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Entropy analysis of the EEG background activity in Alzheimer's disease patients

Open access
Abásolo, D, Hornero, R, Espino, P, Álvarez, D, Poza, J·2006·Physiological Measurement

Abstract

Alzheimer's disease (AD) is the most common neurodegenerative disorder. Although a definite diagnosis is only possible by necropsy, a differential diagnosis with other types of dementia and with major depression should be attempted. The aim of this study was to analyse the electroencephalogram (EEG) background activity of AD patients to test the hypothesis that the regularity of the AD patients' EEG is higher than that of age-matched controls. We recorded the EEG from 19 scalp electrodes in 11 AD patients and 11 age-matched controls. Two different methods were used to estimate the regularity of the EEG background activity: spectral entropy (SpecEn) and sample entropy (SampEn). We did not find significant differences between AD patients and control subjects' EEGs with SpecEn. On the other hand, AD patients had significantly lower SampEn values than control subjects (p < 0.01) at electrodes P3, P4, O1 and O2. Our results show an increase of EEG regularity in AD patients. These findings suggest that nonlinear analysis of the EEG with SampEn could yield essential information and may contribute to increasing the insight into brain dysfunction in AD in ways which are not possible with more classical and conventional statistical methods.

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Metadata

Authors
Abásolo, D., Hornero, R., Espino, P., Álvarez, D., & Poza, J.
Venue
Physiological Measurement
Published
2006-01-13
Volume
27
Issue
3
Pages
241-253
ISSN
  • 0967-3334 (ISSN-L)
  • 1361-6579
OpenAlex
W2065919594
Cited by
347
References
2
FWCI
6.30
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Entropy analysis of the EEG background activity in Alzheimer's disease patients. https://app.cochat.ai/papers/10.1088/0967-3334/27/3/003
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Abásolo, D., Hornero, R., Espino, P., Álvarez, D., & Poza, J. (2006). Entropy analysis of the EEG background activity in Alzheimer's disease patients. Physiological Measurement. https://doi.org/10.1088/0967-3334/27/3/003

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