Logo do repositório
 
Publicação

EEG low conventional bands non‐linear machine learning‐based analysis for classifying MCI and sleep quality as a function of brain complexity

2025-12-01Artigo de investigação Acesso aberto
Ver registo simples
dc.contributor.authorPenalba‐Sánchez, Lucía
dc.contributor.authorRibeiro, Pedro Baptista
dc.contributor.authorCrook‐Rumsey, Mark
dc.contributor.authorSumich, Alexander
dc.contributor.authorHoward, Christina
dc.contributor.authorSanei, Saeid
dc.contributor.authorZandbagleh, Ahmad
dc.contributor.authorAzami, Hamed
dc.contributor.authorDüzel, Emrah
dc.contributor.authorHämmerer, Dorothea
dc.contributor.authorRodrigues, Pedro Miguel
dc.date.accessioned2026-01-12T10:14:21Z
dc.date.available2026-01-12T10:14:21Z
dc.date.issued2025-12-01
dc.description.abstractBACKGROUND: Good sleep quality is essential for both physiological and mental health. It helps in clearing TAU and beta-amyloid aggregates and consolidating memory, key processes in delaying dementia. Poor sleep is linked to reduced cognitive flexibility in daily life, likely due to decreased brain complexity, reflecting a reduced range of adaptive spatiotemporal brain dynamics. This study introduces a novel approach using non-linear EEG analysis focused on low conventional bands to classify sleep quality in individuals with mild cognitive impairment (MCI), based on brain complexity. METHOD: Resting-state EEG was collected from 22 participants with MCI aged 60+, grouped by sleep quality (Pittsburgh Sleep Quality Index): 11 MCI with good sleep, and 11 MCI with poor sleep (Table 1). EEG data (128 channels, 5-minute recordings) were normalized and decomposed using the Discrete Wavelet Transform to reach delta (1-4 Hz) and theta (4-8 Hz) bands. Ten non-linear complexity features, namely approximate entropy, correlation dimension, detrended fluctuation analysis, energy, Higuchi fractal dimension, Hurst exponent, Katz fractal dimension, Boltzmann Gibbs entropy, Lyapunov exponent and Shannon entropy, were extracted from 5 second segments. Statistical measures (mean, standard deviation, 95th percentile, variance, median, kurtosis) were computed from these time-distribution features. These statistics were then used for training and testing a set of classic machine learning classifiers, employing leave-one-out cross-validation (Figure 2). RESULTS: Brain complexity successfully classified sleep quality in MCI, achieving an accuracy and area under the curve (AUC) of 1 in channel D13 (delta subband) using Quadratic Discriminant Analysis (QDA), and an accuracy of 0.94 and an AUC of 0.95 in channel B17 (theta subband) using the Extra Trees Classifier (ETC) (Figure 3). CONCLUSION: Specific machine learning classifiers distinguish excellently sleep quality in MCI using spatiotemporal complexity features from slow EEG subbands. The most relevant channels for group discrimination were primarily located in bilateral temporal regions of the neocortex known to be among the first affected in amnestic MCI, as previously shown in neuroimaging studies. Future longitudinal studies could investigate whether changes in brain complexity within these slow-frequency temporal regions, influenced by sleep quality, are associated with an earlier or faster onset of dementia.eng
dc.identifier.citationPenalba?Sánchez, L., Ribeiro, P. B., Crook?Rumsey, M., & Sumich, A. et al. (2025). EEG low conventional bands non?linear machine learning?based analysis for classifying MCI and sleep quality as a function of brain complexity. Alzheimer's and Dementia, 21(S7), 1-3. Article e108401. https://doi.org/10.1002/alz70861_108401
dc.identifier.doi10.1002/alz70861_108401
dc.identifier.eid105025736457
dc.identifier.issn1552-5260
dc.identifier.otherc2b8166c-a190-4bc7-8090-7d2fa7de7ef2
dc.identifier.pmcPMC12725889
dc.identifier.pmid41434901
dc.identifier.urihttp://hdl.handle.net/10400.14/56490
dc.language.isoeng
dc.peerreviewedyes
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleEEG low conventional bands non‐linear machine learning‐based analysis for classifying MCI and sleep quality as a function of brain complexityeng
dc.typeresearch article
dspace.entity.typePublication
oaire.citation.endPage3
oaire.citation.issueS7
oaire.citation.startPage1
oaire.citation.titleAlzheimer's and Dementia
oaire.citation.volume21
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85

Ficheiros

Principais
A mostrar 1 - 1 de 1
Miniatura
Nome:
136388734.pdf
Tamanho:
705.73 KB
Formato:
Adobe Portable Document Format
Ver/Abrir

Coleções

CBQF - Contribuições em Revistas Científicas / Contribution to Journals