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Traveling patterns of neuronal activity-brain waves-have been observed across a breadth of neuronal recordings, states of awareness, and species, but their emergence in the human brain lacks a firm understanding. Here we analyze the complex nonlinear dynamics that emerge from modeling large-scale spontaneous neural activity on a whole-brain network derived from human tractography. We find a rich array of three-dimensional wave patterns, including traveling waves, spiral waves, sources, and sinks. These patterns are metastable, such that multiple spatiotemporal wave patterns are visited in sequence. Transitions between states correspond to reconfigurations of underlying phase flows, characterized by nonlinear instabilities. These metastable dynamics accord with empirical data from multiple imaging modalities, including electrical waves in cortical tissue, sequential spatiotemporal patterns in resting-state MEG data, and large-scale waves in human electrocorticography. By moving the study of functional networks from a spatially static to an inherently dynamic (wave-like) frame, our work unifies apparently diverse phenomena across functional neuroimaging modalities and makes specific predictions for further experimentation.

Original publication

DOI

10.1038/s41467-019-08999-0

Type

Journal article

Journal

Nat Commun

Publication Date

05/03/2019

Volume

10

Keywords

Adolescent, Adult, Brain, Brain Waves, Computer Simulation, Diffusion Tensor Imaging, Electrocorticography, Female, Healthy Volunteers, Humans, Male, Models, Neurological, Nerve Net, Neurons, Nonlinear Dynamics, Young Adult