Studies On The Corpus Callosum Iii A Contribution To The Study Of Dyspraxia And Apraxia Following Partial And Complete Section Of The Corpus Callosum

On the basis of the concept of a unilateral cerebral dominance in man, Liepmann1postulated that in right-handed persons the left hemisphere, by means of the corpus callosum, exercises a dominating influence on the right hemisphere. Liepmann and Maas2concluded that involvement of the anterior portion of the corpus callosum produced sympathetic dyspraxia in the subordinate hand. According to Lange,3apraxia or dyspraxia occurs most consistently after lesions of the corpus callosum or the gyrus supramarginalis of the dominant hemisphere. The studies of Baldy4and Critchley5on the syndrome of the anterior cerebral artery tend to substantiate the importance of the corpus callosum in the performance of purposeful and complex movements in the subordinate hand. Other investigators, such as Dandy,6Foerster,7Armitage and Meagher8and Barre and associates,9described cases of surgical section of the corpus callosum or destruction of this