AN EXCITABLE ELECTRONIC CIRCUIT AS A SENSORY NEURON MODEL

作者：Medeiros Bruno N S^*; Minces Victor; Mindlin Gabriel B; Copelli Mauro; Rios Leite Jose R

来源：International Journal of Bifurcation and Chaos, 2012, 22(10): 1250244.

DOI：10.1142/S0218127412502446

• Electronic circuit
• excitable element
• coherence resonance
• dynamic range

An electronic circuit device, inspired on the FitzHugh-Nagumo model of neuronal excitability, was constructed and shown to operate with characteristics compatible with those of biological sensory neurons. The nonlinear dynamical model of the electronics quantitatively reproduces the experimental observations on the circuit, including the Hopf bifurcation at the onset of tonic spiking. Moreover, we have implemented an analog noise generator as a source to study the variability of the spike trains. When the circuit is in the excitable regime, coherence resonance is observed. At sufficiently low noise intensity the spike trains have Poisson statistics, as in many biological neurons. The transfer function of the stochastic spike trains has a dynamic range of 6 dB, close to experimental values for real olfactory receptor neurons.

• 出版日期2012-10