Figure 4.

Variations in current input between neuron subsets leads to changes in average frequency and phase. (A) The difference in average frequency of the two neuron populations shows a positive relationship with the difference in current input, labeled as I_offset, when ${\overline{g}}_{Ks}$ is 0.0. (B) Raster plot shows phase leading in spike times of neuron subset. The raster plot shows spike times for neuron population where 20 neurons receive an additional current input of 1.95 μA/cm². Blue rasters indicate subpopulation with additional current while black rasters indicate sub population with baseline current input. Red trace shows convolution of spike times with Gaussian function which is used to define the phase reference. The above simulation is conducted with a ${\overline{g}}_{Ks}$ value of 1.5. (C) Phase difference between subpopulation with additional current input and subpopulation with baseline current input shows a negative relationship with the current input. (D) Comparison of the phase difference and frequency difference for a given current input. Plot shows comparison of phase difference for ${\overline{g}}_{Ks}$ = 1.5 and frequency difference for ${\overline{g}}_{Ks}$ = 0.0 for a given current offset.