Putting the “pseudo” back in pseudopsychopathy: assessing psychopathic traits in individuals with focal brain lesions

• Main Author: Reber, Justin
• Other Authors: Tranel, Daniel
• Format: Others
• Language: English
• Published: University of Iowa 2019
• Subjects: acquired sociopathy; frontal lobe syndromes; morality; neuropsychology; psychopathy; ventromedial prefrontal cortex; Psychology
• Online Access: https://ir.uiowa.edu/etd/6840; https://ir.uiowa.edu/cgi/viewcontent.cgi?article=8374&context=etd

Damage to the ventromedial prefrontal cortex (vmPFC) can lead to disturbances in personality, emotional dysregulation, impairments in social conduct, and difficulties in decision-making. Many researchers have likened the conduct of individuals with vmPFC lesions to that of criminal psychopaths, labeling the effects of vmPFC damage “pseudopsychopathy” or “acquired sociopathy.” However, although psychopathy—a condition marked by a distinct mosaic of antisocial personality traits and behaviors—has been studied and characterized as a psychological and behavioral disorder by many researchers, the overlap between acquired sociopathy and psychopathy remains ambiguous. This study assessed the severity of psychopathic personality traits in neurological patients with acquired damage to the vmPFC using both informant-report and self-report measures. On both informant-report and self-report measures, individuals with vmPFC damage showed no significant elevations across a wide range of psychopathic traits relative to demographically-matched neurologically healthy comparison participants and patients with damage outside of the vmPFC. The results showed only one trait, Fearlessness, that was significantly higher in patients with vmPFC lesions relative to the neurologically-healthy comparison group.