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Prog Neurobiol. 2017 Nov;158:132-152. doi: 10.1016/j.pneurobio.2017.07.002. Epub 2017 Jul 19.

Criticality in the brain: A synthesis of neurobiology, models and cognition.

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QIMR Berghofer Medical Research Institute, Brisbane, Australia. Electronic address:
QIMR Berghofer Medical Research Institute, Brisbane, Australia.
Melbourne Neuropsychiatry Centre, The University of Melbourne, Melbourne, Australia.
QIMR Berghofer Medical Research Institute, Brisbane, Australia; Metro North Mental Health Service, Brisbane, Australia.


Cognitive function requires the coordination of neural activity across many scales, from neurons and circuits to large-scale networks. As such, it is unlikely that an explanatory framework focused upon any single scale will yield a comprehensive theory of brain activity and cognitive function. Modelling and analysis methods for neuroscience should aim to accommodate multiscale phenomena. Emerging research now suggests that multi-scale processes in the brain arise from so-called critical phenomena that occur very broadly in the natural world. Criticality arises in complex systems perched between order and disorder, and is marked by fluctuations that do not have any privileged spatial or temporal scale. We review the core nature of criticality, the evidence supporting its role in neural systems and its explanatory potential in brain health and disease.


Bifurcations; Cognition; Dynamics; Metastability; Multistability; Power-law

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