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Delphine Lvy-Bencheton, Denis Plisson, Myriam Prost, Sophie Jacquin-courtois, Henry Gabrielle, Roméo Salemme, Laure Pisella, Caroline Tilikete; Saccadic adaptation for rehabilitation in hemianopic patients. Journal of Vision 2012;12(14):41. doi: 10.1167/12.14.41.
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Hemianopia leads to severe impairment in daily life activities requiring visual perception. Some rehabilitation methods based on voluntary saccadic training (top-down strategy) give efficient functional effects by improving reading or visual exploration times1,2,3. However, these methods require assiduity and material constraint which limit their use in routine rehabilitation. Automatic and unconscious training based on low level mechanisms (bottom-up strategy) with a lower amount of time of training open the way to new rehabilitation methods4. Our goal was to develop a new saccadic training based on low level plasticity mechanisms, using anti-saccade adaptation in order to increase saccadic amplitude5 toward the blind hemifield. Thirteen hemianopic patients, following stroke that occurred at least 6 months earlier, were submitted randomly to a 30 mn anti-saccade adaptation session and two control sessions, separated by 4 or 5 weeks. Pre and post tests consisted in a questionnaire of visual abilities and quality of life (NEI-VFQ 25), a reading task and two different visual exploration tasks (pop-out and serial), in order to explore the functional effects of saccadic adaptation. Saccadic adaptation was not significant in the overall group but we selected 7 patients that demonstrated significant adaptation, without any saccadic change on the control sessions. In this subgroup of adapted patients, we found a functional effect of the adaptation session only on reading time and reaction time during serial visual exploration task. These results emphasize the fact that saccadic adaptation may be an efficient and costless tool to compensate for hemianopia deficits in some patients.
Meeting abstract presented at OSA Fall Vision 2012
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