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Related Experiment Video

Updated: Mar 1, 2026

Simultaneous EEG Monitoring During Transcranial Direct Current Stimulation
07:52

Simultaneous EEG Monitoring During Transcranial Direct Current Stimulation

Published on: June 17, 2013

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Surface EEG-Transcranial Direct Current Stimulation (tDCS) Closed-Loop System.

Jorge Leite1,2, Leon Morales-Quezada1, Sandra Carvalho1,2

  • 11 Spaulding Neuromodulation Center, Spaulding Rehabilitation Hospital, Harvard Medical School, Boston, MA, USA.

International Journal of Neural Systems
|June 8, 2017
PubMed
Summary
This summary is machine-generated.

This study demonstrates a novel EEG-triggered transcranial direct current stimulation (tDCS) system. The closed-loop system successfully adapted stimulation based on real-time brain activity, proving its feasibility.

Keywords:
EEG algorithmEEG-tDCS closed-loop systemcognitive taskproof-of-concept

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Related Experiment Videos

Last Updated: Mar 1, 2026

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Neurostimulation

Background:

  • Conventional transcranial direct current stimulation (tDCS) lacks personalized adjustments, leading to variable outcomes.
  • Individual brain activity levels can significantly influence the effects of tDCS.
  • There is a need for adaptive stimulation protocols that respond to ongoing neural states.

Purpose of the Study:

  • To assess the feasibility of an electroencephalography (EEG)-triggered tDCS system.
  • To develop and test a closed-loop system using online EEG frequency band analysis.
  • To establish a proof-of-concept for adaptive neurostimulation.

Main Methods:

  • A double-blind, sham-controlled crossover study involving six healthy volunteers.
  • Development of a tDCS trigger algorithm based on significant changes in relative beta and alpha EEG power.
  • Single sessions of 10-minute, 2mA cathodal or sham tDCS, triggered by the EEG system.

Main Results:

  • The EEG-tDCS closed-loop system successfully detected predefined EEG changes in all participants.
  • The system reliably triggered tDCS stimulation based on the algorithm's criteria.
  • This represents a successful proof-of-concept for real-time, EEG-guided tDCS.

Conclusions:

  • An EEG-triggered tDCS system is feasible for adaptive neurostimulation in humans.
  • This closed-loop approach offers potential for more effective and personalized tDCS interventions.
  • Further research into closed-loop systems could unlock new clinical applications for tDCS.