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Auditory closed-loop stimulation on sleep slow oscillations using in-ear EEG sensors
David Henao1, Miguel Navarrete1,2, José Yesith Juez1
1Department of Biomedical Engineering, Universidad de Los Andes, Bogotá D.C., Colombia.
Journal of Sleep Research
|February 6, 2022
Summary
In-ear electroencephalography successfully detected sleep slow oscillations, enabling real-time auditory stimulation to enhance sleep patterns. This technology offers a comfortable alternative to scalp electrodes for sleep improvement and potential clinical applications.
Area of Science:
- Neuroscience
- Sleep Science
- Biomedical Engineering
Background:
- Acoustic stimulation synchronized with scalp electroencephalography (EEG) enhances sleep and cognitive function.
- Scalp EEG sensors are cumbersome and poorly tolerated during sleep.
Purpose of the Study:
- To assess the feasibility of in-the-ear EEG for closed-loop auditory stimulation during sleep.
- To evaluate in-ear EEG's ability to detect sleep slow oscillations.
Main Methods:
- Compared in-ear EEG recordings with simultaneous scalp EEG recordings in 13 healthy subjects during naps.
- Implemented closed-loop auditory stimulation based on real-time in-ear EEG signals in 11 subjects.
Main Results:
- In-ear EEG activity effectively captured sleep slow oscillations for real-time detection.
- Auditory closed-loop stimulation based on in-ear signals successfully enhanced scalp-recorded slow oscillations.
Conclusions:
- In-ear EEG is a viable technology for monitoring sleep patterns.
- This approach offers a comfortable and effective method for sleep enhancement and may lead to new clinical applications.
