[Image description at the level of the external geniculate body].

The responses of the receptive fields of the cat lateral geniculate body were investigated with a different position of the light stimuli in the receptive field. The stimuli were of the cross shape. On the basis of the obtained data the relief of excitation of the overlapping receptive fields was reconstructed. It is shown that at the level of the lateral geniculate body there exist a copy of the light stimuli. The description of the image is formed as a relief of excitation which changes in time. The magnitude of the excitation depends on the contrast of the stimuli.