Max Planck Institute for Dynamics and Self-Organization -- Department for Nonlinear Dynamics and Network Dynamics Group
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BCCN AG-Seminar

Tuesday, 12.05.2015 17 c.t.

Large-scale brain dynamics and connectivity across different states of consciousness

by Dr. Enzo Tagliazucchi
from Institute of Medical Psychology and Medical Sociology, Kiel

Contact person: Viola Priesemann


Ludwig Prandtl lecture hall


The human brain is continuously active, even during states such as deep sleep or under anesthesia. It is currently unknown which features of this spontaneous activity represent signatures of conscious awareness and which may correspond to a dynamical and ever-changing baseline. To answer these questions we conduct large-scale multi-modal and non-invasive recordings of brain anatomy and function during different states of conscious awareness including wakefulness, sleep, anesthesia, epilepsy and under the influence of psychedelic drugs. Analysis of this data consistently reveals localised changes in dynamics underlying states of altered consciousness, including a shift towards less complex temporal fluctuations, loss of spatial coherence and a decoupling of functional and structural connections. These empirical observations can be accommodated by a departure from the critical state in a conceptual model incorporating realistic anatomical connectivity.

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