Case comparison of sleep features from ear-EEG and scalp-EEG

BackgroundWe investigate the potential usability of a novel in-the-ear electroencephalography recording device for sleep staging.MethodsIn one healthy subject we compare simultaneous earelectroencephalography to standard scalp EEG visually and using power spectrograms. Hypnograms independently derived from the records are compared.ResultsWe find that alpha activity, K complexes, sleep spindles and slow wave sleep can be visually distinguished using earelectroencephalography. Spectral peaks are shared between the two records. Hypnograms are 90.9% similar.ConclusionThe results indicate that ear-electroencephalography can be used for sleep staging.