4.5 Article

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

期刊

JOURNAL OF SLEEP RESEARCH
卷 31, 期 6, 页码 -

出版社

WILEY
DOI: 10.1111/jsr.13555

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auditory stimulation; closed-loop stimulation; electroencephalography; in-ear sensor; scalp; sleep

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This study aimed to investigate the potential usability of in-the-ear electroencephalography for implementing auditory closed-loop stimulation during sleep. The findings suggest that in-ear activity provides enough information to automatically detect sleep slow oscillations in real-time, and successful enhancement of scalp slow oscillations was achieved using in-ear signals.
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.

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