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Related Experiment Video

Updated: Sep 11, 2025

Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

Randomized, Triple-Blind, and Parallel-Controlled Trial of Transcranial Direct Current Stimulation for Cognitive Rehabilitation after Stroke

Published on: June 6, 2025

HD-tDCS improves conflict processing and general behavioral stability.

Ronghan Liu¹, Miao Wang¹, Qiang Liu¹

¹Institute of Brain and Psychological Sciences, Sichuan Normal University, No.5, Jing'an Road, Chengdu, 610066, China.

Scientific Reports

|August 17, 2025

Summary

High-definition transcranial direct current stimulation (HD-tDCS) improved executive control (EC) by enhancing behavioral stability and conflict processing. This neurostimulation technique shows promise for cognitive enhancement and understanding brain function.

Keywords:

Executive control HD-tDCS Left DLPFC Steady-state block design

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Area of Science:

Neuroscience
Cognitive Psychology
Neuromodulation

Background:

Transcranial Direct Current Stimulation (tDCS) is used to enhance executive control (EC).
The precise mechanisms and effects of tDCS on baseline and conflict processing are not fully understood.
Existing research on tDCS effects on EC yields inconclusive results.

Purpose of the Study:

To investigate the distinct effects of high-definition tDCS (HD-tDCS) on baseline and conflict processing.
To elucidate the dual mechanisms of tDCS in modulating cognitive functions.
To explore tDCS's potential for enhancing executive control (EC).

Main Methods:

Application of high-definition tDCS (HD-tDCS) targeting the left dorsolateral prefrontal cortex (DLPFC).
Comparison of active tDCS group with a sham stimulation group.
Measurement of reaction time variability, mean reaction time, and error rates under different conditions.

Main Results:

HD-tDCS significantly reduced reaction time variability in both baseline and conflict conditions.
Active tDCS led to decreased mean reaction time and error rates specifically in the conflict condition.
Findings indicate enhanced general behavioral stability and improved conflict processing.

Conclusions:

HD-tDCS significantly enhances executive control (EC), improving both behavioral stability and conflict processing.
The study elucidates dual mechanisms of tDCS: modulating baseline brain states and specific cognitive processes.
Results offer valuable insights into tDCS mechanisms for cognitive function enhancement.