Partial synchronization in empirical brain networks as a model for unihemispheric sleep

Abstract

We analyze partial synchronization patterns in a network of FitzHugh-Nagumo oscillators with empirical structural connectivity measured in healthy human subjects. We report a dynamical asymmetry between the hemispheres, induced by the natural structural asymmetry. We show that the dynamical asymmetry can be enhanced by introducing the inter-hemispheric coupling strength as a control parameter for partial synchronization patterns. We specify the possible modalities for existence of unihemispheric sleep in human brain, where one hemisphere sleeps while the other remains awake. In fact, this state is common among migratory birds and mammals like aquatic species.

7 pages, 6 figures

References in corpus (3)

• Chimera states: Coexistence of coherence and incoherence in networks of coupled oscillators
• Spike Avalanches Exhibit Universal Dynamics across the Sleep-Wake Cycle
• Spontaneous Synchrony Breaking

Cited by in corpus (4)

• Birth and stabilization of phase clusters by multiplexing of adaptive networks
• Structural anomalies in brain networks induce dynamical pacemaker effects
• Synchronization of wave structures in a heterogeneous multiplex network of 2D vdP lattices with attractive and repulsive intra-layer coupling
• Chimera states in ring-star network of Chua circuits