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HUMAN SPLIT-BRAIN SYNDROMES*Until about 1940 callosal syndromes were widely accepted among neurologists. The rejection of such syndromes followed negative reports from physiologists on callosal section in animals and particularly the negative reports by Akelaitis on human callosal section. Recently, however, Sperry and his co-workers have proved that by means of new technics of examination, dramatic results can be shown to follow such sections. This work aroused the interest of the author in the possibility of human hemispheric deconnection syndromes. The paper presented evidence that pure word blindness without agraphia results from a lesion of the left visual cortex and

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