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. Author manuscript; available in PMC: 2010 Nov 24.
Published in final edited form as: Vis Neurosci. 2010 Apr 15;27(1-2):1–8. doi: 10.1017/S0952523810000076

Fig. 4.

Fig. 4

Compensation for nonlinearities mediated by crossover inhibition. Scheme for signal flow of crossover inhibition at a generalized synapse in the retina. (A and B) Voltage responses in ON and OFF presynaptic cells to a bright step of light. (C) Excitatory currents generated in the postsynaptic ON cells showing rectification where presynaptic depolarization elicits a large inward current, while presynaptic hyperpolarization elicits a smaller outward current. (D) Excitatory currents generated in a postsynaptic OFF cell. (E) Crossover current to an ON postsynaptic cell derived from the OFF pathway carried by an OFF amacrine cell (blue arrow). (F) Crossover current to an OFF postsynaptic cell. (G) Voltage in an ON postsynaptic cell generated by the addition of ON excitation and OFF crossover inhibition. (H) Postsynaptic voltage in an OFF postsynaptic cell generated by OFF excitation and ON crossover inhibition.