2011 Fiscal Year Final Research Report
A cognitive neuropsychological investigation applied to Japanese patients with semantic dementia
| Project/Area Number |
21500260
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Cognitive science
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| Research Institution | Ehime University |
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Principal Investigator |
KOMORI Kenjiro 愛媛大学, 大学院・医学系研究科, 講師 (30294789)
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| Co-Investigator(Kenkyū-buntansha) |
FUKUHARA Ryuji 愛媛大学, 医学部附属病院, 講師 (60346682)
ISHIKAWA Tomohisa 愛媛大学, 医学部附属病院, 助教 (60419512)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 脳認知科学 / 意味記憶 / 意味性認知症 / 表層性失読 / 語義失語 / 典型性効果 / 頻度効果 |
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| Research Abstract |
Semantic dementia(SD) is a selective deterioration in semantic memory associated with bilateral focal atrophy of the temporal lobes. The hypothesis that accuracy of the pronunciations of written words, particularly less familiar words with an atypical spelling-sound relationship, relies in part on knowledge of the meanings of the word. It has already been supported by reports of surface dyslexia in large case-series studies of English-speaking/reading patients with SD. We studied the reading performance of a larger sample of Japanese-speaking SD patients with different degrees of semantic deterioration. Ten SD patients were administered their reading performances with120 two-character kanji words, with 20 words in each of the six conditions formed by crossing three bands of consistency with two bands of word frequency. The pattern of the performance of oral reading kanji in Japanese speaking SD patients showed complete surface dyslexia.
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