Investigation of the Processes Involved in Improvement of Pure Alexia:Kinesthetic Facilitation Reading and Reading the Clues to Imageability

DOI 4 References
  • Morioka Etsuko
    Department of Rehabilitation Science, Faculty of Allied Health Sciences, Osaka Health Science University.
  • Kanai Takanori
    Department of Clinical Services, Kokura Rehabilitation Hospital
  • Takahashi Shusuke
    Department of Physical Therapy, Takarazuka University of Medical and Health Care

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  • 純粋失読における改善経路の検討 ─運動覚性記憶を用いる読みと心像性を手がかりとする読みについて─

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Abstract

The purpose of this study was to examine the neural processes involved in the improvement of pure alexia. The patient was a 35-year-old right-handed woman with a junior college education, who showed pure alexia following excision of an arteriovenous malformation in the left occipital lobe. Auditory comprehension, spontaneous speech, and spontaneous writing of Kana were, however, all preserved. MRI revealed lesions around the medial side of the lateral occipital lobe in the left hemisphere, including the lingualis gyrus, the fusiform gyrus, and the splenium of the corpus callosum. A reading test was conducted twice, at 6 and 15 months after admission. The results of the first test showed that the stroke count effect was confirmed with response rate, suggesting the effects of kinesthetic memory associated with kinesthetic facilitation reading. The results of the second test showed that imageability influenced semantic processing, indicating the effects of semantics. These findings suggest that there might be two types of processes involved in the improvement of pure alexia:the compensatory kinesthetic facilitate route mediated by motor imagery for letters；and the activated semantics route mediated by imageability.

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