CALLOSAL TERMINATIONS ALONG BOUNDARY BETWEEN VISUAL AREAS I AND 2 IN RABBIT

The distribution of the terminals of the corpus callosum within the visual areas of the rabbit were studied by removing the occipital cortex on one side and looking for Nauta degeneration in the other hemisphere. The degeneration was found as a narrow band running rostrocaudally over the occipital cortex. In other rabbits an electrophysiological map of the visual field was produced by recording, with tungsten electrodes, the response to a small flash of light. The map consisted of 2 visual area I medial to visual area II. When these maps of the visual field were compared with the distribution of the callosal degeneration, it was found that the band of degeneration coincided with the junction between the 2 visual areas. The significance of these results is discussed. © 1969.