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Case Reports in Neurological Medicine
Volume 2013 (2013), Article ID 406861, 5 pages
http://dx.doi.org/10.1155/2013/406861
Case Report

Saccadic Alterations in Severe Developmental Dyslexia

1Department of Ophthalmology, Institute for Maternal and Child Health, IRCCS “Burlo Garofolo”, Via dell’Istria 65/1, 34137 Trieste, Italy
2Department of Electronics (DEEI), University of Trieste, 34127 Trieste, Italy
3Scientific Institute IRCCS “Eugenio Medea”, 33100 Udine, Italy
4Department of Experimental and Clinical Medical Sciences, DISM, ICBN, University of Udine, 33100 Udine, Italy

Received 11 April 2013; Accepted 19 May 2013

Academic Editors: M. Moonis and Z. Siddiqi

Copyright © 2013 Stefano Pensiero et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Linked References

  1. H. D. Simons and J. D. Grisham, “Binocular anomalies and reading problems,” Journal of the American Optometric Association, vol. 58, no. 7, pp. 578–587, 1987. View at Google Scholar · View at Scopus
  2. G. F. Eden, J. F. Stein, H. M. Wood, and F. B. Wood, “Differences in eye movements and reading problems in dyslexic and normal children,” Vision Research, vol. 34, no. 10, pp. 1345–1358, 1994. View at Google Scholar · View at Scopus
  3. M. Biscaldi, S. Gezeck, and V. Stuhr, “Poor saccadic control correlates with dyslexia,” Neuropsychologia, vol. 36, no. 11, pp. 1189–1202, 1998. View at Publisher · View at Google Scholar · View at Scopus
  4. H. Sigmundsson, “Do visual processing deficits cause problem on response time task for dyslexics?” Brain and Cognition, vol. 58, no. 2, pp. 213–216, 2005. View at Publisher · View at Google Scholar · View at Scopus
  5. R. Ram-Tsur, M. Faust, A. Caspi, C. R. Gordon, and A. Z. Zivotofsky, “Evidence for ocular motor deficits in developmental dyslexia: application of the double-step paradigm,” Investigative Ophthalmology and Visual Science, vol. 47, no. 10, pp. 4401–4409, 2006. View at Publisher · View at Google Scholar · View at Scopus
  6. A. Galaburda and M. Livingstone, “Evidence for a magnocellular defect in developmental dyslexia,” Annals of the New York Academy of Sciences, vol. 682, pp. 70–82, 1993. View at Google Scholar · View at Scopus
  7. J. Stein and J. Talcott, “Impaired neuronal timing in developmental dyslexia—the magnocellular hypothesis,” Dyslexia, vol. 5, no. 2, pp. 59–77, 1999. View at Google Scholar · View at Scopus
  8. J. Stein, “The magnocellular theory of developmental dyslexia,” Dyslexia, vol. 7, no. 1, pp. 12–36, 2001. View at Publisher · View at Google Scholar · View at Scopus
  9. P. G. Overton, “Collicular dysfunction in attention deficit hyperactivity disorder,” Medical Hypotheses, vol. 70, no. 6, pp. 1121–1127, 2008. View at Publisher · View at Google Scholar · View at Scopus
  10. M. P. Bucci, N. Nassibi, C. Gerard, E. Bui-Quoc, and M. Seassau, “Immaturity of the oculomotor saccade and vergence interaction in dyslexic children: evidence from a reading and visual search study,” PLoS One, vol. 7, no. 3, Article ID e33458, 2012. View at Publisher · View at Google Scholar · View at Scopus
  11. F. Hutzler, M. Kronbichler, A. M. Jacobs, and H. Wimmer, “Perhaps correlational but not causal: no effect of dyslexic readers' magnocellular system on their eye movements during reading,” Neuropsychologia, vol. 44, no. 4, pp. 637–648, 2006. View at Publisher · View at Google Scholar · View at Scopus
  12. S. Amitay, G. Ben-Yehudah, K. Banai, and M. Ahissar, “Disabled readers suffer from visual and auditory impairments but not from a specific magnocellular deficit,” Brain, vol. 125, no. 10, pp. 2272–2285, 2002. View at Google Scholar · View at Scopus
  13. G. Ben-Yehudah and M. Ahissar, “Sequential spatial frequency discrimination is consistently impaired among adult dyslexics,” Vision Research, vol. 44, no. 10, pp. 1047–1063, 2004. View at Publisher · View at Google Scholar · View at Scopus
