Role of the right and left hemispheres in location of objects in the binocular visual field

Using a modified method of perimetry, peculiarities of location of objects in the visual field were studied after inhibition of one of the hemispheres (produced by treatment with the right- or left-sided electrical seizures) as well as in the cases of focal lesions of the right and left hemispheres. After the inhibition of either hemisphere, the precision of the object location in the hemifield contralateral to the affected side was decreased. In the ipsilateral hemifield, an increased precision of location and the appearance of erroneous shifts of objects towards the edge of the visual field were revealed. In the case of the inhibited (or locally lesioned) right hemisphere, as compared to the left one, the discrimination of objects in the visual field was affected to the greater extent. The role of anterior and posterior areas of the right and left hemispheres in formation of a the integral image of the visual field is discussed.