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Interictal brain activity changes in temporal lobe epilepsy: A quantitative electroencephalogram analysis.

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Title: Interictal brain activity changes in temporal lobe epilepsy: A quantitative electroencephalogram analysis.
Authors: Fonseca, Elena (AUTHOR), Quintana, Manuel (AUTHOR), Seijo‐Raposo, Iván (AUTHOR), Ortiz de Zárate, Zuriñe (AUTHOR), Abraira, Laura (AUTHOR), Santamarina, Estevo (AUTHOR), Álvarez‐Sabin, José (AUTHOR), Toledo, Manuel (AUTHOR)
Source: Acta Neurologica Scandinavica. Feb2022, Vol. 145 Issue 2, p239-248. 10p.
Subjects: Temporal lobe epilepsy, Epilepsy, Fast Fourier transforms, Temporal lobe, Quantitative research, Drug resistance, Brain-computer interfaces, Temporal lobectomy
Abstract: Objectives: To evaluate the usefulness of quantitative electroencephalography (qEEG) in the analysis of baseline activity in patients with temporal lobe epilepsy (TLE) and identify measures potentially associated with disease duration and drug resistance. Materials and Methods: Cross‐sectional study of adult patients with TLE and controls who underwent video‐EEG monitoring. Representative artifact‐free resting wakefulness baseline EEG segments were selected for quantitative analysis. The fast Fourier transform (FFT) approach was used for the power spectral analysis, with computation of FFT power ratios and alpha‐delta and alpha‐theta ratios for both hemispheres. The resulting measures were compared between TLE patients and controls and their values as predictors of epilepsy duration and drug resistance analyzed. Results: Thirty‐nine TLE patients and 23 controls were included. The TLE patients had a lower alpha‐delta ratio in the posterior quadrant ipsilateral to the epileptic focus and a lower alpha‐theta ratio in the ipsilateral anterior/posterior quadrants and temporal region. A younger age at onset and longer epilepsy duration correlated with a higher theta power ratio in the contralateral anterior and posterior quadrants and temporal region. No qEEG measures predicted drug resistance. Conclusions: Quantitative electroencephalography background activity may contribute to the diagnosis of TLE and provide useful information on disease duration. A lower alpha‐delta and alpha‐theta ratio may be reliable baseline qEEG measures for identifying patients with TLE. A higher contralateral theta power ratio may be indicative of longer epilepsy duration. [ABSTRACT FROM AUTHOR]
Copyright of Acta Neurologica Scandinavica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Label: Title
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  Data: Interictal brain activity changes in temporal lobe epilepsy: A quantitative electroencephalogram analysis.
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  Data: <searchLink fieldCode="AR" term="%22Fonseca%2C+Elena%22">Fonseca, Elena</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Quintana%2C+Manuel%22">Quintana, Manuel</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Seijo‐Raposo%2C+Iván%22">Seijo‐Raposo, Iván</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ortiz+de+Zárate%2C+Zuriñe%22">Ortiz de Zárate, Zuriñe</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Abraira%2C+Laura%22">Abraira, Laura</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Santamarina%2C+Estevo%22">Santamarina, Estevo</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Álvarez‐Sabin%2C+José%22">Álvarez‐Sabin, José</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Toledo%2C+Manuel%22">Toledo, Manuel</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Acta+Neurologica+Scandinavica%22">Acta Neurologica Scandinavica</searchLink>. Feb2022, Vol. 145 Issue 2, p239-248. 10p.
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  Data: <searchLink fieldCode="DE" term="%22Temporal+lobe+epilepsy%22">Temporal lobe epilepsy</searchLink><br /><searchLink fieldCode="DE" term="%22Epilepsy%22">Epilepsy</searchLink><br /><searchLink fieldCode="DE" term="%22Fast+Fourier+transforms%22">Fast Fourier transforms</searchLink><br /><searchLink fieldCode="DE" term="%22Temporal+lobe%22">Temporal lobe</searchLink><br /><searchLink fieldCode="DE" term="%22Quantitative+research%22">Quantitative research</searchLink><br /><searchLink fieldCode="DE" term="%22Drug+resistance%22">Drug resistance</searchLink><br /><searchLink fieldCode="DE" term="%22Brain-computer+interfaces%22">Brain-computer interfaces</searchLink><br /><searchLink fieldCode="DE" term="%22Temporal+lobectomy%22">Temporal lobectomy</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Objectives: To evaluate the usefulness of quantitative electroencephalography (qEEG) in the analysis of baseline activity in patients with temporal lobe epilepsy (TLE) and identify measures potentially associated with disease duration and drug resistance. Materials and Methods: Cross‐sectional study of adult patients with TLE and controls who underwent video‐EEG monitoring. Representative artifact‐free resting wakefulness baseline EEG segments were selected for quantitative analysis. The fast Fourier transform (FFT) approach was used for the power spectral analysis, with computation of FFT power ratios and alpha‐delta and alpha‐theta ratios for both hemispheres. The resulting measures were compared between TLE patients and controls and their values as predictors of epilepsy duration and drug resistance analyzed. Results: Thirty‐nine TLE patients and 23 controls were included. The TLE patients had a lower alpha‐delta ratio in the posterior quadrant ipsilateral to the epileptic focus and a lower alpha‐theta ratio in the ipsilateral anterior/posterior quadrants and temporal region. A younger age at onset and longer epilepsy duration correlated with a higher theta power ratio in the contralateral anterior and posterior quadrants and temporal region. No qEEG measures predicted drug resistance. Conclusions: Quantitative electroencephalography background activity may contribute to the diagnosis of TLE and provide useful information on disease duration. A lower alpha‐delta and alpha‐theta ratio may be reliable baseline qEEG measures for identifying patients with TLE. A higher contralateral theta power ratio may be indicative of longer epilepsy duration. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Acta Neurologica Scandinavica is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1111/ane.13543
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        Text: English
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        StartPage: 239
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      – SubjectFull: Temporal lobe epilepsy
        Type: general
      – SubjectFull: Epilepsy
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      – SubjectFull: Fast Fourier transforms
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      – SubjectFull: Temporal lobe
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      – SubjectFull: Quantitative research
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      – SubjectFull: Drug resistance
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      – SubjectFull: Brain-computer interfaces
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      – SubjectFull: Temporal lobectomy
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      – TitleFull: Interictal brain activity changes in temporal lobe epilepsy: A quantitative electroencephalogram analysis.
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              Text: Feb2022
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