Fluctuating excitability : a mechanism for self-sustained information flow in excitable arrays /
We show that the fluctuating excitability of FitzHugh-Nagumo neurons, constituting a diffusively coupled excitable array, can induce phase slips that lead to a symmetry break yielding a preferred spreading direction of excitatory events, thus enabling persistent self-sustained and self-organized inf...
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| Format: | Book Chapter |
| Jezik: | English |
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| Online dostop: | http://search.ebscohost.com/login.aspx?direct=true&db=aph&AN=23350699&site=ehost-live http://www.elsevier.com/locate/chaos |
| Sorodne knjige/članki: | Vsebovano v:
Chaos, solitons and fractals |
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| Izvleček: | We show that the fluctuating excitability of FitzHugh-Nagumo neurons, constituting a diffusively coupled excitable array, can induce phase slips that lead to a symmetry break yielding a preferred spreading direction of excitatory events, thus enabling persistent self-sustained and self-organized information flow in a periodic array long after a localized stimulus perturbation has sized. Possible oscillation frequencies of the information-carrying signal are expressed analytically, and necessary conditions for the phenomenon are derived. Our results suggest that cellular diversity in neural tissue is crucial for maintaining self-sustained and organized activity in the brain even in the absence of immediate stimuli, thus facilitating continuous evolution of its mechanisms for information retrieval and storage. |
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| Opis knjige/članka: | May 2007. |
| Fizični opis: | str. 1118-1124. |
| Bibliografija: | Bibliografija: str. 1123-1124. |
| ISSN: | 0960-0779 |