Skip to main content
Log in

Dual-tDCS over the right prefrontal cortex does not modulate stop-signal task performance

  • Research Article
  • Published:
Experimental Brain Research Aims and scope Submit manuscript

Abstract

Stopping an already initiated action is crucial for human everyday behavior and empirical evidence points toward the prefrontal cortex playing a key role in response inhibition. Two regions that have been consistently implicated in response inhibition are the right inferior frontal gyrus (IFG) and the more superior region of the dorsolateral prefrontal cortex (DLPFC). The present study targets both regions with non-invasive brain stimulation to investigate their role in response inhibition. Thus dual-prefrontal transcranial direct current stimulation (tDCS) was applied to both IFG and DLPFC in a repeated measures design and compared to sham tDCS. Specifically, 9 cm2 electrodes were positioned over both IFG and DLPFC in all groups. The active stimulation groups received off-line, anodal or cathodal tDCS over the IFG and opposite polarity tDCS of the DLPFC, while the sham stimulation group received short stimulation at the start, middle and end of the supposed 20-min stimulation period. Before and after tDCS, subjects’ inhibition capabilities were probed using the stop-signal task (SST). In a final sample of N = 45, participants were randomly split into three groups and received three different stimulation protocols. Results indicated that dual-frontal tDCS did not influence performance as compared to sham stimulation. This null result was confirmed using Bayesian analysis. This result is discussed against the background of the limitations of the present study as well as the potential theoretical implications.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2

Similar content being viewed by others

Data availability

After acceptance to a journal, all data will be uploaded under the same title to PsychArchives (www.psycharchives.org) where the data can be accessed for free by anybody.

Notes

  1. It should be noted that the position of the electrode over the right IFG does not match some of the previous literature. However those studies utilized much larger electrodes and the area of stimulation includes the F8 position (e.g., Jacobson et al. 2011; Ditye et al. 2012; Stramaccia et al. 2015; Cai et al. 2016). Furthermore, based on studies that match EEG 10–20 positions to brain structures, the F8 position most closely correlates with the right IFG (Okamoto et al. 2004).

References

Download references

Acknowledgements

We thank Janelle Berscheid for proofreading of the manuscript.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Maximilian A. Friehs.

Ethics declarations

Conflict of interest

The authors have no conflicts of interests to disclose.

Additional information

Communicated by Winston D Byblow.

Publisher's Note

Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Appendix

Appendix

See Table 2.

Table 2 Side effects of the tDCS stimulation for all three conditions reported by the participants on a 0–100 scale as well as a comparison of between-group differences

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Friehs, M.A., Brauner, L. & Frings, C. Dual-tDCS over the right prefrontal cortex does not modulate stop-signal task performance. Exp Brain Res 239, 811–820 (2021). https://doi.org/10.1007/s00221-020-05995-5

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00221-020-05995-5

Keywords

Navigation