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Flex-printed forehead EEG sensors (fEEGrid) for long-term EEG acquisition
Sarah Blum1, Reiner Emkes, Falk Minow
1Department of Psychology, Carl von Ossietzky University of Oldenburg, Germany. Author to whom any correspondence should be addressed.
Journal of Neural Engineering
|May 8, 2020
Summary
The fEEGrid forehead electrode array provides convenient, long-term electroencephalography (EEG) recordings. It reliably captures high-quality EEG signals suitable for brain-computer interfaces, even after 8 hours of comfortable wear.
Area of Science:
- Neuroscience
- Biomedical Engineering
Background:
- Long-term electroencephalography (EEG) monitoring is crucial for various neurological studies and applications.
- Traditional EEG setups can be cumbersome and may not be suitable for extended wear.
- Developing comfortable and reliable long-term EEG recording solutions is an ongoing challenge.
Purpose of the Study:
- To introduce and evaluate the fEEGrid, a novel electrode array for convenient, long-term EEG signal acquisition.
- To assess the reliability and signal quality of the fEEGrid over an 8-hour recording period.
- To determine the suitability of fEEGrid for online brain-computer interface (BCI) applications.
Main Methods:
- Twenty healthy participants underwent two EEG recording sessions within the same day, separated by 8 hours.
- The fEEGrid was worn by participants, with concurrent traditional cap EEG recordings taken during the later session.
- Standard EEG paradigms, including auditory and tactile oddball tasks, were performed to assess signal capture.
Main Results:
- The fEEGrid successfully captured reliable event-related potentials (ERPs).
- Single-trial analysis demonstrated above-chance classification for auditory and tactile oddball paradigms.
- EEG signal quality remained high, with impedances improving over the 8-hour recording period.
- All participants reported the fEEGrid was comfortable and pain-free even after prolonged wear.
Conclusions:
- The fEEGrid enables high-quality, reliable long-term EEG recordings.
- The device demonstrates suitability for online brain-computer interface applications.
- The fEEGrid offers a comfortable and effective solution for extended EEG monitoring.
