Anticipation of moving stimuli by the retina

Neural activity in the brain is evoked by a flash of light. There is a delay of 30-100 milliseconds due to slow process of visual transduction in photoreceptors. It is suggested that the visual cortex uses delayed visual data from the eye to determine the trajectory of a moving object. Such anticipation of moving stimuli is reported to begin in the retina. A moving bar was found to cause a moving wave of spiking activity in retinal ganglion cells. The population activity travelled closed to the leading edge of the moving bar.