Alpha band EEG coherence in healthy nonagenarians
ABSTRACT Electroencephalographic (EEG) coherence is a parameter that enables evaluation of cerebral connectivity. It may be related to the functional state of the brain. In the elderly, it may reflect the neuronal loss caused by aging. Objective To describe characteristics of coherence in nonagena...
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| Series: | Arquivos de Neuro-Psiquiatria |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2017000900609&lng=en&tlng=en |
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| _version_ | 1849468637593731072 |
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| author | Mario Silva Jorge Livia Spindola Joyce Haruyo Biancon Katata Renato Anghinah |
| author_facet | Mario Silva Jorge Livia Spindola Joyce Haruyo Biancon Katata Renato Anghinah |
| author_sort | Mario Silva Jorge |
| collection | DOAJ |
| description | ABSTRACT Electroencephalographic (EEG) coherence is a parameter that enables evaluation of cerebral connectivity. It may be related to the functional state of the brain. In the elderly, it may reflect the neuronal loss caused by aging. Objective To describe characteristics of coherence in nonagenarians. Methods We evaluated interhemispheric coherence for the alpha band in 42 cognitively normal individuals aged 90 to 101 years. Coherence values in the occipital electrode (O1O2), in the resting state with closed eyes, were calculated by means of spectral analysis using digital EEG EMSA 32 channels, 12 bits and a frequency of 200 Hz. Results The mean coherence value for the alpha band at O1O2 was 0.65 (SD 0.13). No significant differences were found between men and women. Conclusions The findings from this study did not show any decrease in interhemispheric coherence for the alpha band in cognitively normal nonagenarians. This may be useful as a standard value for this age group. |
| format | Article |
| id | doaj-art-fe08fcb0a4324b49af302933cc1d871e |
| institution | Kabale University |
| issn | 1678-4227 |
| language | English |
| publisher | Thieme Revinter Publicações |
| record_format | Article |
| series | Arquivos de Neuro-Psiquiatria |
| spelling | doaj-art-fe08fcb0a4324b49af302933cc1d871e2025-08-20T03:25:47ZengThieme Revinter PublicaçõesArquivos de Neuro-Psiquiatria1678-422775960961310.1590/0004-282x20170102S0004-282X2017000900609Alpha band EEG coherence in healthy nonagenariansMario Silva JorgeLivia SpindolaJoyce Haruyo Biancon KatataRenato AnghinahABSTRACT Electroencephalographic (EEG) coherence is a parameter that enables evaluation of cerebral connectivity. It may be related to the functional state of the brain. In the elderly, it may reflect the neuronal loss caused by aging. Objective To describe characteristics of coherence in nonagenarians. Methods We evaluated interhemispheric coherence for the alpha band in 42 cognitively normal individuals aged 90 to 101 years. Coherence values in the occipital electrode (O1O2), in the resting state with closed eyes, were calculated by means of spectral analysis using digital EEG EMSA 32 channels, 12 bits and a frequency of 200 Hz. Results The mean coherence value for the alpha band at O1O2 was 0.65 (SD 0.13). No significant differences were found between men and women. Conclusions The findings from this study did not show any decrease in interhemispheric coherence for the alpha band in cognitively normal nonagenarians. This may be useful as a standard value for this age group.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2017000900609&lng=en&tlng=eneletroencefalografiaidoso de 80 anos ou maissaúde do idosoenvelhecimento |
| spellingShingle | Mario Silva Jorge Livia Spindola Joyce Haruyo Biancon Katata Renato Anghinah Alpha band EEG coherence in healthy nonagenarians Arquivos de Neuro-Psiquiatria eletroencefalografia idoso de 80 anos ou mais saúde do idoso envelhecimento |
| title | Alpha band EEG coherence in healthy nonagenarians |
| title_full | Alpha band EEG coherence in healthy nonagenarians |
| title_fullStr | Alpha band EEG coherence in healthy nonagenarians |
| title_full_unstemmed | Alpha band EEG coherence in healthy nonagenarians |
| title_short | Alpha band EEG coherence in healthy nonagenarians |
| title_sort | alpha band eeg coherence in healthy nonagenarians |
| topic | eletroencefalografia idoso de 80 anos ou mais saúde do idoso envelhecimento |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X2017000900609&lng=en&tlng=en |
| work_keys_str_mv | AT mariosilvajorge alphabandeegcoherenceinhealthynonagenarians AT liviaspindola alphabandeegcoherenceinhealthynonagenarians AT joyceharuyobianconkatata alphabandeegcoherenceinhealthynonagenarians AT renatoanghinah alphabandeegcoherenceinhealthynonagenarians |