Abstract
We solve problems by applying previously learned rules. The dorsolateral prefrontal cortex (DLPFC) plays a pivotal role in automating this process of rule induction. Despite its usual efficiency, this process fails when we encounter new problems in which past experience leads to a mental rut. Learned rules could therefore act as constraints which need to be removed in order to change the problem representation for producing the solution. We investigated the possibility of suppressing the DLPFC by transcranial direct current stimulation (tDCS) to facilitate such representational change. Participants solved matchstick arithmetic problems before and after receiving cathodal, anodal or sham tDCS to the left DLPFC. Participants who received cathodal tDCS were more likely to solve the problems that require the maximal relaxation of previously learned constraints than the participants who received anodal or sham tDCS. We conclude that cathodal tDCS over the left DLPFC might facilitate the relaxation of learned constraints, leading to a successful representational change.
| Original language | English |
|---|---|
| Article number | 2916 |
| Journal | Scientific Reports |
| Volume | 7 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Dec 2017 |
Bibliographical note
Funding Information:We would like to thank Nicholas Thompson for his help in setting up the experiment and initial data collection and to Prof. Anoush Margaryan for proofreading the paper. The research was supported by the CREAM project funded by the European Commission under the Grant Agreement No. 612022. This publication reflects only the authors' views, and the European Commission cannot be held responsible for any use which may be made of the information contained therein.
Publisher Copyright:
© 2017 The Author(s).