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Related Experiment Video

Updated: Nov 23, 2025

Transcranial Direct Current Stimulation tDCS for Memory Enhancement

Transcranial Direct Current Stimulation tDCS for Memory Enhancement

Published on: September 18, 2021

Enhancing creativity by altering the frontoparietal control network functioning using transcranial direct current

Adi Lifshitz-Ben-Basat¹, Nira Mashal^2,3

¹Department of Communication Disorders, Faculty of Health Sciences, Ariel University, Kiryat Hamada, 40700, Ariel, Israel. adilb@ariel.ac.il.

Experimental Brain Research

|January 3, 2021

Summary

Cathodal transcranial direct current stimulation (tDCS) over the left angular gyrus enhances novel metaphor generation. Anodal tDCS boosts conventional metaphors, suggesting targeted brain stimulation influences creative thinking.

Keywords:

Default_mode_network Frontoparietal control network Metaphore processing Neuromodulation Verbal-creativity tDCS

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Area of Science:

Neuroscience
Cognitive Psychology
Neuromodulation

Background:

The left angular gyrus (AG) is a key region in the frontotemporal network, crucial for creative thinking.
Verbal creativity, specifically novel metaphor generation, has been linked to the AG's function.

Purpose of the Study:

To investigate the causal effects of transcranial direct current stimulation (tDCS) over the left AG on metaphor generation.
To differentiate the impact of anodal versus cathodal tDCS on novel and conventional metaphor production.

Main Methods:

A randomized, double-blind, sham-controlled, crossover design was employed.
Participants underwent anodal, cathodal, and sham tDCS over the left AG during two distinct metaphor generation tasks.
The influence of motivation traits (fun-seeking) on creativity was assessed.

Main Results:

Cathodal tDCS significantly increased the generation of novel metaphors compared to sham stimulation.
Anodal tDCS led to a significant increase in the production of conventional metaphors.
Individual motivation traits influenced metaphor creativity in the sham condition but not after active tDCS.

Conclusions:

Cathodal tDCS over the left AG can enhance novel metaphor generation, likely by modulating the control network.
Anodal tDCS appears to facilitate more conventional or less divergent creative output.
This study provides insights into the neural underpinnings of creative cognition and the potential of tDCS for modulating creativity.