| Budget Amount *help |
¥20,150,000 (Direct Cost: ¥15,500,000、Indirect Cost: ¥4,650,000)
Fiscal Year 2013: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2012: ¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2011: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
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| Research Abstract |
We developed a visual sign system where object categories were symbolically represented by distinct combinations of visual elements. Macaque monkeys (Macaca fuscata) learned to use these composite symbols by combining and decomposing elements. We conducted multichannel electrtocorticographic (ECoG) recording from the prefrontal cortex and inferior temporal cortex of the monkeys. Analyses of event-related spectral perturbation of the prefrontal ECoG signals revealed areal segregation for combination and decomposition of symbol elements in specific frequency band powers. Functional magnetic resonance imaging in healthy human subjects revealed insular activation during reading particularly when segmentation of letterstrings was required compared to segmentation was not required. Furthermore, we tested symmetry of symbolic use in three macaque monkeys. Symbolic association was symmetrically learned in two macaques but not in one animal, indicating the need for further testing.
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