ArticleNeuroimage. Reports2021
Regularity and randomness in ageing: Differences in resting-state EEG complexity measured by largest Lyapunov exponent.
Article in Neuroimage. Reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed.
- EEG-Based Engagement Monitoring in Cognitive Games.Sensors (Basel, Switzerland) · 2025Article
- Discriminative power of diverse nonlinear EEG dynamics across consciousness states during auditory stimulation in disorders of consciousness.Frontiers in human neuroscience · 2025Article
- EEG biomarkers in Alzheimer's and prodromal Alzheimer's: a comprehensive analysis of spectral and connectivity features.Alzheimer's research & therapy · 2024Article
- EEG spectral attractors identify a geometric core of brain dynamics.Patterns (New York, N.Y.) · 2024Article
- Sex differences of signal complexity at resting-state functional magnetic resonance imaging and their associations with the estrogen-signaling pathway in the brain.Cognitive neurodynamics · 2024Article
- Multi-Classifier Fusion Based on MI-SFFS for Cross-Subject Emotion Recognition.Entropy (Basel, Switzerland) · 2022Article
- Enhanced temporal complexity of EEG signals in older individuals with high cognitive functions.Frontiers in neuroscience · 2022Article
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Authors and funding
6 authors.
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Abstract
The loss of complexity in ageing hypothesis (LOCH) has found support from EEG studies, most of which adopted signal-domain complexity measures. The present study adopted the largest Lyapunov exponent (LLE) to measure complexity from a nonlinear dynamical systems perspective. A total of 144 participants were included and divided into young, young-old and old-old groups. Both sensor-space and source-space results showed significantly lower LLE for older than younger adults. The age-related differences were region-dependent, being most prominent in the frontal region, followed by bilateral temporal regions. The occipital region showed non-significant differences. Significant reduction of LLE in the posterior cingulate was also observed by virtue of the source-space analysis. We also evaluated the relationships between LLE and other complexity measures. The most intriguing result was the negative correlation between LLE and Lempel-Ziv complexity (LZC). The age-related decrease in LLE indicated a higher regularity in dynamics, while the higher LZC indicated a higher randomness in the signal domain. The new findings support the LOCH by demonstrating the simultaneous increase in regularity and randomness.
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