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Power Laws from Linear Neuronal Cable Theory: Power Spectral Densities of the Soma Potential, Soma Membrane Current and Single-Neuron Contribution to the EEG

Figure 7

Dependence of PSDs on biophysical parameters for uncorrelated input.

PSDs of the soma current (row 1), current-dipole moment (row 2) and soma potential (row 3) for the ball and stick model with uncorrelated white-noise input currents homogeneously distributed throughout the membrane. The input density is two inputs per square micrometer, and the input current is assumed to have a constant (white noise) PSD, . The columns show variation with stick length (first column), specific membrane resistance (second column), stick diameter (third column) and soma diameter (fourth column) with values shown in the legends below the panels. All other parameters of the ball and stick neuron have default values: stick diameter , somatic diameter , stick length mm, specific membrane resistance , inner resistivity m and a specific membrane capacitance . The values of printed in the legends describe the powers of the slopes at 1000 Hz. The upper corresponds to the low value of the parameter varied (green), the middle corresponds to the default parameter (red), while the lower corresponds to the high value of the parameter varied (blue).

doi: https://doi.org/10.1371/journal.pcbi.1003928.g007