Related Experiment Video
Updated: Jul 31, 2025
10:08
The Evoked Potential Operant Conditioning System EPOCS: A Research Tool and an Emerging Therapy for Chronic Neuromuscular Disorders
Published on: August 25, 2022
3.0K
Towards optimizing single pulse electrical stimulation: High current intensity, short pulse width stimulation most
Mark A Hays1, Golnoosh Kamali2, Mohamad Z Koubeissi3
1Department of Biomedical Engineering, Johns Hopkins University, Baltimore, MD, USA.
Brain Stimulation
|May 4, 2023
Summary
Optimizing single pulse electrical stimulation (SPES) involves understanding how parameters like current intensity and pulse width affect cortico-cortical evoked potentials (CCEPs). High intensity, short pulse width SPES yields optimal CCEPs while minimizing charge.
Area of Science:
- Neuroscience
- Electrophysiology
- Brain Stimulation
Background:
- Single pulse electrical stimulation (SPES) is a common method for studying effective brain connectivity.
- Systematic exploration of SPES parameter effects on cortico-cortical evoked potentials (CCEPs) is lacking.
Purpose of the Study:
- To investigate the interactive effects of stimulation parameters on CCEPs.
- To analyze how pulse width, current intensity, and charge influence CCEP metrics.
Main Methods:
- SPES was performed on 11 patients undergoing intracranial EEG monitoring.
- Varied current intensity (1.5-7.5 mA) and pulse width across three charge levels (0.750-1.500 μC/phase).
- Analyzed CCEP amplitude, distribution, latency, morphology, and artifact amplitude.
Main Results:
- Higher charge or higher current intensity with shorter pulse width increased CCEP amplitude, spatial distribution, and waveform correlation, while decreasing latency.
- Interactions showed lowest charge/highest intensity yielded greater responses than highest charge/lowest intensity.
- Stimulus artifact increased with charge but was reduced by shorter pulse widths.
Conclusions:
- Current intensity and pulse width, alongside charge, significantly determine CCEP characteristics.
- Optimal SPES settings for robust and consistent CCEPs involve high current intensity and short pulse width, minimizing charge.
