Neural correlates of feigned memory impairment are distinguishable from answering randomly and answering incorrectly: An fMRI and Behaviral Study
Malingering is a complex cognitive activity. A number of researches have explored the utilization and efficiency of functional magnetic resonance imaging (fMRI) in malingering detection. Previous fMRI studies have identified activation in the prefrontal-parietal-sub-cortical circuit during feigned memory impairment when comparing with truthful telling. Here, we report an fMRI study that addressed an important but yet unanswered question: Is the neural activity associated with intentional feigned memory impairment and with other conditions (including answering randomly and answering incorrectly) differentiable? In this study, 12 healthy subjects underwent block-designed fMRI while they performed digit task of forced-choice format involving simulated feigned memory impairment and other conditions (including answering correctly, answering incorrectly, and answering randomly). The findings of this study clearly indicated that the brain activity associated with feigned memory impairment was different from the activity associated with other conditions. For some areas, including the right parietal, occipital, sub-cortical, and left prefrontal regions, brain activity was significantly greater in the feigned memory impairment condition, relative to other conditions. In contrast, for the left superior temporal pole, brain activity was significantly greater in ”answering incorrectly” condition than in the feigned memory impairment condition. These findings indicate that fMRI can detect the difference in brain activity between simulated feigned memory impairment and other conditions in healthy subjects.
feigned memory impairment malingering functional magnetic resonance imaging cognitive processes
Chun-Yu Liang Li Xue Hu Zhao
Mental Health Center,Shantou University Medical College,Shantou 515063,China The Laboratory of Forensic Psychiatry and Psychology,Department of Forensic Medicine,Zhongshan Medic
国内会议
上海
英文
42-50
2011-10-13（万方平台首次上网日期，不代表论文的发表时间）