Mathematical Modeling of Subthreshold Resonant Properties in Pyloric Dilator Neurons

Figure 8

Effects of removing on resonance at different resting potentials. (a) Voltage response to the Chirp input at the hyperpolarized resting potential (−80 mV) under control condition (upper trace) and after removing (lower trace). (b) Impedance magnitude, as a function of frequency. At hyperpolarized resting potential, both the impedance magnitude () and resonance frequency () disappeared by removing . (c) In the phase profile, the resonant property is removed by removing at hyperpolarized resting potential. (d) Voltage response at the depolarized resting potential (−53 mV) under control condition (upper trace) and after removing (lower trace). (e) At depolarized resting potential, by removing , the impedance magnitude is increased and resonance frequency is transferred to the lower frequencies. (f) In the phase profile, the resonant property is decreased at depolarized resting potential. The fluctuating form of phase curve is caused by ionic channels properties (high nonlinearity of HH-type dynamics of PD neurons).