  14. A. van der Leij and V. H. P. van Daal, “Automatization aspects of dyslexia: speed limitations in word identification, sensitivity to increasing task demands, and orthographic compensation,” Journal of Learning Disabilities, vol. 32, no. 5, pp. 417–428, 1999. View at Google Scholar · View at Scopus
  15. R. I. Nicolson, A. J. Fawcett, and P. Dean, “Time estimation deficits in developmental dyslexia: evidence of cerebellar involvement,” Proceedings of the Royal Society B, vol. 259, no. 1354, pp. 43–47, 1995. View at Publisher · View at Google Scholar · View at Scopus
  16. D. L. Compton, J. C. DeFries, and R. K. Olson, “Are RAN- and phonological awareness-deficits additive in children with reading disabilities?” Dyslexia, vol. 7, no. 3, pp. 125–149, 2001. View at Publisher · View at Google Scholar · View at Scopus
  17. A. Fawcett and R. Nicolson, Dyslexia: The Role of the Cerebellum, Whurr, London, UK, 2001.
  18. G. T. Pavlidis, “Eye movements in dyslexia: their diagnostic significance,” Journal of Learning Disabilities, vol. 18, no. 1, pp. 42–50, 1985. View at Google Scholar · View at Scopus
  19. G. Stanley, G. A. Smith, and E. A. Howell, “Eye-movements and sequential tracking in dyslexic and control children,” The British Journal of Psychology, vol. 74, no. 2, pp. 181–187, 1983. View at Google Scholar · View at Scopus
  20. B. Brown, G. Haegerstrom Portnoy, A. J. Adams et al., “Predictive eye movements do not discriminate between dyslexic and control children,” Neuropsychologia, vol. 21, no. 2, pp. 121–128, 1983. View at Publisher · View at Google Scholar · View at Scopus
  21. R. K. Olson, B. W. Wise, F. Conners, J. P. Rack, and D. Fulker, “Specific deficits in component reading and language skills: genetic and environmental influences,” Journal of Learning Disabilities, vol. 22, no. 6, pp. 339–348, 1989. View at Google Scholar · View at Scopus
  22. J. Judge, M. Caravolas, and P. C. Knox, “Visual attention in adults with developmental dyslexia: evidence from manual reaction time and saccade latency,” Cognitive Neuropsychology, vol. 24, no. 3, pp. 260–278, 2007. View at Publisher · View at Google Scholar · View at Scopus
  23. M. P. Bucci, D. Brémond-Gignac, and Z. Kapoula, “Latency of saccades and vergence eye movements in dyslexic children,” Experimental Brain Research, vol. 188, no. 1, pp. 1–12, 2008. View at Publisher · View at Google Scholar · View at Scopus
  24. J. E. Raymond, N. A. Ogden, J. E. Fagan, and B. J. Kaplan, “Fixational instability and saccadic eye movements of dyslexic children with subtle cerebellar dysfunction,” American Journal of Optometry and Physiological Optics, vol. 65, no. 3, pp. 174–181, 1988. View at Google Scholar · View at Scopus
  25. P. C. Pierrot-Deseilligny, F. Gray, and P. Brunet, “Infarcts of both inferior parietal lobules with impairment of visually guided eye movements, peripheral visual inattention and optic ataxia,” Brain, vol. 109, no. 1, pp. 81–97, 1986. View at Google Scholar · View at Scopus
  26. G. C. Baylis, J. Driver, L. L. Baylis, and R. D. Rafal, “Reading of letters and words in a patient with Balint's syndrome,” Neuropsychologia, vol. 32, no. 10, pp. 1273–1286, 1994. View at Publisher · View at Google Scholar · View at Scopus
  27. D. I. Friedman, J. Jankovic, and J. A. McCrary III, “Neuro-ophthalmic findings in progressive supranuclear palsy,” Journal of Clinical Neuro-Ophthalmology, vol. 12, no. 2, pp. 104–109, 1992. View at Google Scholar · View at Scopus
  28. M. P. Bucci, D. Brémond-Gignac, and Z. Kapoula, “Poor binocular coordination of saccades in dyslexic children,” Graefe's Archive for Clinical and Experimental Ophthalmology, vol. 246, no. 3, pp. 417–428, 2008. View at Publisher · View at Google Scholar · View at Scopus
  29. R. J. Leigh and D. S. Zee, The Neurology of Eye Movements, University Press, Oxford, UK, 4th edition, 2006.