CONNECTION BETWEEN SYNCHRONIZATION OF OSCILLATORY ACTIVITIES AT EARLYSTAGES AND A FINAL STAGE IN THE VISUAL-SYSTEM

Singer's group and we found synchronized oscillatory responses at earl y stages and at a final stage in visual processing, respectively. Howe ver, the former occurs on a millisecond time scale and the latter on a second time scale. We have considered that this results from a differ ence in scale of something which takes part in the oscillations. From this viewpoint, here we first find suppression effects on both figure and ground of a pattern and on only the ground in a binocular-rivalry situation and then examine, using the effects of two steps, what oscil lates and synchronizes at the last stage for form. Finally, we conclud e that the synchronous neuronal oscillations depend on firing patterns of neurons at early stages in the visual system and the psychophysica l ones on configurations of the spread effect of strength of pattern i nvolved closely in whole processing of the visual system and the latte r originates in the former.