Figure 5.
Solid versus counter-flickering stimulus/response. Solid stimuli yielded signals of greater magnitude than counter-flickering stimuli. Negative intrinsic signals were measured at several ROIs. The averaged time course was 20 trials for each stimulus condition: counter flickering and solid. Solid stimuli (solid plotted line) consistently yielded signals greater than counter-flickering stimuli (dashed plotted line). This finding is inconsistent with a dominant signal source from the ganglion cell layer, which exhibits center-surround receptive fields that are spatially and temporally tuned. Error bars signify ± 1 SEM.