Auditory closed-loop stimulation on sleep slow oscillations using in-ear EEG sensors

Henao, David, Navarrete, Miguel, Juez, José Yesith, Dinh, Hugo, Gómez, Rodrigo, Valderrama, Mario and Le Van Quyen, Michel 2022. Auditory closed-loop stimulation on sleep slow oscillations using in-ear EEG sensors. Journal of Sleep Research 31 (6) , e13555. 10.1111/jsr.13555

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Abstract

Acoustic stimulation synchronized to slow oscillations in scalp electroencephalograms has been shown to enhance sleep features, which makes it promising in boosting cognitive functions as well as in the treatment of some sleep disturbances. Nevertheless, scalp electrode sensors are resource intensive and poorly tolerated by sleeping patients. The aim of this study was to investigate the potential usability of in-the-ear electroencephalography to implement auditory closed-loop stimulation during sleep. For this, we evaluated the agreement between slow oscillation recordings obtained through the in-ear sensor and those obtained simultaneously from standard scalp electrodes during naps of 13 healthy subjects. We found that in-ear activity provided enough information to automatically detect sleep slow oscillations in real-time. Based on this, we successfully enhanced scalp slow oscillations using auditory single-cycle closed-loop brain-state-dependent stimulation based on in-ear signals acquired in 11 further subjects. We conclude that in-ear sensors provide a feasible technology for the enhancement of sleep patterns, and could pave the way for new clinical applications in the near future.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Psychology Cardiff University Brain Research Imaging Centre (CUBRIC)
Publisher:	Wiley
ISSN:	0962-1105
Date of Acceptance:	17 January 2022
Last Modified:	07 Dec 2022 15:00
URI:	https://orca.cardiff.ac.uk/id/eprint/147745

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