Based On Brain Mechanisms Of Binocular Rivalry

Binocular rivalry is a form of multistable perception that occurs when each of the two eyes is presented with visual stimuli that are different from each other and cannot be fused into a single coherent percept. Under these circumstances, the percept typically alternates between two states corresponding to the left eye's stimulus and the right eye's stimulis or between two gestalts that are formed by combining parts of the monocular stimuli. The percepts generated by rivalrous stimuli provide insight into the nature of the representations of these stimuli. Therefore, in addition to being a fascinating phenomenon in its own right, binocular rivalry can be used to study mechanisms of perceptual selection and suppression.One remarkable character of binocular rivalry is that the physical stimuli remain but the perception changes. And the ERPs happen when the stimuli is presented or retracted. So this paper studies the ERPs of binocular rivalry by setting a new stimuli pattern. The stimuli pattern is that testees were presented with a monocular stimuli (testees were presented with a left-eye stimuli in this paper), and then changed into a rivalrous stimuli. The ERPs were recorded synchronously. In order to explain the ERPs elicited not only by the stimulus change but also by the perceptual state of the observers, this paper set another three antitheses patterns, with stimulus change from monocular stimuli to other three non-rivalrous stimuli.We obtain the results as follows by processing and analyzing the ERPs datas:1. The amplitude of N2 component elicited by rivalrous stimuli was stronger than non-rivalrous stimuli(p<0.01). This result is similar to the previous study, but the latency of N2 component in this paper was about 40ms earlier than the previous study.2. The latency of P300 component (250ms-400ms) elicited by rivalrous stimuli was later than control experiment 1 (p<0.01), the reason of this result maybe that the perception changed in rivalrous stimuli experiment and didn't change in control experiment 1. And the amplitude of P300 component elicited by rivalrous stimuli was stronger than control experiment 2,3 (p<0.01).