A Functional MRI Study on the Japanese Orthographies
Modulation of the Visual Word Retrieval System in Writing: A Functional MRI Study on the Japanese Orthographies Kimihiro Nakamura1, Manabu Honda2, Shigeru Hirano1, Tatsuhide Oga1, Nobukatsu Sawamoto1, Takashi Hanakawa1, Downloaded from http://mitprc.silverchair.com/jocn/article-pdf/14/1/104/1757408/089892902317205366.pdf by guest on 18 May 2021 Hiroshi Inoue3, Jin Ito3, Tetsu Matsuda1, Hidenao Fukuyama1, and Hiroshi Shibasaki1 Abstract & We used functional magnetic resonance imaging (fMRI) to left sensorimotor areas and right cerebellum. The kanji versus examine whether the act of writing involves different neuro- kana comparison showed increased responses in the left psychological mechanisms between the two script systems of prefrontal and anterior cingulate areas. Especially, the lPITC the Japanese language: kanji (ideogram) and kana (phono- showed a significant task-by-script interaction. Two additional gram). The main experiments employed a 2 Â 2 factorial control tasks, repetition (REP) and semantic judgment (SJ), design that comprised writing-to-dictation and visual mental activated the bilateral perisylvian areas, but enhanced the lPITC recall for kanji and kana. For both scripts, the actual writing response only weakly. These results suggest that writing of the produced a widespread fronto-parietal activation in the left ideographic and phonographic scripts, although using the hemisphere. Especially, writing of kanji activated the left largely same cortical regions, each modulates the visual word- posteroinferior temporal cortex (lPITC), whereas that of retrieval system according to their graphic features. Further- kana also yielded a trend of activation in the same area. more, comparisons with two additional tasks indicate that the Mental recall for both scripts activated similarly the left parieto- activity of the lPITC increases especially in expressive language temporal regions including the lPITC.
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