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Distinct beta frequencies reflect categorical decisions

Author

Listed:
  • Elie Rassi

    (Radboud University
    Paris-Lodron-University of Salzburg)

  • Yi Zhang

    (Columbia University)

  • Germán Mendoza

    (Campus Juriquilla)

  • Juan Carlos Méndez

    (University of Oxford
    University of Exeter)

  • Hugo Merchant

    (Campus Juriquilla)

  • Saskia Haegens

    (Radboud University
    Columbia University
    New York State Psychiatric Institute)

Abstract

Based on prior findings of content-specific beta synchronization in working memory and decision making, we hypothesized that beta oscillations support the (re-)activation of cortical representations by mediating neural ensemble formation. We found that beta activity in monkey dorsolateral prefrontal cortex (dlPFC) and pre-supplementary motor area (preSMA) reflects the content of a stimulus in relation to the task context, regardless of its objective properties. In duration- and distance-categorization tasks, we changed the boundary between categories from one block of trials to the next. We found that two distinct beta-band frequencies were consistently associated with the two relative categories, with activity in these bands predicting the animals’ responses. We characterized beta at these frequencies as transient bursts, and showed that dlPFC and preSMA are connected via these distinct frequency channels. These results support the role of beta in forming neural ensembles, and further show that such ensembles synchronize at different beta frequencies.

Suggested Citation

  • Elie Rassi & Yi Zhang & Germán Mendoza & Juan Carlos Méndez & Hugo Merchant & Saskia Haegens, 2023. "Distinct beta frequencies reflect categorical decisions," Nature Communications, Nature, vol. 14(1), pages 1-10, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-38675-3
    DOI: 10.1038/s41467-023-38675-3
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    References listed on IDEAS

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    1. Germán Mendoza & Juan Carlos Méndez & Oswaldo Pérez & Luis Prado & Hugo Merchant, 2018. "Neural basis for categorical boundaries in the primate pre-SMA during relative categorization of time intervals," Nature Communications, Nature, vol. 9(1), pages 1-17, December.
    2. David J. Freedman & John A. Assad, 2006. "Experience-dependent representation of visual categories in parietal cortex," Nature, Nature, vol. 443(7107), pages 85-88, September.
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