Experimental evidence of a chaotic region in a neural pacemaker

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

28 Scopus Citations
View graph of relations


Related Research Unit(s)


Original languageEnglish
Pages (from-to)718-720
Journal / PublicationPhysics Letters, Section A: General, Atomic and Solid State Physics
Issue number9
Publication statusPublished - 15 Mar 2013


In this Letter, we report the finding of period-adding scenarios with chaos in firing patterns, observed in biological experiments on a neural pacemaker, with fixed extra-cellular potassium concentration at different levels and taken extra-cellular calcium concentration as the bifurcation parameter. The experimental bifurcations in the two-dimensional parameter space demonstrate the existence of a chaotic region interwoven with the periodic region thereby forming a period-adding sequence with chaos. The behavior of the pacemaker in this region is qualitatively similar to that of the Hindmarsh-Rose neuron model in a well-known comb-shaped chaotic region in two-dimensional parameter spaces. © 2013 Elsevier B.V.

Research Area(s)

  • Bifurcation, Chaos, Hindmarsh-Rose model, Neural firing pattern