Fig. 4. Comparison of sustaining fiber and dimming fiber dynamic responses. (A) Sustaining fiber response to polarizer rotation. Note the approach of the membrane potential to the resting potential (0 mV on the ordinate) as approaches 90° (arrowhead). (B) Dimming fiber response to polarizer rotation. Note the hyperpolarizing inhibitory postsynaptic potentials (arrows) as the e-vector approaches the vertical.

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