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Related Experiment Video

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Recording Brain Activity with Ear-Electroencephalography
09:58

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Generic Dry-Contact Ear-EEG.

A R Bertelsen, H Bladt, C B Christensen

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |January 18, 2020
    PubMed
    Summary
    This summary is machine-generated.

    A new generic dry-contact ear-electroencephalography (ear-EEG) earpiece shows promise for discreet recordings. While achieving significant auditory steady-state responses (ASSRs), its signal quality was lower than the cEEGrid. Sleeping position did not impact ear-EEG performance.

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    Area of Science:

    • Biomedical Engineering
    • Neuroscience
    • Signal Processing

    Background:

    • Dry-contact ear-electroencephalography (ear-EEG) offers a discreet and user-friendly method for electroencephalography (EEG) recordings in real-world environments.
    • Previous ear-EEG designs had limitations in spatial coverage.

    Purpose of the Study:

    • To introduce and evaluate a novel generic earpiece design for ear-EEG with enhanced spatial coverage.
    • To assess the signal quality of different electrode configurations (ear-Fpz, within-ear, cross-ear) using auditory steady-state responses (ASSRs).
    • To compare the performance of the new earpiece against a dry-contact cEEGrid and investigate the effect of sleeping position.

    Main Methods:

    • Development of a new generic earpiece with increased internal electrode distances.
    • Evaluation of signal quality using auditory steady-state responses (ASSRs) in ten subjects.
    • Comparison of ear-EEG configurations (ear-Fpz, within-ear, cross-ear) with a dry-contact cEEGrid.
    • Investigation of sleeping positions (back vs. side) during sleep setup recordings.

    Main Results:

    • The developed generic earpiece successfully attained statistically significant ASSRs across all tested electrode configurations.
    • The dry-contact cEEGrid demonstrated a significantly higher average ASSR signal-to-noise ratio (SNR) compared to the generic earpiece.
    • No significant difference in ear-EEG performance was observed between sleeping on the back versus the side.

    Conclusions:

    • The novel generic earpiece design is capable of capturing statistically significant ASSRs, indicating its potential for unobtrusive EEG monitoring.
    • Further improvements are needed to match the signal-to-noise ratio achieved by the cEEGrid.
    • Sleeping position does not appear to be a confounding factor for ear-EEG recordings in a sleep setting.