Stability of Neural Firing in the Trigeminal Nuclei under Mechanical Whisker Stimulation

Figure 2

Wavelet analysis of a spike train. (a) Conversion of extracellular recording into a spike train, 𝑛(𝑡). (b) Energy density 𝐸(𝑓,𝑡) of the spike train (color from blue to red corresponds to the spectrum magnitude). Dashed black curve defines the cone of influence where the edge effects canot be neglected. (c) Time evolution of “spectral ridges” 𝐹_𝑘(𝑡). Thick curve corresponds to the main (most prominent and stable) ridge, whose central frequency varies in time around 20 Hz.

(a) Extracellular potential

(b) Wavelet power spectum

(c) Time evolution of spectral ridges