[Restoration of the behavioral reactions of Rana esculenta frogs during regeneration of visual nerve fibers].

After sectioning the optic nerve, various forms of visually guided behaviour in the frog R. esculenta recover unevenly. Within 16--20 days, the onset of reactions was observed which are associated with perception of relatively large unmoving objects during active locomotion of animals (1); within 55 days -- avoidance reactions (2); within 90 days -- feeling reactions (3) were formed. In electrophysiological experiments it was shown that axons of the ganglionic retinal cells from various classes form contacts with the tectum also at different periods. The data obtained confirm the significance of specialized "canalization" of the retino--central nervous systems of transmission and evaluation of visual information for organization of separate forms of visually monitored behaviour in frogs.