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Annals of Dyslexia

, Volume 46, Issue 1, pp 259–283 | Cite as

Impaired performance of children with dyslexia on a range of cerebellar tasks

  • Angela J. Fawcett
  • Roderick I. Nicolson
  • Paul Dean
Part III Cognitive And Neurological Factors In Dyslexia

Abstract

It is now thought that the cerebellum is involved in the acquisition of “language dexterity” in addition to its established role in motor skill acquisition and execution. Mild cerebellar impairment, therefore, provides a possible explanation of a range of problems shown by children with dyslexia. The authors have established suggestive evidence in support of this hypothesis in tests of balance and of time estimation. In a further test of the hypothesis, a battery of clinical tests for cerebellar impairment, including tests of muscle tone and of coordination, was administered to matched groups of children with dyslexia and control children aged 10, 14, and 18 years (55 subjects in all). The children with dyslexia showed highly significant impairments on all the cerebellar tests, and significant impairment compared even with reading age controls on 11 of the 14 tasks. Deficits on the majority of tests were among the largest found in our research program. The findings, therefore, provide further intriguing evidence of cerebellar impairment in dyslexia. We speculate that the well-established phonological deficits in dyslexia may arise initially from inefficient articulatory control attributable to cerebellar impairment.

Keywords

Motor Skill Phonological Awareness Dyslexia Developmental Dyslexia Dyslexic Child 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© The Orton Dyslexia Society 1996

Authors and Affiliations

  • Angela J. Fawcett
    • 1
  • Roderick I. Nicolson
    • 1
  • Paul Dean
    • 1
  1. 1.University of SheffieldUnited Kingdom

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