Figure 10.

Inhibitory input regulates On parasol cell responses to split-field sinusoidal stimuli. A, Example voltage responses to dynamic clamp injection of conductances elicited by a 100% contrast split-field sinusoidal stimulus. Top, Response with both excitatory and inhibitory conductances. Bottom, Response with excitatory conductance alone. B, Average firing rate for conductances corresponding to one cycle of stimulus from the same cell as in A. C, Mean firing rate with and without inhibitory conductance. Data from the same experiment using full-field conductances from Figure 5 is replotted for comparison. Error bars are SEM across 10–25 dynamic clamp trials. D, Duty cycle (see Materials and Methods) with and without inhibitory conductance.