Feedback control of variability in the cycle period of a central pattern generator

Journal of Neurophysiology
Ryan M HooperAstrid A Prinz

Abstract

We address how feedback to a bursting biological pacemaker with intrinsic variability in cycle length can affect that variability. Specifically, we examine a hybrid circuit constructed of an isolated crab anterior burster (AB)/pyloric dilator (PD) pyloric pacemaker receiving virtual feedback via dynamic clamp. This virtual feedback generates artificial synaptic input to PD with timing determined by adjustable phase response dynamics that mimic average burst intervals generated by the lateral pyloric neuron (LP) in the intact pyloric network. Using this system, we measure network period variability dependence on the feedback element's phase response dynamics and find that a constant response interval confers minimum variability. We further find that these optimal dynamics are characteristic of the biological pyloric network. Building upon our previous theoretical work mapping the firing intervals in one cycle onto the firing intervals in the next cycle, we create a theoretical map of the distribution of all firing intervals in one cycle to the distribution of firing intervals in the next cycle. We then obtain an integral equation for a stationary self-consistent distribution of the network periods of the hybrid circuit, which ca...Continue Reading

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Citations

Jul 28, 2016·Current Opinion in Neurobiology·Nelly DaurDirk Bucher
Aug 16, 2018·Physiology·Jan-Marino Ramirez, Nathan Baertsch
Mar 28, 2019·Frontiers in Neuroinformatics·Rodrigo AmaducciPablo Varona
Mar 7, 2017·Frontiers in Computational Neuroscience·Irene Elices, Pablo Varona
Jun 23, 2019·Scientific Reports·Irene ElicesPablo Varona

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