistics & numerical data*; D008297:Male; D009434:Neural Pathways / Q000502:physiology / Q000503:physiopathology; D010146:Pain / Q000503:physiopathology; D014796:Visual Perception / Q000502:physiology