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Updated: Jul 1, 2026
16:01
Multi-electrode Array Recordings of Neuronal Avalanches in Organotypic Cultures
Published on: August 1, 2011
The organizing principles of neuronal avalanches: cell assemblies in the cortex?
Dietmar Plenz1, Tara C Thiagarajan
1Section of Neural Network Physiology, National Institute of Mental Health, Porter Neuroscience Research Center, 35 Convent Drive, Bethesda, MD 20892, USA. plenzd@mail.nih.gov
Trends in Neurosciences
|February 6, 2007
Summary
Neuronal avalanches, spatiotemporal patterns of brain activity, exhibit fractal organization and may represent transient cell assemblies. These findings suggest a critical state underlying cortical network dynamics.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Systems Neuroscience
Background:
- Neuronal avalanches are spontaneous spatiotemporal patterns observed in the mammalian cortex.
- These patterns exhibit rich diversity and recurrence over extended periods.
Purpose of the Study:
- To investigate the statistical organization and fractal properties of neuronal avalanches.
- To explore the relationship between neuronal avalanches and cell assembly formation.
- To discuss models of cortical dynamics in a critical regime.
Main Methods:
- Analysis of spatiotemporal patterns of neuronal activity.
- Statistical analysis of pattern size distribution across spatial scales.
- Review of theoretical models for neuronal dynamics.
Main Results:
- Neuronal avalanche size distribution is scale-invariant, indicating fractal organization.
- Functional connectivity in the cortex operates across all spatial scales.
- Patterns recur over hours, suggesting stable underlying network properties.
Conclusions:
- Neuronal avalanches likely reflect the transient formation of cell assemblies.
- Cortical dynamics may operate in a critical state, balancing flexibility and stability.
- Fractal organization suggests a universal mechanism for information processing in the cortex.
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