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About the Authors:
Gerald Hahn
Contributed equally to this work with: Gerald Hahn, Adrian Ponce-Alvarez
* E-mail: [email protected]
Affiliations Unité de Neuroscience, Information et Complexité (UNIC), CNRS, Gif-sur-Yvette, France, Center for Brain and Cognition, Computational Neuroscience Group, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
ORCID http://orcid.org/0000-0002-7069-0639
Adrian Ponce-Alvarez
Contributed equally to this work with: Gerald Hahn, Adrian Ponce-Alvarez
Affiliation: Center for Brain and Cognition, Computational Neuroscience Group, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain
ORCID http://orcid.org/0000-0003-1446-7392
Cyril Monier
Affiliation: Unité de Neuroscience, Information et Complexité (UNIC), CNRS, Gif-sur-Yvette, France
Giacomo Benvenuti
Affiliation: Institut des Neurosciences de la Timone, CNRS, Marseille, France
Arvind Kumar
Affiliations Bernstein Center for Computational Neuroscience, Freiburg, Germany, Dept. of Computational Science and Technology, School of Computer Science and Communication, KTH, Royal Institute of Technology, Stockholm, Sweden
Frédéric Chavane
Affiliation: Institut des Neurosciences de la Timone, CNRS, Marseille, France
ORCID http://orcid.org/0000-0001-7916-2640
Gustavo Deco
Affiliations Center for Brain and Cognition, Computational Neuroscience Group, Department of Information and Communication Technologies, Universitat Pompeu Fabra, Barcelona, Spain, Institució Catalana de la Recerca i Estudis Avançats, Universitat Pompeu Fabra, Barcelona, Spain, Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, School of Psychological Sciences, Monash University, Melbourne, Clayton, Victoria, Australia
Yves Frégnac
Affiliation: Unité de Neuroscience, Information et Complexité (UNIC), CNRS, Gif-sur-Yvette, FranceAbstract
Brain activity displays a large repertoire of dynamics across the sleep-wake cycle and even during anesthesia. It was suggested that criticality could serve as a unifying principle underlying the diversity of dynamics. This view has been supported by the observation of spontaneous bursts of cortical activity with scale-invariant sizes and durations, known as neuronal avalanches, in recordings of mesoscopic cortical signals. However, the existence of neuronal avalanches in spiking activity has been equivocal with studies reporting both its presence and absence. Here, we show that signs of criticality in spiking activity can change between synchronized and desynchronized cortical states. We analyzed the spontaneous activity in the primary visual cortex of the anesthetized cat and the awake monkey, and found that neuronal avalanches and thermodynamic indicators of criticality strongly depend on collective synchrony among neurons, LFP fluctuations, and behavioral state. We found that synchronized states are associated to criticality, large dynamical repertoire...