Coherence resonance for neuronal bursting with spike undershoot.

摘要: Although the bursting patterns with spike undershoot are involved achievement of physiological or cognitive functions brain synaptic noise, noise induced-coherence resonance (CR) from resting state subthreshold oscillations instead has been widely identified to play positive roles in information process. Instead, present paper, CR characterized by increase firstly and then decease peak value power spectrum trains is evoked a pattern undershoot, which means that minimal membrane potential within burst lower than between bursts, while cannot be without undershoot. With bifurcations fast-slow variable dissection method, classified into “Sub-Hopf/Fold” “Fold/Homoclinic” bursting, respectively. For trajectory very close spikes burst. Therefore, can induce more modulate regularity, leads appearance CR. quiescent not burst, cause for non-CR. The result provides novel case phenomenon extends scopes concept, presents enhance rather suppress helpful understanding dynamics nerve fiber neurons such patterns.