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July 1959

Localization of Function in the Corpus Callosum: Visual Gnostic Transfer

Author Affiliations

Washington, D. C.
From the Division of Biology, California Institute of Technology.
Now at the Walter Reed Army Institute of Research, Walter Reed Army Medical Center, Washington, D. C.

AMA Arch Neurol. 1959;1(1):74-77. doi:10.1001/archneur.1959.03840010076009

The fibers of the corpus callosum have been described, in general, as coursing with greatest density between homologous cortical loci.1.2,5,9 Such prominence of homologous fibers in the corpus callosum suggests a functional parcellation within this structure, mirroring, at least in some degree, that found over the related cortical surfaces. However, experimental evidence bearing on functional localization within the corpus callosum has remained sparse.

Physiological studies on the corpus callosum have yielded some data suggestive of functional differentiation within this structure. Electrical stimulation of the commissure caudal to the genu in anesthetized animals has resulted in movements of body parts, the parts involved being dependent on the exact locus of stimulation. Further, stimulation at many other points along the corpus callosum has failed to bring about such motor response.6,10

No reports have been published of current application to the corpus callosum in the conscious human, and hence no inference

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