title: Facilitatory interactions between flashed lines.
abstract: The detectability of pairs of flashed lines was investigated as a joint function of their separation in both space and time. In contrast to previous studies of contrast interactions as a function of either spatial or temporal separation alone, the predominant interaction is not lateral inhibition, but a delayed facilitation. A quantitative model based on probability summation between lateral-inhibitory detectors does not appear able to account for these results. Two related explanations are suggested: either a motion detection system or the nonlinear 'transient' subsystem is being tapped.
mesh_terms: D006801:Humans; D008959:Models, Neurological; D009039:Motion Perception / Q000502:physiology; D009433:Neural Inhibition; D010775:Photic Stimulation; D011336:Probability; D012160:Retina / Q000502:physiology; D012684:Sensory Thresholds / Q000502:physiology; D013028:Space Perception / Q000502:physiology; D013997:Time Factors; D014794:Visual Fields; D014796:Visual Perception / Q000502:physiology*