TB7 B&B Lecture 4; Written Language 2

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  • Created on: 21-12-15 15:16
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  • TB7 BB Lecture 4; Written language 2
    • Beyond the vwfa; dorsal and ventral routes
      • Dorsal reading routes
        • Connects the vwfa to PHONO-LOGICAL areas concerned with...
          • Auditory-phonological processing = Superior medial and posterior temporal regions
          • Speech-motor processing = Left inferior frontal gyrus and speech-motor cortex
            • Wheat et al (2010); Fast access from print to phonology, left IFG responded within 200ms of word-presentation with MEG
        • Dorsal routes for reading are SHARED with those for repeating spoken words!
      • Ventral reading routes
        • Connects the vwfa to SEMANTIC areas
          • To areas in the left ANTERIOR temporal lobe, along the inferior part of the temporal lobe
    • CENTRAL Acquired Dyslexias
      • Surface
        • Meaning
          • VENTRAL route damage
      • Phonological
        • Sound
          • DORSAL route damage
      • Deep
        • Meaning AND sound
          • BOTH routes damaged
      • Perception of written words is ACCURATE
      • Accessing semantics and/ or phonology DAMAGED
    • Central Dysgraphias
      • Stages of planning
      • Deep dysgraphia is often comorbid with deep dyslexia etc.
      • Inability to spell INVERTED NON-words
      • SEMANTIC errors in spelling
    • Peripheral dysgraphias
      • Impaired spelling and/ or writing
      • Intact spoken language and sometimes reading
      • Graphemic Buffer disorder
        • Issues with retention and control of ABSTRACT letter represent-ations
          • Affects all forms of OUTPUT
      • Afferent Dysgraphia
        • Problems in the USE OF FEEDBACK to control graphomotor patterns

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