Fig. 5: Nonlinear chromatic integration is reduced under grating stimulation.
From: Linear and nonlinear chromatic integration in the mouse retina
a Four sample gratings of the chromatic grating stimulus, showing the green and UV sinusoids in anti-phase. Below each grating, the contrast over a spatial period is shown for each stimulus frame. b Schematic view of all contrast combinations used for the chromatic grating stimulus, displayed over one spatial period. c PSTHs over one temporal period for a linear, a nonlinear Off, and a nonlinear On cell in response to the chromatic grating stimulus. The corresponding contrast combinations are depicted to the right. d Chromatic-integration curves of the cells shown in c, measured with the spatially homogeneous chromatic-integration stimulus. Shaded regions around the curves show mean ± SEM. e Amplitudes of first (F1) and second (F2) harmonic of the sample cells, obtained from the PSTHs shown in c. f Distribution of the grating nonlinearity index for chromatically linear (n = 1232) as well as nonlinear Off (n = 236), nonlinear On (n = 87), and nonlinear On–Off (n = 406) cells, with the classification obtained from the spatially homogeneous chromatic-integration stimulus.
