News,
A recent study out of Dortmund, Germany has found that transcranial stimulation of a brain region in the prefrontal cortex can change the brain’s view of a perceived danger as safe.
In this study, researchers recorded brain activity in healthy individuals with an MRI machine, while they underwent a conditioning task. In the task, individuals would see images of a desk with either a blue or yellow table lamp, during which the researchers conditioned them with a mild electrical shock delivered to their fingers. After the conditioning day, participants were once more exposed to these images; however, a transcranial stimulation of the ventromedial prefrontal cortex (vmPFC) was applied to enhance extinction learning, which is the process by which a participant learns that a previously threatening stimulus is no longer a danger. Thereafter, on day 3, participants were tested for recall to observe whether the fear networks were active. Here, an interesting outcome was observed. Activity of the brain’s safety networks was increased, and participants had a lowered stress response as measured by skin conductance (SCR) during recall. The idea of SCR is that when an individual experiences arousal, the sweat glands secrete sweat, leading to an increase in electrical conductance due to moisture on the skin.
While these results are promising, the researchers note a limitation of the study: the reliance on SCR only and that additional indicators could benefit a future study.
The change in recall and not extinction indicates an effect on consolidation (a period when memories are strengthened after exposure) rather than a reduction in fear response during extinction. This indicated the role of the vmPFC. It is possible that this area is involved in fear control during recall, perhaps via amygdala inhibition. Furthermore, the researchers ask whether stimulation targeting consolidation (post extinction) could be even more effective.
This method could potentially be an effective intervention in anxiety-related disorders where exposure therapy is used. Specifically in patients where relapse is common, to enhance the effectiveness. This study highlights a possible future direction of treatment of mental disorders. The potential outcomes are exciting. However, one cannot help but wonder, are we heading towards mind hacking?
Could such methods go beyond therapeutic benefit and be used for enhancements in sports or everyday life?
Declaration of AI use: The author used Lumo AI for spelling and grammar-checking during the preparation of this article.
Reference
Chhabra, H., Ma, Y., Genç, E. et al. The physiological foundation of extinction improvement by tDCS over the ventromedial prefrontal cortex (vmPFC) in healthy humans: an fMRI study. Transl Psychiatry 16, 319 (2026). https://doi.org/10.1038/s41398-026-04190-4 Licensed under CC BY 4.0. Link: https://creativecommons.org/licenses/by/4.0/
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