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Synchronization through Uncorrelated Noise in Excitatory-Inhibitory Networks
Citation key Rebscher2022
Author Rebscher, L. and Obermayer, K. and Metzner, C.
Year 2022
Journal Front. Comput. Neurosci.
Volume 16
Abstract Gamma rhythms play a major role in many different processes in the brain, suchas attention, working memory, and sensory processing. Whiletypically considereddetrimental, counterintuitively noise can sometimes havebeneficial effects oncommunication and information transfer. Recently, Meng and Riecke showed thatsynchronization of interacting networks of inhibitory neurons in the gamma band(i.e., gamma generated through an ING mechanism) increaseswhile synchronizationwithin these networks decreases when neurons are subject touncorrelated noise.However, experimental and modeling studies point towardz an important role of thepyramidal-interneuronal network gamma (PING) mechanism in the cortex. Therefore,we investigated the effect of uncorrelated noise on the communication betweenexcitatory-inhibitory networks producing gamma oscillationsviaa PING mechanism. Ourresults suggest that, at least in a certain range of noise strengths and natural frequencydifferences between the regions, synaptic noise can have a supporting role in facilitatinginter-regional communication, similar to the ING case for aslightly larger parameter range.Furthermore, the noise-induced synchronization between networks is generated via adifferent mechanism than when synchronization is mediatedby strong synaptic coupling.Noise-induced synchronization is achieved by lowering synchronization within networkswhich allows the respective other network to impose its own gamma rhythm resulting insynchronization between networks.
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