Y-Like Retinal Ganglion Cells Innervate the Dorsal Raphe Nucleus in the Mongolian Gerbil (Meriones unguiculatus)
Figure 3
Physiological response properties of the DRN-projecting RGCs.
(A) the visual response of an ON center Y-cell, (B) receptive field, and (C), dendritic morphology; the arrow reveals axon, (D) spatial frequency tuning of a Y-cell. Note the cell's response reached peak at 0.07 c/d. 3E presents the peristimulus-time histograms of the cell's responses to contrast reversal sinusoidal gratings (spatial frequency: 0.07 cyc/deg, temporal frequency: 2 Hz, contrast: 100%). The numbers to the left of the histograms depict spatial phases. This cell had frequency doubling at two spatial phases, 0° and 180°, respectively. 2F illustrates that, after fast Fourier transformation, the fundamental component (F1) is represented by triangular symbols (Δ) while the second harmonic (F2) is shown with open circular symbols (o).