Nonlinear analysis of cat retinal ganglion cells in the frequency domain.
We have analyzed the responses of cat retinal ganglion cells to luminosity gratings that are modulated in time by a sum of sinusoids. A judicious choice of the component temporal frequencies permits a separation of the linear and second-order nonlinear components. Y cell responses show harmonic generation and intermodulation distortion over a wide frequency range. These nonlinear components predominate over the linear components for certain types of spatial stimuli. Nonlinear components in X cells are greatly diminished in comparison. The character of the nonlinear responses provides strong constraints on prospective models for the nonlinear pathway of the Y cell.
D000200:Action Potentials; D000818:Animals; D002415:Cats; D005724:Ganglia / Q000502:physiology; D009415:Nerve Net / Q000502:physiology; D012160:Retina / Q000502:physiology*; D013997:Time Factors; D014785:Vision, Ocular; D014795:Visual Pathways / Q000502:physiology*
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