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Effective connectivity predicts cognitive empathy in cocaine addiction: a spectral dynamic causal modeling study

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Abstract

Social cognition plays a crucial role in the development and treatment of cocaine dependence. However, studies investigating social cognition, such as empathy and its underlying neural basis, are lacking. To explore the neural interactions among reward and memory circuits, we applied effective connectivity analysis on resting-state fMRI data collected from cocaine-dependent subjects. The relationship between effective connectivity within these two important circuits and empathy ability - evaluated with the Interpersonal Reactivity Index (IRI) - was assessed by machine learning algorithm using multivariate regression analysis. In accordance with the neurocircuitry disruptions of cocaine addiction, the results showed that cocaine-dependent subjects relative to healthy controls had altered resting state effective connectivity between parts of the memory and reward systems. Furthermore, effective connectivity between the memory and reward system could predict the fantasy empathy (FE) subscale scores in cocaine dependence. Overall, our findings provide further evidence for the neural substrates of social cognition in cocaine-dependent patients. These new insights could be useful for the development of new treatment programs for this substance dependency disorder.

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Notes

  1. To determine whether effective connectivity within the reward and memory systems could predict FE scores in healthy subjects, another group of age, sex and education level matched 24 healthy volunteers from the enhanced Nathan Kline Institute-Rockland Sample (NKI-RS) (Nooner et al. 2012) were used for multivariate regression analysis (see supporting material). The analysis result indicates that FE scores and other subscales cannot be predicted by effective connectivity of the memory and reward circuits in healthy controls group (NKI-RS), supporting that dysfunction of these two circuits might be associated with empathic deficits in cocaine dependence.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant No. 61876156, 31900764), the Fundamental Research Funds for the Central Universities (Grant No. SWU116074), the Ghent University Multidisciplinary Research Partnership “The integrative neuroscience of behavioral control”, and a BOF16/GOA/017 grant for a Concerted Research Action of Ghent University.

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Correspondence to Guo-Rong Wu.

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Wei, L., Wu, GR., Bi, M. et al. Effective connectivity predicts cognitive empathy in cocaine addiction: a spectral dynamic causal modeling study. Brain Imaging and Behavior 15, 1553–1561 (2021). https://doi.org/10.1007/s11682-020-00354-y

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  • DOI: https://doi.org/10.1007/s11682-020-00354-y

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