Real-Life Dry-Contact Ear-EEG

@article{Kappel2018RealLifeDE,
  title={Real-Life Dry-Contact Ear-EEG},
  author={Simon Lind Kappel and Preben Kidmose},
  journal={2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)},
  year={2018},
  pages={5470-5474}
}
  • S. L. Kappel, P. Kidmose
  • Published 1 July 2018
  • Computer Science, Medicine
  • 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Our brain state is affected by and adapted to our surroundings. [...] Key Method Ear-EEG is a method where EEG signals are recorded from electrodes placed on an earpiece inserted into the ear. The compact and discreet nature of an ear-EEG device makes it suitable for long-term real-life recordings. In this study, 6 subjects were recorded with conventional scalp EEG and ear-EEG. All recordings were performed with the same instrumentation and paradigms in both a lab setting and a real-life setting. The ear-EEG…Expand
Development and Characterization of Ear-EEG for Real-Life Brain-Monitoring
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The Ph.D. project showed that ear-EEG measurements can be performed in real-life, with dry-contact electrodes, and the brain processes studied, were established with comparable clarity on recordings from temporal lobe scalp and ear electrodes.
Generic Dry-Contact Ear-EEG
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A new generic earpiece design with larger internal ear electrode distances is introduced, resulting in an increased spatial coverage compared to previousGeneric dry-contact ear-EEG designs, which attained statistically significant ASSRs with ear-Fpz, within-ear and cross-ear electrode configurations.
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The potential of estimating absolute eye-gaze using EarEOG and motion sensors around the ear is demonstrated and a model was developed for the relativeEyeEOG estimation, taking saccades, fixations, head movement and drift from the electrode-skin half-cell into account.
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References

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Development and Characterization of Ear-EEG for Real-Life Brain-Monitoring
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The Ph.D. project showed that ear-EEG measurements can be performed in real-life, with dry-contact electrodes, and the brain processes studied, were established with comparable clarity on recordings from temporal lobe scalp and ear electrodes.
Dry-Contact Electrode Ear-EEG
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The study demonstrated that dry-contact electrode ear-EEG is a feasible technology for EEG recording, and represents an important technological advancement of the method in terms of user-friendliness, because it eliminates the need for gel in the electrode-skin interface.
EEG Recorded from the Ear: Characterizing the Ear-EEG Method
TLDR
Ear-EEG yields similar performance as conventional EEG for spectrogram-based analysis, similar timing of ERP components, and equal signal strength for sources close to the ear, and the auditory mismatch response was difficult to monitor with the ear- EEG.
Physiological artifacts in scalp EEG and ear-EEG
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Ear-EEG was more prone to jaw related artifacts and less prone to eye-blinking artifacts compared to state-of-the-art scalp based systems, and spontaneous activity, in terms of alpha band oscillations, could be recorded from the ear- EEG platform.
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We have developed a toolbox and graphic user interface, EEGLAB, running under the crossplatform MATLAB environment (The Mathworks, Inc.) for processing collections of single-trial and/or averaged EEG
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