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Modulation of voltage-dependent K+ conductances in photoreceptors trades off investment in contrast gain for bandwidth

Fig 8

Voltage-dependent K+ conductances reduce contrast gain and increase contrast-gain-bandwidth product (cGBWP).

(a) Contrast gain of the active photoreceptors (solid line) compared to the contrast gain of passive photoreceptors with the same resistance, depolarising leak conductance and capacitance (dotted line). Photoreceptors depolarised by light-induced current (LiC) to steady-state values of membrane potential indicated by coloured points in (b). Contrast gain for the completely dark adapted photoreceptor does not appear in the log-log plot as it is 0 mV. (b) cGBWP of the active photoreceptors (solid line) compared to the cGBWP of passive photoreceptors with the same resistance, depolarising leak conductance and capacitance (coloured points joined with dashed line).

Fig 8

doi: https://doi.org/10.1371/journal.pcbi.1006566.g008