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Fluctuations in instantaneous frequency predict alpha amplitude during visual perception

Author

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  • Stephanie Nelli

    (Neurosciences Graduate Program, University of California)

  • Sirawaj Itthipuripat

    (Neurosciences Graduate Program, University of California
    Learning Institute, King Mongkut’s University of Technology Thonburi)

  • Ramesh Srinivasan

    (University of California
    Department of Biomedical Engineering, University of California)

  • John T. Serences

    (Neurosciences Graduate Program, University of California
    University of California
    Kavli Institute for Brain and Mind, University of California)

Abstract

Rhythmic neural activity in the alpha band (8–13 Hz) is thought to have an important role in the selective processing of visual information. Typically, modulations in alpha amplitude and instantaneous frequency are thought to reflect independent mechanisms impacting dissociable aspects of visual information processing. However, in complex systems with interacting oscillators such as the brain, amplitude and frequency are mathematically dependent. Here, we record electroencephalography in human subjects and show that both alpha amplitude and instantaneous frequency predict behavioral performance in the same visual discrimination task. Consistent with a model of coupled oscillators, we show that fluctuations in instantaneous frequency predict alpha amplitude on a single trial basis, empirically demonstrating that these metrics are not independent. This interdependence suggests that changes in amplitude and instantaneous frequency reflect a common change in the excitatory and inhibitory neural activity that regulates alpha oscillations and visual information processing.

Suggested Citation

  • Stephanie Nelli & Sirawaj Itthipuripat & Ramesh Srinivasan & John T. Serences, 2017. "Fluctuations in instantaneous frequency predict alpha amplitude during visual perception," Nature Communications, Nature, vol. 8(1), pages 1-12, December.
    • Handle: RePEc:nat:natcom:v:8:y:2017:i:1:d:10.1038_s41467-017-02176-x
    DOI: 10.1038/s41467-017-02176-x
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