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High-definition transcranial direct current stimulation of the dorsal anterior cingulate cortex modulates decision-making and executive control

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Abstract

Previous neuroimaging evidence highlights the translational implications of targeting the dorsal anterior cingulate cortex (dACC), i.e. a key node of the networks underlying conflict monitoring and decision-making, in brain stimulation treatments with clinical or rehabilitative purposes. While the optimized modelling of “high-definition” current flows between multiple anode–cathode pairs might, in principle, allow to stimulate an otherwise challenging target, sensitive benchmark metrics of dACC neuromodulation are required to assess the effectiveness of this approach. On this basis, we aimed to assess the modulatory effect of anodal and cathodal high-definition tDCS (HD-tDCS) of the dACC on different facets of executive control and decision-making in healthy young individuals. A combined modelling/targeting procedure provided the optimal montage for the maximum intensity of dACC stimulation with six small “high-definition” electrodes delivering anodal, cathodal or sham HD-tDCS for 20 min in a within-subject design with three separate sessions. Following stimulation, participants performed Flanker and gambling tasks unveiling individual differences in executive control and both loss- and risk-aversion in decision-making, respectively. Compared to both anodal and sham conditions, cathodal dACC stimulation significantly affected task performance by increasing control over the Flanker conflict effect, and both loss and risk-aversion in decision-making. By confirming the feasibility and effectiveness of dACC stimulation with HD-tDCS, these findings highlight the implications of modelling and targeting procedures for neuromodulation in clinical research, whereby innovative protocols might serve as treatment addressing dysfunctional dACC activity, or combined with cognitive training, to enhance higher-order executive functioning in different neuropsychiatric conditions.

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Availability of data and material

The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request.

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The codes used to analyse the data are available from the corresponding author on reasonable request.

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Acknowledgements

This research was partially supported by the “Ricerca Corrente” funding scheme of the Italian Ministry of Health. The authors have no financial interests relating to the work described and declare no conflict of interest.

Funding

Partial financial support was received from the “Ricerca Corrente” funding scheme of the Italian Ministry of Health.

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Authors

Contributions

GM conceptualization, data curation, investigation, methodology, writing—original draft. SLP investigation, writing—review and editing; DT: investigation, writing—review and editing. NC: conceptualization, formal analysis, funding acquisition, methodology, writing—original draft.

Corresponding author

Correspondence to Nicola Canessa.

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The author(s) declare no competing interests.

Ethical approval

The experimental protocol was approved by ICS Maugeri Ethics Committee according to the latest version of the declaration of Helsinki and safety guidelines for tDCS application (Poreisz et al. 2007).

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Informed consent was obtained from all individual participants included in the study.

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Human research participants provided informed consent for publication of the data anonymously.

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Mattavelli, G., Lo Presti, S., Tornaghi, D. et al. High-definition transcranial direct current stimulation of the dorsal anterior cingulate cortex modulates decision-making and executive control. Brain Struct Funct 227, 1565–1576 (2022). https://doi.org/10.1007/s00429-022-02456-3

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  • DOI: https://doi.org/10.1007/s00429-022-02456-3

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