Perception of spatial relationships by the right and left hemispheres in commissurotomized man

Abstract

Square arrays of dots organized by differential spacing into rows or columns were tachistoscopically presented in the right or left visual half-field of human commissurotomy patients, who signalled the orientation of the lines of dots by means of a finger movement. All patients were significantly more accurate on displays in the left half-field than on those in the right, suggesting that in man the right hemisphere is more competent than the left in perceiving the overall stimulus configuration inherent in the spatial organisation of its parts.