![]() ![]() ![]() Function in the human connectome: task-fMRI and individual differences in behavior. Topological turbulence in the membrane of a living cell. Electromechanical vortex filaments during cardiac fibrillation. Engineering bacterial vortex lattice via direct laser lithography. Onsager and the theory of hydrodynamic turbulence. Two-dimensional nematic colloidal crystals self-assembled by topological defects. Muševič, I., Škarabot, M., Tkalec, U., Ravnik, M. Spontaneous motion in hierarchically assembled active matter. Eigenmodes of brain activity: neural field theory predictions and comparison with experiment. Metastable oscillatory modes emerge from synchronization in the brain spacetime connectome. Ghost attractors in spontaneous brain activity: recurrent excursions into functionally-relevant fMRI phase-locking states. Vohryzek, J., Deco, G., Cessac, B., Kringelbach, M. Human brain networks function in connectome-specific harmonic waves. On nodes and modes in resting state fMRI. Development of top-down propagation in youth. A parsimonious description of global functional brain organization in three spatiotemporal patterns. Propagating patterns of intrinsic activity along macroscale gradients coordinate functional connections across the whole brain. Brain activity fluctuations propagate as waves traversing the cortical hierarchy. Latency analysis of resting-state BOLD-fMRI reveals traveling waves in visual cortex linking task-positive and task-negative networks. Dynamic mode decomposition of resting-state and task fMRI. Transient neuronal coactivations embedded in globally propagating waves underlie resting-state functional connectivity. Lag threads organize the brain’s intrinsic activity. Spatiotemporal dynamics of low frequency BOLD fluctuations in rats and humans. Propagation and stability of waves of electrical activity in the cerebral cortex. Field theory of electromagnetic brain activity. Neocortical Dynamics and Human EEG Rhythms (Oxford Univ. Emergence of complex wave patterns in primate cerebral cortex. ![]() Functional connectivity dynamically evolves on multiple time-scales over a static structural connectome: models and mechanisms. Empirical estimation of the eigenmodes of macroscale cortical dynamics: Reconciling neural field eigenmodes and resting-state networks. Gamma and beta bursts underlie working memory. Single neurons may encode simultaneous stimuli by switching between activity patterns. Time-resolved resting-state brain networks. ![]() Zalesky, A., Fornito, A., Cocchi, L., Gollo, L. Tracking whole-brain connectivity dynamics in the resting state. Dynamic functional connectivity: promise, issues, and interpretations. Brain network dynamics are hierarchically organized in time. The default mode network in cognition: a topographical perspective. Neural basis of global resting-state fMRI activity. Functional interactions between intrinsic brain activity and behavior. Situating the default-mode network along a principal gradient of macroscale cortical organization. Brain networks and cognitive architectures. The human brain is intrinsically organized into dynamic, anticorrelated functional networks. Macroscopic gradients of synaptic excitation and inhibition in the neocortex. The neocortical circuit: themes and variations. Detection and analysis of spatiotemporal patterns in brain activity. Cortical travelling waves: mechanisms and computational principles. Our findings suggest that brain spirals organize complex spatiotemporal dynamics of the human brain and have functional correlates to cognitive processing. We also demonstrate that multiple, interacting brain spirals are involved in coordinating the correlated activations and de-activations of distributed functional regions this mechanism enables flexible reconfiguration of task-driven activity flow between bottom-up and top-down directions during cognitive processing. The properties of these brain spirals, such as their rotational directions and locations, are task relevant and can be used to classify different cognitive tasks. These brain spirals propagate across the cortex while rotating around their phase singularity centres, giving rise to spatiotemporal activity dynamics with non-stationary features. Here by characterizing moment-by-moment fluctuations of human cortical functional magnetic resonance imaging signals, we show that spiral-like, rotational wave patterns (brain spirals) are widespread during both resting and cognitive task states. The large-scale activity of the human brain exhibits rich and complex patterns, but the spatiotemporal dynamics of these patterns and their functional roles in cognition remain unclear. ![]()
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