EEG Signal Diversity Varies With Sleep Stage and Aspects of Dream Experience
Frontiers in Psychology April 23, 2021 Arnfinn Aamodt, André Sevenius Nilsen, Benjamin Thürer et al. 24 citations
Signal diversity in EEG recordings, measured by Lempel-Ziv complexity and other metrics, decreases with deeper non-REM sleep stages, consistent with theories linking consciousness to complex cortical dynamics. However, signal diversity did not significantly differ between dreaming and non-dreaming periods within the same sleep stage. A positive correlation was found between Lempel-Ziv complexity over the posterior cortex and the thought-perceptual quality of dream contents, suggesting that specific aspects of dream experience may relate to local cortical signal diversity.