Abstract
We explore the model’s parameter space using detailed parameter sweeps and Latin hypercube sampling, demarcating regions of bursting, tonic, and excitable behavior. To study the sensitivity of various functional characteristics to changes in parameter values, we employ specialized smooth optimization methods for bursting neural models [8]. We find that the half-activation voltages for ICaT and INaP are most critical for control of interburst period and duty cycle. We also investigate the phase response properties of the ET cell model and its responses to periodic input.
Highlights
The glomeruli of the mammalian olfactory bulb are the initial loci of synaptic processing in the olfactory system, and they contain at least three classes of juxtaglomerular (JG) interneurons whose roles in odor processing are not well understood
We present a single-compartment, Hodgkin-Huxleystyle model of the External tufted (ET) cell which includes those identified membrane currents which are known to be essential for endogenous bursting: spiking sodium and potassium currents, a low-voltage activated T-type calcium current (ICaT), and a persistent sodium current (INaP) [5]
Passive membrane properties were based on data from the literature, while the kinetics of active currents were obtained from voltage clamp data using the ‘full-trace’ method of the NEUROFIT software package [6]
Summary
The glomeruli of the mammalian olfactory bulb are the initial loci of synaptic processing in the olfactory system, and they contain at least three classes of juxtaglomerular (JG) interneurons whose roles in odor processing are not well understood. We present a single-compartment, Hodgkin-Huxleystyle model of the ET cell which includes those identified membrane currents which are known to be essential for endogenous bursting: spiking sodium and potassium currents, a low-voltage activated T-type calcium current (ICaT), and a persistent sodium current (INaP) [5].
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call