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The topography and variability of the primary visual cortex in man

Suzanne S. Stensaas Neuroprostheses Program, Institute for Biomedical Engineering, University of Utah, Salt Lake City, Utah

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Donald K. Eddington Neuroprostheses Program, Institute for Biomedical Engineering, University of Utah, Salt Lake City, Utah

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William H. Dobelle Neuroprostheses Program, Institute for Biomedical Engineering, University of Utah, Salt Lake City, Utah

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Page Range:
747–755
Volume/Issue:
Volume 40: Issue 6
DOI link:
https://doi.org/10.3171/jns.1974.40.6.0747
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✓ The topographical anatomy of the primary visual cortex in man was studied by macroscopic identification and measurement of the line of Gennari on coronal sections from 52 hemispheres collected at autopsy. Computer analysis of these data provided detailed, quantitative information concerning the amount, variability, and distribution of the striate area on the surface of the occipital lobe, and within the calcarine fissure and other sulci. This information is particularly applicable to the development of a functional visual prosthesis for the blind based on stimulation of the visual cortex. Taking conservative values for two-point discrimination (3 mm) on the cortex based on previous observations made during neurosurgical operations, and the surgically accessible areas available for stimulation reported in this study, it seems clear that a useful number of electrodes could be implanted in virtually every patient.

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Contributor Notes

Address reprint requests to: S. S. Stensaas M.A., Neuroprostheses Program, Institute for Biomedical Engineering, University of Utah, 19 East Oakland Avenue, Salt Lake City, Utah 84115.
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