The fovea regulates symmetrical development of the visual cortex.

The fovea regulates symmetrical development of the visual cortex. Research Abstract Details 

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The fovea regulates symmetrical development of the visual cortex. Abstract Text:

Magella M Neveu,Elisabeth von dem Hagen,Antony B Morland,Glen Jeffery,Magella M Neveu,Elisabeth von dem Hagen,Antony B Morland,Glen Jeffery,

The foveal region contains the highest cell density in the human retina; consequently a disproportionately large area of the visual cortex is dedicated to its representation. In aniridia and albinism the fovea does not develop, and the corresponding cortical representation shows a reduction in gray matter volume. In albinos there are chiasmatic irregularities in the hemispheric projections, which are not found in aniridics. Here, we ask whether the anomalies in central retinal development, present in albinism and aniridia, have a wider impact on the architecture of the visual cortex. The length, depth, and topology of the calcarine fissure is analyzed in albino, aniridic, and normal subjects. These measures are compared between groups and between the cortical hemispheres within each subject. We show that the calcarine fissure, where the primary visual cortex is represented, is abnormally short in those lacking a fovea. Moreover, surface reconstructions of the calcarine fissure revealed marked interhemispheric asymmetries. The two groups could not be distinguished on the basis of their cortical features, and we therefore interpret the abnormalities in cortical architecture in terms of the absence of the fovea, the common retinal feature found in both groups. J. Comp. Neurol. 506:791-800, 2008. (c) 2007 Wiley-Liss, Inc.

The fovea regulates symmetrical development of the visual cortex. Publishing Authors By Initials

MM Neveu,E von dem Hagen,AB Morland,G Jeffery,MM Neveu,E von dem Hagen,AB Morland,G Jeffery,

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The fovea regulates symmetrical development of the visual cortex. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: The Journal of comparative neurology

VOLUME: 506

Page Numbers: 791-800

Journal Abbreviation: J. Comp. Neurol.

ISSN: 0021-9967

DAY: 10

MONTH: Feb

YEAR: 2008

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LANGUAGE: eng

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AFFILIATION: Institute of Ophthalmology, University College London, London, United Kingdom.

Country: United States

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MEDLINETA: J Comp Neurol

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