Visual callosal topography in the absence of retinal input

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State: Public
Version: Author's accepted manuscript
Serval ID
serval:BIB_C2835D8FB936
Type
Article: article from journal or magazin.
Collection
Publications
Institution
Title
Visual callosal topography in the absence of retinal input
Journal
Neuroimage
Author(s)
Bock A.S., Saenz M., Tungaraza R., Boynton G.M., Bridge H., Fine I.
ISSN
1053-8119 (Print)
1095-9572 (Electronic)
ISSN-L
1053-8119
Publication state
Published
Issued date
2013
Peer-reviewed
Oui
Volume
81
Pages
325-334
Language
english
Notes
Publication types: Article ; research-article Identifiant PubMed Central: PMC3742332
Abstract
Using probabilistic diffusion tractography, we examined the retinotopic organization of splenial callosal connections within early blind, anophthalmic, and control subjects. Early blind subjects experienced prenatal retinal "waves" of spontaneous activity similar to those of sighted subjects, and only lack postnatal visual experience. In anophthalmia, the eye is either absent or arrested at an early prenatal stage, depriving these subjects of both pre- and postnatal visual input. Therefore, comparing these two groups provides a way of separating the influence of pre- and postnatal retinal input on the organization of visual connections across hemispheres. We found that retinotopic mapping within the splenium was not measurably disrupted in early blind or anophthalmic subjects compared to visually normal controls. No significant differences in splenial volume were observed across groups. No significant differences in diffusivity were found between early blind subjects and sighted controls, though some differences in diffusivity were noted between anophthalmic subjects and controls. These results suggest that neither prenatal retinal activity nor postnatal visual experience plays a role in the large-scale topographic organization of visual callosal connections within the splenium.
Keywords
Anophthalmos/pathology, Blindness/pathology, Corpus Callosum/pathology, Retina/physiopathology, Visual Pathways/pathology
Pubmed
Web of science
Open Access
Yes
Create date
11/07/2016 10:04
Last modification date
20/08/2019 15:37
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