Age-related changes in EEG signal using triple correlation values.
| Autor: | Watanabe Y; Brain Functions Laboratory, Inc., Tokyo, Japan., Shibata T; Department of Neurosurgery, Toyama University Hospital, Toyama, Japan.; Department of Neurosurgery, Toyama Nishi General Hospital, Toyama, Japan., Tanaka M; Brain Functions Laboratory, Inc., Tokyo, Japan., Ishii K; Tokyo Metropolitan Institute for Geriatrics and Gerontology, Tokyo, Japan., Higuchi Y; Department of Neuropsychiatry, University of Toyama Graduate School of Medicine and Pharmaceutical Sciences, Toyama, Japan.; Research Center for Idling Brain Science, University of Toyama, Toyama, Japan., Kobayashi Y; Brain Functions Laboratory, Inc., Tokyo, Japan., Kosugi Y; Brain Functions Laboratory, Inc., Tokyo, Japan. |
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| Jazyk: | angličtina |
| Zdroj: | Frontiers in human neuroscience [Front Hum Neurosci] 2024 Sep 25; Vol. 18, pp. 1438924. Date of Electronic Publication: 2024 Sep 25 (Print Publication: 2024). |
| DOI: | 10.3389/fnhum.2024.1438924 |
| Abstrakt: | The alpha rhythm in human electroencephalography (EEG) is known to decrease in frequency with age. Previous study has shown that elderly individuals with dementia exhibit higher S values (spatial variability) and SD values (temporal variability) in the triple correlation of the occipital region (P3, P4, Oz) compared to healthy elderly individuals. The objective of this research is to examine changes in S and SD values of the alpha band with aging in healthy individuals using triple correlation values from the frontal region. The subjects were 50 healthy elderly subjects (mean age 73.0 ± 5.1 years), 34 healthy younger subjects (mean age 28.1 ± 4.6 years), and 21 dementia patients (mean age 70.1 ± 9.1 years). The methodology involved recording EEG for 5 min during rest with closed eyes, and then calculating S and SD values of the alpha band (8-13 Hz) using three electrodes in the frontal region (F3, F4, Fpz). The findings indicated that the S values of young individuals were significantly higher than those of elderly individuals ( p < 0.01), whereas the SD values of young individuals tended to be lower than those of elderly individuals. The elevated S values in young individuals imply greater spatial variability akin to individuals with dementia, whereas the reduced SD values in young individuals suggest lower temporal variability unlike individuals with dementia. The discrepancy between the S value and SD value in healthy young individuals suggests that the normal cortical dipole in the frontal regions might be more abundant in them compared to healthy elderly individuals. Competing Interests: YW, MT, YoK and YuK were employed by Brain Functions Laboratory, Inc. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. (Copyright © 2024 Watanabe, Shibata, Tanaka, Ishii, Higuchi, Kobayashi and Kosugi.) |
| Databáze: | MEDLINE |
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