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Neuronal oscillations

Rhythmic changes in electrical activity are observed throughout the brain and result form reciprocal interactions between excitatory and inhibitory neurons. Synchronized activity of large numbers of neurons gives rise to macroscopic oscillations in electrical activity, which can be measured in EEG recordings.

Brain oscillations display a wide variety of dynamical patterns. The same neuronal network can express multiple oscillation frequencies at the same time, or the frequency can fluctuate over time, with different distinct frequencies appearing intermittently. In addition, the amplitude of oscillations can fluctuate, with episodes of high amplitude alternating irregularly with episodes of low amplitude.

Despite the importance of neuronal oscillations for cognitive functions, little is known about how these diverse patterns of oscillatory activity are generated.

To get insight into potential mechanisms, we investigate what patterns of oscillations emerge in computational models of neuronal networks and how oscillations in one network can influence the oscillatory activity in other networks.

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