Nonlinear-linear transition in the frog intraretinal electroretinogram

The electroretinographic system is stimulated with sinusoidal light signals at various frequencies. Such steady state responses indicate that the system contains two frequency ranges a low frequency nonlinear range and a higher frequency essentially linear range. The transitional frequency range is from about 3–5 c/s. Reduction of stimulus amplitude at low frequency does not indicate any significant linearization.