3D Printed Dry EEG Electrodes.

Area of Science:

• Biomedical Engineering
• Neuroscience
• Materials Science

Background:

• Electroencephalography (EEG) is crucial for monitoring brain activity non-invasively.
• Wearable EEG devices are gaining traction for diverse applications, including epilepsy diagnosis, stroke rehabilitation, and Brain-Computer Interfaces (BCI).
• Current EEG systems often rely on wet electrodes with conductive gel, posing challenges like discomfort, skin irritation, and limited long-term stability.

Purpose of the Study:

• To present a novel methodology for designing and manufacturing dry EEG electrodes.
• To address the limitations of traditional wet electrodes by developing a gel-free alternative.
• To enable cost-effective, customizable EEG electrode production for broader accessibility.

Main Methods:

• Developed a novel methodology for designing and manufacturing dry EEG electrodes.
• Utilized low-cost desktop 3D printers and off-the-shelf components for electrode fabrication.
• Compared the performance of the novel 3D-printed dry electrodes against standard wet electrodes.

Main Results:

• Successfully manufactured novel dry EEG electrodes using desktop 3D printing for the first time.
• The 3D-printed dry electrodes demonstrated performance suitable for Brain-Computer Interface (BCI) applications.
• Despite a higher noise floor compared to wet electrodes, the proposed dry electrodes maintain usability for BCI.

Conclusions:

• 3D-printed dry electrodes offer a viable, low-cost, and customizable alternative to traditional wet electrodes for EEG.
• This fabrication method facilitates the development of wearable EEG systems for out-of-the-lab applications.
• The developed dry electrodes show promise for advancing Brain-Computer Interface technology.