Figure 7.
Isolated cone-mediated responses in ventral wild-type retina show fast temporal kinetics. A, LN models for a wild-type ON ganglion cell at three light levels. B, Fourier transform of the filters in A. The filter in the brightest condition was normalized with a peak of +1 (ON cells) or −1 (OFF cells) before scaling the other two conditions (after aligning the nonlinearities) and computing the Fourier transform. Other conventions are the same as in Figure 5. C, Zero-cross time at three levels of mean luminance across cells. D, Averaged Fourier transform of filters at three levels of mean luminance across cells. E–H, Same as A–D after bleaching with a green light stimulus sufficient to bleach the rod-mediated response in a Gnat2cpfl3 retina (see Results). Blue points in G show the zero-cross times from the control condition in C.