Projection of the visual vertical meridian to cerebral cortex of the cat.

Publisher Website
Google Scholar
Abstract
The projection of the visual vertical meridian to the occipital lobe of the cat was investigated by mapping receptive fields of single units isolated from the cerebral cortex of both cerebral hemispheres of one animal. The region of central vision was investigated and also 10 degrees of meridian into the upper and lower visual fields. A strip of bilaterally represented visual field was found. The edges of large receptive fields overlap further than the edges of small fields. The overlap of the centers of receptive fields was not related to field size. Field centers did not lie more than 1/2-1[degree] into the ipsilateral hemifield. The overlap was the same in area 17 and in area 18. The overlap could be accounted for by the size of retinal ganglion cell fields and the manner of decussa-tion of optic nerve fibers at the optic chiasm. The overlap was present after section of the corpus callosum.