Irregular excitation patterns in reaction-diffusion systems due to perturbation by secondary pacemakers

DC FieldValueLanguage
dc.contributor.authorLenk, Claudia
dc.contributor.authorEinax, Mario
dc.contributor.authorMaass, Philipp
dc.date.accessioned2021-12-23T16:10:06Z-
dc.date.available2021-12-23T16:10:06Z-
dc.date.issued2013
dc.identifier.issn15393755
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/9157-
dc.description.abstractSpatiotemporal excitation patterns in the FitzHugh-Nagumo model are studied, which result from the disturbance of a primary pacemaker by a secondary pacemaker. The primary and secondary pacemakers generate regular waves with frequencies f(pace) and f(pert), respectively. The pacemakers are spatially separated, but waves emanating from them encounter each other via a small bridge. This leads to three different types I-III of irregular excitation patterns in disjunct domains of the f(pace)-f(pert) plane. Types I and II are caused by detachments of waves coming from the two pacemakers at corners of the bridge. Type III irregularities are confined to a boundary region of the system and originate from a partial penetration of the primary waves into a space, where circular wave fronts from the secondary pacemaker prevail. For this type, local frequencies can significantly exceed f(pace) and f(pert). The degree of irregularity found for the three different types is quantified by the entropy of the local frequency distribution and an order parameter for phase coherence. DOI: 10.1103/PhysRevE.87.042904
dc.description.sponsorshipLand Thuringen; Carl-Zeiss-Stiftung; Deutsche ForschungsgemeinschaftGerman Research Foundation (DFG) [MA 1636/8-1]; C.L. thanks the Land Thuringen and the Carl-Zeiss-Stiftung for financial support. P.M. gratefully acknowledges financial support from the Deutsche Forschungsgemeinschaft (Grant No. MA 1636/8-1).
dc.language.isoen
dc.publisherAMER PHYSICAL SOC
dc.relation.ispartofPHYSICAL REVIEW E
dc.subjectBREAKUP
dc.subjectCARDIAC TISSUE
dc.subjectCHRONIC ATRIAL-FIBRILLATION
dc.subjectCOMPLEX
dc.subjectFREQUENCY
dc.subjectINSIGHTS
dc.subjectMECHANISMS
dc.subjectPhysics
dc.subjectPhysics, Fluids & Plasmas
dc.subjectPhysics, Mathematical
dc.subjectREENTRY
dc.subjectSPIRAL WAVES
dc.subjectTURBULENCE
dc.titleIrregular excitation patterns in reaction-diffusion systems due to perturbation by secondary pacemakers
dc.typejournal article
dc.identifier.doi10.1103/PhysRevE.87.042904
dc.identifier.isiISI:000317203800005
dc.description.volume87
dc.description.issue4
dc.contributor.orcid0000-0002-3040-1265
dc.contributor.orcid0000-0002-1268-8688
dc.contributor.researcheridB-8243-2011
dc.contributor.researcheridH-4707-2012
dc.contributor.researcheridH-1477-2011
dc.identifier.eissn15502376
dc.publisher.placeONE PHYSICS ELLIPSE, COLLEGE PK, MD 20740-3844 USA
dcterms.isPartOf.abbreviationPhys. Rev. E
crisitem.author.deptFB 04 - Physik-
crisitem.author.deptidfb04-
crisitem.author.parentorgUniversität Osnabrück-
crisitem.author.netidMaPh688-
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