title: A nonlinearity in the inhibitory interactions in the lateral eye of limulus.
abstract: Receptor units in the eye of the horseshoe crab are more sensitive to lateral inhibition at some levels of excitation than they are at others. As a result, the steady-state inhibition of the response of a given unit is not directly proportional to the response levels of neighboring units. This effect may be represented by the introduction of a nonlinearity in the Hartline-Ratliff system of equations. The nonlinear inhibitory effect appears to increase the operating range of the receptor units.
mesh_terms: D000818:Animals; D003386:Brachyura / Q000502:physiology*; D009433:Neural Inhibition; D009799:Ocular Physiological Phenomena; D010775:Photic Stimulation; D010786:Photoreceptor Cells / Q000502:physiology