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Review: Activation of the primary visual cortex by Braille reading in blind subjects

Review: Activation of the primary visual cortex by Braille reading in blind subjects. By : Igal Sterin. Basis For Research. Animal Studies linking connections Prior finding among sighted subjects on tactile discrimination tasks Activation of Visual Cortex in blind subjects. Method.

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Review: Activation of the primary visual cortex by Braille reading in blind subjects

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  1. Review: Activation of the primary visual cortex by Braille reading in blind subjects By : IgalSterin

  2. Basis For Research Animal Studies linking connections Prior finding among sighted subjects on tactile discrimination tasks Activation of Visual Cortex in blind subjects

  3. Method Proficient Braille readers two tasks Word Task Non-word task Sighted and Blind Subjects for comparison 3 tasks Sweep (non-discriminatory) Angle Width Character 

  4. Results From the Word and Non-word tasks activation of medial occipital lobe and extrastriate cortices bilaterally Non-Braille discrimination tasks  Primary Visual cortex activated less strongly than Braille tasks visual cortex decrease in regional cerebral blood flow in sighted subjects Non-discrimination task did not activate visual cortex in either blind or sighted subjects

  5. Discussion Main Finding: Visual cortex capable of reorganizing to accept non-visual sensorimotor information Braille reading may enhance this plasticity plasticity found in animal research Cat Monkey Implication for Selective attention     Blind vs. Sighted

  6. Limitations Number of participants Confined to particular brain area PET scan limitations

  7. Opinion Organization of paper unique Plainly laid out but rushed Very interesting and understandable Future direction

  8. Cited Article Sadato et al., 1996. Activation of the primary visual cortex by Braille reading in blind subjects. Nature 380(6574): 526-8.

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