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Related Experiment Video

Updated: Jan 19, 2026

Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures
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Neuronal avalanches and time-frequency representations in stimulus-evoked activity.

Oshrit Arviv1,2,3, Abraham Goldstein4,5, Oren Shriki6,7,8

  • 1Department of Cognitive and Brain Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel. Oshrit.Arviv@biu.ac.il.

Scientific Reports
|September 19, 2019
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Summary

Neuronal avalanches in the brain exhibit critical dynamics. This study shows that fixed analysis parameters reveal genuine changes in stimulus-evoked brain activity, maintaining scale-invariance.

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Area of Science:

  • Neuroscience
  • Computational Neuroscience
  • Brain Dynamics

Background:

  • Neuronal avalanches are key to understanding critical brain dynamics.
  • A debate exists on analyzing stimulus-evoked activity versus ongoing activity.
  • Stimulus-evoked brain activity varies, questioning fixed analysis parameters.

Purpose of the Study:

  • To explore the relationship between neuronal avalanches and time-frequency representations of stimulus-evoked activity.
  • To determine if fixed neuronal avalanche analysis parameters can capture dynamic changes during evoked responses.

Main Methods:

  • Analysis of neuronal avalanche metrics using fixed threshold and temporal scale.
  • Correlation of avalanche metrics with time-frequency representations (event-related synchronization/desynchronization).
  • Examination of power-law exponents, branching parameter (neural gain), and spatio-temporal avalanche spread.

Main Results:

  • Neuronal avalanche metrics with fixed parameters accurately reflect underlying dynamic changes.
  • Event-related synchronization and desynchronization correlate with variations in avalanche size distribution exponents and neural gain.
  • Scale-invariant avalanche behavior is a robust feature of healthy brain dynamics across different stimulus-evoked periods and frequency bands.

Conclusions:

  • Fixed neuronal avalanche analysis parameters are sufficient to reveal genuine dynamic shifts during stimulus-evoked activity.
  • Brain dynamics may operate within an extended critical region during stimulus-evoked responses.
  • Scale-invariance of neuronal avalanches is a fundamental property of healthy brain function.