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Hemispheric asymmetries in the EEG: Is there an association between N1 lateralization and alpha asymmetry?

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Title: Hemispheric asymmetries in the EEG: Is there an association between N1 lateralization and alpha asymmetry?
Authors: Reinke, Petunia (AUTHOR), Deneke, Lisa (AUTHOR), Ocklenburg, Sebastian (AUTHOR)
Source: Laterality. Jan2026, Vol. 31 Issue 1, p40-89. 50p.
Subjects: Cerebral hemispheres, Statistical power analysis, Repeated measures design, Data analysis, T-test (Statistics), Electroencephalography, Evoked potentials (Electrophysiology), Questionnaires, Artificial intelligence, Visual evoked response, Descriptive statistics, Signal processing, Analysis of variance, Statistics, Cerebral dominance, Brain waves, Data analysis software, Cognition, Handedness
Geographic Terms: Germany
Abstract: Several cognitive systems in the human brain, such as language and face processing, are organized asymmetrically. One of the primary neuroscientific methods to assess such functional hemispheric asymmetries is electroencephalography (EEG). The two major forms of analyzing asymmetries in the EEG signal are event-related potentials (ERPs), such as the N1, and oscillations, such as the alpha band. However, the relationships between these two forms of EEG asymmetries are not well understood. Therefore, it was the aim of the present study to (1) replicate previous results on N1 and alpha band asymmetries and (2) assess whether they show a negative correlation with each other, as could be expected from the hypothesis that alpha represents an absence of cognition. To this end, we tested n = 100 left-, mixed-, and right-handed participants with EEG Resting-State, as well as task-based EEG with words, faces, emotional faces, and houses as stimuli. Replication of previous EEG asymmetry findings showed mixed results. Interestingly, we found strong positive associations between individual ERP and alpha band asymmetries. This finding highlights the need to reassess the functional role of alpha asymmetries and suggests that they do not only reflect the absence of cognition but also reflect active neuronal processing asymmetries. [ABSTRACT FROM AUTHOR]
Copyright of Laterality is the property of Taylor & Francis Ltd 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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  Data: Hemispheric asymmetries in the EEG: Is there an association between N1 lateralization and alpha asymmetry?
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  Data: <searchLink fieldCode="AR" term="%22Reinke%2C+Petunia%22">Reinke, Petunia</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Deneke%2C+Lisa%22">Deneke, Lisa</searchLink> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ocklenburg%2C+Sebastian%22">Ocklenburg, Sebastian</searchLink> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Laterality%22">Laterality</searchLink>. Jan2026, Vol. 31 Issue 1, p40-89. 50p.
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  Data: <searchLink fieldCode="DE" term="%22Cerebral+hemispheres%22">Cerebral hemispheres</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+power+analysis%22">Statistical power analysis</searchLink><br /><searchLink fieldCode="DE" term="%22Repeated+measures+design%22">Repeated measures design</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis%22">Data analysis</searchLink><br /><searchLink fieldCode="DE" term="%22T-test+%28Statistics%29%22">T-test (Statistics)</searchLink><br /><searchLink fieldCode="DE" term="%22Electroencephalography%22">Electroencephalography</searchLink><br /><searchLink fieldCode="DE" term="%22Evoked+potentials+%28Electrophysiology%29%22">Evoked potentials (Electrophysiology)</searchLink><br /><searchLink fieldCode="DE" term="%22Questionnaires%22">Questionnaires</searchLink><br /><searchLink fieldCode="DE" term="%22Artificial+intelligence%22">Artificial intelligence</searchLink><br /><searchLink fieldCode="DE" term="%22Visual+evoked+response%22">Visual evoked response</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Signal+processing%22">Signal processing</searchLink><br /><searchLink fieldCode="DE" term="%22Analysis+of+variance%22">Analysis of variance</searchLink><br /><searchLink fieldCode="DE" term="%22Statistics%22">Statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Cerebral+dominance%22">Cerebral dominance</searchLink><br /><searchLink fieldCode="DE" term="%22Brain+waves%22">Brain waves</searchLink><br /><searchLink fieldCode="DE" term="%22Data+analysis+software%22">Data analysis software</searchLink><br /><searchLink fieldCode="DE" term="%22Cognition%22">Cognition</searchLink><br /><searchLink fieldCode="DE" term="%22Handedness%22">Handedness</searchLink>
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  Data: Several cognitive systems in the human brain, such as language and face processing, are organized asymmetrically. One of the primary neuroscientific methods to assess such functional hemispheric asymmetries is electroencephalography (EEG). The two major forms of analyzing asymmetries in the EEG signal are event-related potentials (ERPs), such as the N1, and oscillations, such as the alpha band. However, the relationships between these two forms of EEG asymmetries are not well understood. Therefore, it was the aim of the present study to (1) replicate previous results on N1 and alpha band asymmetries and (2) assess whether they show a negative correlation with each other, as could be expected from the hypothesis that alpha represents an absence of cognition. To this end, we tested n = 100 left-, mixed-, and right-handed participants with EEG Resting-State, as well as task-based EEG with words, faces, emotional faces, and houses as stimuli. Replication of previous EEG asymmetry findings showed mixed results. Interestingly, we found strong positive associations between individual ERP and alpha band asymmetries. This finding highlights the need to reassess the functional role of alpha asymmetries and suggests that they do not only reflect the absence of cognition but also reflect active neuronal processing asymmetries. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Laterality is the property of Taylor & Francis Ltd 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.)
PLink https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=pbh&AN=192657035
RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1080/1357650X.2025.2591660
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      – Code: eng
        Text: English
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        PageCount: 50
        StartPage: 40
    Subjects:
      – SubjectFull: Cerebral hemispheres
        Type: general
      – SubjectFull: Statistical power analysis
        Type: general
      – SubjectFull: Repeated measures design
        Type: general
      – SubjectFull: Data analysis
        Type: general
      – SubjectFull: T-test (Statistics)
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      – SubjectFull: Electroencephalography
        Type: general
      – SubjectFull: Evoked potentials (Electrophysiology)
        Type: general
      – SubjectFull: Questionnaires
        Type: general
      – SubjectFull: Artificial intelligence
        Type: general
      – SubjectFull: Visual evoked response
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      – SubjectFull: Descriptive statistics
        Type: general
      – SubjectFull: Signal processing
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      – SubjectFull: Analysis of variance
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      – SubjectFull: Statistics
        Type: general
      – SubjectFull: Cerebral dominance
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      – SubjectFull: Brain waves
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      – SubjectFull: Data analysis software
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      – SubjectFull: Cognition
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      – SubjectFull: Handedness
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      – SubjectFull: Germany
        Type: general
    Titles:
      – TitleFull: Hemispheric asymmetries in the EEG: Is there an association between N1 lateralization and alpha asymmetry?
        Type: main
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            NameFull: Reinke, Petunia
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            NameFull: Deneke, Lisa
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            NameFull: Ocklenburg, Sebastian
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            – D: 01
              M: 01
              Text: Jan2026
              Type: published
              Y: 2026
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            – TitleFull: Laterality
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