Critical Slowing Down Governs the Transition to Neuron Spiking
Fig 5
Scaling analysis of indicators related to critical slowing down in fast-spiking (FS) neurons.
a, Photomicrograph of a typical FS neuron with round morphology and responses to depolarizing and hyperpolarizing currents. Right: the f-I relationship shows a discontinuity in frequency at the onset of spiking. Different markers correspond to different neurons; for comparability the injected current has been normalized to the onset of spiking. b, FS neurons (red markers) could be distinguished from pyramidal neurons (blue markers) by shorter spike width and greater afterhyperpolarization (AHP) values. c, Exponents (mean ± standard deviation) for recovery rate (θ, round markers) and variance (τ, diamonds) for different minimal values ΔImin of the fit.