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Panda R, López-González A, Gilson M, Gosseries O, Thibaut A, Frasso G, Cecconi B, Escrichs A, Deco G, Laureys S, Zamora-López G, Annen J. Whole-brain analyses indicate the impairment of posterior integration and thalamo-frontotemporal broadcasting in disorders of consciousness. Hum Brain Mapp 2023. [PMID: 37254960 DOI: 10.1002/hbm.26386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 05/05/2023] [Accepted: 05/11/2023] [Indexed: 06/01/2023] Open
Abstract
The study of the brain's dynamical activity is opening a window to help the clinical assessment of patients with disorders of consciousness. For example, glucose uptake and the dysfunctional spread of naturalistic and synthetic stimuli has proven useful to characterize hampered consciousness. However, understanding of the mechanisms behind loss of consciousness following brain injury is still missing. Here, we study the propagation of endogenous and in-silico exogenous perturbations in patients with disorders of consciousness, based upon directed and causal interactions estimated from resting-state fMRI data, fitted to a linear model of activity propagation. We found that patients with disorders of consciousness suffer decreased capacity for neural propagation and responsiveness to events, and that this can be related to severe reduction of glucose metabolism as measured with [18 F]FDG-PET. In particular, we show that loss of consciousness is related to the malfunctioning of two neural circuits: the posterior cortical regions failing to convey information, in conjunction with reduced broadcasting of information from subcortical, temporal, parietal and frontal regions. These results shed light on the mechanisms behind disorders of consciousness, triangulating network function with basic measures of brain integrity and behavior.
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Affiliation(s)
- Rajanikant Panda
- Coma Science Group, GIGA-Consciousness, University of Liège, Liège, Belgium
- University Hospital of Liège, Liège, Belgium
| | - Ane López-González
- Center for Brain and Cognition, Department of Information and Communication Technologies, Pompeu Fabra University, Barcelona, Spain
| | - Matthieu Gilson
- Center for Brain and Cognition, Department of Information and Communication Technologies, Pompeu Fabra University, Barcelona, Spain
- Institut des Neurosciences des Systemes, INSERM-AMU, Marseille, France
| | - Olivia Gosseries
- Coma Science Group, GIGA-Consciousness, University of Liège, Liège, Belgium
- University Hospital of Liège, Liège, Belgium
| | - Aurore Thibaut
- Coma Science Group, GIGA-Consciousness, University of Liège, Liège, Belgium
- University Hospital of Liège, Liège, Belgium
| | - Gianluca Frasso
- Wageningen Food Safety Research, Wageningen, The Netherlands
| | - Benedetta Cecconi
- Coma Science Group, GIGA-Consciousness, University of Liège, Liège, Belgium
- University Hospital of Liège, Liège, Belgium
| | - Anira Escrichs
- Center for Brain and Cognition, Department of Information and Communication Technologies, Pompeu Fabra University, Barcelona, Spain
| | - Gustavo Deco
- Center for Brain and Cognition, Department of Information and Communication Technologies, Pompeu Fabra University, Barcelona, Spain
- Institució Catalana de la Recerça i Estudis Avançats (ICREA), Barcelona, Catalonia, Spain
- Department of Neuropsychology, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany
- School of Psychological Sciences, Monash University, Victoria, Australia
| | - Steven Laureys
- Coma Science Group, GIGA-Consciousness, University of Liège, Liège, Belgium
- University Hospital of Liège, Liège, Belgium
- CERVO Research Center, Laval University, Québec, Quebec, Canada
| | - Gorka Zamora-López
- Center for Brain and Cognition, Department of Information and Communication Technologies, Pompeu Fabra University, Barcelona, Spain
| | - Jitka Annen
- Coma Science Group, GIGA-Consciousness, University of Liège, Liège, Belgium
- University Hospital of Liège, Liège, Belgium
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