Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case
We hypothesize that the high quality of binocular coordination of saccades in reading is progressively learned during childhood, and this oculomotor learning is based on a synergy between saccades and vergence. In present work deficits in the binocular control of saccades in six dyslexic children (m...
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MDPI AG
2013-04-01
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| Series: | Journal of Eye Movement Research |
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| Online Access: | https://bop.unibe.ch/JEMR/article/view/2353 |
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| author | Elham Ghassemi Zoë Kapoula |
| author_facet | Elham Ghassemi Zoë Kapoula |
| author_sort | Elham Ghassemi |
| collection | DOAJ |
| description | We hypothesize that the high quality of binocular coordination of saccades in reading is progressively learned during childhood, and this oculomotor learning is based on a synergy between saccades and vergence. In present work deficits in the binocular control of saccades in six dyslexic children (mean age was 11±2.48 years) are studied for two tasks (text reading and Xs-C scanning), and at two viewing distances (40 cm and 100 cm). Fixation durations resulting are longer in Xs-C scanning task than in text reading task. We postulate that while reading motor preparation processes are executed with less demand for attentional resources. Importantly all physiological parameters of the saccades were the same for the two conditions and in either distance. Namely disconjugacy of saccades and disconjugate post-saccadic drifts were high but similar for the two conditions. Time analysis applied on saccade amplitude disconjugacy, on disconjugate post-saccadic drift and on fixation duration showed no significant effect of repetition or time. we believe that the binocular coordination deficits in dyslexic children reflect some type of microdyspraxia due to reduced oculomotor learning, perhaps related to inefficiency of the magnocellular visual system and the cerebellar functions. |
| format | Article |
| id | doaj-art-7ab7dbbd79a94b66b4ec6b16c7fdf2af |
| institution | Kabale University |
| issn | 1995-8692 |
| language | English |
| publishDate | 2013-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Eye Movement Research |
| spelling | doaj-art-7ab7dbbd79a94b66b4ec6b16c7fdf2af2025-08-20T03:35:41ZengMDPI AGJournal of Eye Movement Research1995-86922013-04-016110.16910/jemr.6.1.5Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study caseElham Ghassemi0Zoë Kapoula1IRIS Group, Centre d’Études de la Sensori-Motricité, UMR 8194, CNRS, Université Paris Descartes, Paris, FranceIRIS Group, Centre d’Études de la Sensori-Motricité, CNRS, Hôpital Européen Georges Pompidou, Paris, FranceWe hypothesize that the high quality of binocular coordination of saccades in reading is progressively learned during childhood, and this oculomotor learning is based on a synergy between saccades and vergence. In present work deficits in the binocular control of saccades in six dyslexic children (mean age was 11±2.48 years) are studied for two tasks (text reading and Xs-C scanning), and at two viewing distances (40 cm and 100 cm). Fixation durations resulting are longer in Xs-C scanning task than in text reading task. We postulate that while reading motor preparation processes are executed with less demand for attentional resources. Importantly all physiological parameters of the saccades were the same for the two conditions and in either distance. Namely disconjugacy of saccades and disconjugate post-saccadic drifts were high but similar for the two conditions. Time analysis applied on saccade amplitude disconjugacy, on disconjugate post-saccadic drift and on fixation duration showed no significant effect of repetition or time. we believe that the binocular coordination deficits in dyslexic children reflect some type of microdyspraxia due to reduced oculomotor learning, perhaps related to inefficiency of the magnocellular visual system and the cerebellar functions.https://bop.unibe.ch/JEMR/article/view/2353binocular coordinationdevelopmental dyslexiacerebellum |
| spellingShingle | Elham Ghassemi Zoë Kapoula Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case Journal of Eye Movement Research binocular coordination developmental dyslexia cerebellum |
| title | Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case |
| title_full | Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case |
| title_fullStr | Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case |
| title_full_unstemmed | Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case |
| title_short | Is poor coordination of saccades in dyslexics a consequence of reading difficulties? A study case |
| title_sort | is poor coordination of saccades in dyslexics a consequence of reading difficulties a study case |
| topic | binocular coordination developmental dyslexia cerebellum |
| url | https://bop.unibe.ch/JEMR/article/view/2353 |
| work_keys_str_mv | AT elhamghassemi ispoorcoordinationofsaccadesindyslexicsaconsequenceofreadingdifficultiesastudycase AT zoekapoula ispoorcoordinationofsaccadesindyslexicsaconsequenceofreadingdifficultiesastudycase |