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<p>Oscillations in the high gamma and ripple frequency ranges are known to coordinate local hippocampal and neocortical neuronal assemblies during memory encoding and recall. Here, we explored spatiotemporal dynamics and the role of global coordination of these fast oscillatory discharges across the sensory and associational cortical areas in distinct phases of memory processing. Individual bursts of high frequency oscillations were detected in intracranial recordings from epilepsy patients remembering word lists for immediate free recall. We found constant coincident bursting across visual and higher order processing areas, peaking before recall and elevated during encoding of words. This global co-bursting was modulated by memory processing, engaged approximately half of the recorded electrode contact sites, and clustered into a sequence of multiple consecutive bursting events. Our results suggest a general role of global coincident high frequency oscillations in organizing large-scale information processing across the brain necessary especially, but not exclusively, for memory functions.</p>

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Global coincident bursts of high frequency oscillations across the human cortex coordinate large-scale memory processing

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年3月15日

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  • Sathwik Prathapagiri,
  • Jan Cimbalnik,
  • Jesús S. García-Salinas,
  • Marina Galanina,
  • Lenka Jurkovicova,
  • Pavel Daniel,
  • Martin Kojan,
  • Robert Roman,
  • Martin Pail,
  • Wojciech Fortuna,
  • Monika Sluzewska-Niedzwiedz,
  • Pawel Tabakow,
  • Andrzej Czyzewski,
  • Milan Brazdil,
  • Michal T. Kucewicz

摘要

Oscillations in the high gamma and ripple frequency ranges are known to coordinate local hippocampal and neocortical neuronal assemblies during memory encoding and recall. Here, we explored spatiotemporal dynamics and the role of global coordination of these fast oscillatory discharges across the sensory and associational cortical areas in distinct phases of memory processing. Individual bursts of high frequency oscillations were detected in intracranial recordings from epilepsy patients remembering word lists for immediate free recall. We found constant coincident bursting across visual and higher order processing areas, peaking before recall and elevated during encoding of words. This global co-bursting was modulated by memory processing, engaged approximately half of the recorded electrode contact sites, and clustered into a sequence of multiple consecutive bursting events. Our results suggest a general role of global coincident high frequency oscillations in organizing large-scale information processing across the brain necessary especially, but not exclusively, for memory functions.