A Case Report of Dystypia with Impaired Roman Letter Writing

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  • Karasawa Kenta
    Department of Rehabilitation, Rehabilitation Amakusa Hospital.
  • Haruhara Noriko
    Department of Speech, Language and Therapy, Faculty of Health Sciences, Mejiro University

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  • ローマ字書字の成績低下を呈したタイピング障害の一例

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<p>  We examined a 45-year-old right-handed man whose major complaint was that his typing speed had reduced after a left thalamic hemorrhage. He did not show any symptoms of aphasia, apraxia, or agnosia. His general intellectual functioning was normal, apart from a decrease in his processing speed. We conducted assessments of his phonological manipulation, writing, and typing abilities two months after the onset. When entering Japanese into PC, we need to convert Japanese phonetics to kana letters and kana letters to Roman letters, however the process varies depending on the proficiency of Roman letter writing and typing. These assessments showed that his performance on the phonological manipulation, dictation of kana, and conversion of kana characters to Roman letter was better than that of Roman letter dictation. He had a tendency to make mistakes in oral reading of Roman letters. Due to retardation of bidirectional processing process between phonological representation and Roman letters representation, mild typing impairment was observed. The fact that his typing ability was better than his Roman letter writing might be due to preserved procedural memory that he was able to use when converting phonological representations directly to kinetic engrams.</p>

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