Long-range phase synchronization of high-frequency oscillations in human cortex

G Arnulfo, S H Wang, V Myrov, B Toselli, J Hirvonen, M M Fato, L Nobili, F Cardinale, A Rubino, A Zhigalov, S Palva, J M Palva

Research output: Contribution to journalArticlepeer-review


Inter-areal synchronization of neuronal oscillations at frequencies below ~100 Hz is a pervasive feature of neuronal activity and is thought to regulate communication in neuronal circuits. In contrast, faster activities and oscillations have been considered to be largely local-circuit-level phenomena without large-scale synchronization between brain regions. We show, using human intracerebral recordings, that 100-400 Hz high-frequency oscillations (HFOs) may be synchronized between widely distributed brain regions. HFO synchronization expresses individual frequency peaks and exhibits reliable connectivity patterns that show stable community structuring. HFO synchronization is also characterized by a laminar profile opposite to that of lower frequencies. Importantly, HFO synchronization is both transiently enhanced and suppressed in separate frequency bands during a response-inhibition task. These findings show that HFO synchronization constitutes a functionally significant form of neuronal spike-timing relationships in brain activity and thus a mesoscopic indication of neuronal communication per se.

Original languageEnglish
Pages (from-to)5363
JournalNat. Commun.
Issue number1
Publication statusPublished - Oct 23 2020


  • Adult
  • Brain/pathology
  • Brain Mapping
  • Cerebral Cortex/physiology
  • Cortical Synchronization/physiology
  • Electric Stimulation
  • Electroencephalography
  • Humans
  • Male
  • Neurons/physiology
  • Young Adult

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