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From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies
Homonymous hemianopia (HH) is the most common cortical visual impairment leading to blindness in the contralateral hemifield. It is associated with many inconveniences and daily restrictions such as exploration and visual orientation difficulties. However, patients with HH can preserve the remarkabl...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2017
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5583595/ https://www.ncbi.nlm.nih.gov/pubmed/28912694 http://dx.doi.org/10.3389/fnsys.2017.00064 |
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author | Hadid, Vanessa Lepore, Franco |
author_facet | Hadid, Vanessa Lepore, Franco |
author_sort | Hadid, Vanessa |
collection | PubMed |
description | Homonymous hemianopia (HH) is the most common cortical visual impairment leading to blindness in the contralateral hemifield. It is associated with many inconveniences and daily restrictions such as exploration and visual orientation difficulties. However, patients with HH can preserve the remarkable ability to unconsciously perceive visual stimuli presented in their blindfield, a phenomenon known as blindsight. Unfortunately, the nature of this captivating residual ability is still misunderstood and the rehabilitation strategies in terms of visual training have been insufficiently exploited. This article discusses type I and type II blindsight in a neuronal framework of altered global workspace, resulting from inefficient perception, attention and conscious networks. To enhance synchronization and create global availability for residual abilities to reach visual consciousness, rehabilitation tools need to stimulate subcortical extrastriate pathways through V5/MT. Multisensory bottom-up compensation combined with top-down restitution training could target pre-existing and new neuronal mechanisms to recreate a framework for potential functionality. |
format | Online Article Text |
id | pubmed-5583595 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-55835952017-09-14 From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies Hadid, Vanessa Lepore, Franco Front Syst Neurosci Neuroscience Homonymous hemianopia (HH) is the most common cortical visual impairment leading to blindness in the contralateral hemifield. It is associated with many inconveniences and daily restrictions such as exploration and visual orientation difficulties. However, patients with HH can preserve the remarkable ability to unconsciously perceive visual stimuli presented in their blindfield, a phenomenon known as blindsight. Unfortunately, the nature of this captivating residual ability is still misunderstood and the rehabilitation strategies in terms of visual training have been insufficiently exploited. This article discusses type I and type II blindsight in a neuronal framework of altered global workspace, resulting from inefficient perception, attention and conscious networks. To enhance synchronization and create global availability for residual abilities to reach visual consciousness, rehabilitation tools need to stimulate subcortical extrastriate pathways through V5/MT. Multisensory bottom-up compensation combined with top-down restitution training could target pre-existing and new neuronal mechanisms to recreate a framework for potential functionality. Frontiers Media S.A. 2017-08-29 /pmc/articles/PMC5583595/ /pubmed/28912694 http://dx.doi.org/10.3389/fnsys.2017.00064 Text en Copyright © 2017 Hadid and Lepore. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience Hadid, Vanessa Lepore, Franco From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies |
title | From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies |
title_full | From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies |
title_fullStr | From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies |
title_full_unstemmed | From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies |
title_short | From Cortical Blindness to Conscious Visual Perception: Theories on Neuronal Networks and Visual Training Strategies |
title_sort | from cortical blindness to conscious visual perception: theories on neuronal networks and visual training strategies |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5583595/ https://www.ncbi.nlm.nih.gov/pubmed/28912694 http://dx.doi.org/10.3389/fnsys.2017.00064 |
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