The SAGE Handbook of Dyslexia is a comprehensive overview of a complex field. It is a rich, critical assessment of past and present theory and current research, which also looks to the future. The editors have brought together key figures from the international academic world - both researchers and practitioners - to examine the relationships between theoretical paradigms, research and practice, and to map new areas of research.

The Neurobiological Basis of Dyslexia

The Neurobiological Basis of Dyslexia

The neurobiological basis of dyslexia

This chapter outlines

  • genetic, sensory, motor and psychological evidence that dyslexia is a neurological syndrome affecting the development of the brain;
  • the important role of visual processing for reading;
  • the role of magnocellular neurones, timing events, for controlling the focus of visual and auditory attention together with eye and speech movements;
  • evidence that the development of magnocellular neurones is impaired in dyslexia; and
  • implications as to the remediation of dyslexics’ reading problems.


Developmental dyslexia (a reading level far below that expected from a person's general intelligence) is very common, because reading is so difficult. Our large brain seems to endow us genetically with an ‘instinct’ to learn to speak. So speaking is relatively easy. On a very ...

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