[en] Recently, significant advances have been made by identifying the levels of synchronicity of the underlying dynamics of a given brain state. This research has demonstrated that unconscious dynamics tend to be more synchronous than those found in conscious states, which are more asynchronous. Here we go beyond this dichotomy to demonstrate that the different brain states are always underpinned by spatiotemporal chaos but with dissociable turbulent dynamics. We investigated human neuroimaging data from different brain states (resting state, meditation, deep sleep, and disorders of consciousness after coma) and were able to distinguish between them using complementary model-free and model-based measures of turbulent information transmission. Our model-free approach used recent advances describing a measure of information cascade across spatial scales using tools from turbulence theory. Complementarily, our model-based approach used exhaustive in silico perturbations of whole-brain models fitted to the empirical neuroimaging data, which allowed us to study the information encoding capabilities of the brain states. Overall, the current framework demonstrates that different levels of turbulent dynamics are fundamental for describing and differentiating between brain states.
Disciplines :
Neurosciences & behavior
Author, co-author :
Escrichs, Anira; Universitat Pompeu Fabra
Perl, Yonatan Sanz; Universitat Pompeu Fabra
Uribe, Carme; University of Barcelona
Camara, Estela; L’Hospitalet de Llobregat
Türker, Basak; Institut du Cerveau et de la Moelle épinière
Pyatigorskaya, Nadya; Institut du Cerveau et de la Moelle épinière
López-González, Ane; Universitat Pompeu Fabra
Pallavicini, Carla; University of Buenos Aires
Panda, Rajanikant ; Université de Liège - ULiège > GIGA Consciousness - Coma Science Group
Annen, Jitka ; Université de Liège - ULiège > GIGA Consciousness - Coma Science Group ; CHU Liège - Central University Hospital of Liege > Centre du Cerveau²
Gosseries, Olivia ; Université de Liège - ULiège > GIGA Consciousness - Coma Science Group
Laureys, Steven ; Université de Liège - ULiège > GIGA Consciousness - Coma Science Group
Naccache, Lionel; Institut du Cerveau et de la Moelle épinière
Sitt, Jacobo D; Institut du Cerveau et de la Moelle épinière
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