| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2013: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
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| Outline of Final Research Achievements |
In primates, neural representations of visual objects are hierarchically constructed along the ventral visual pathway. In this pathway, neural coding of a “novel” feature of visual objects is thought to emerge and become prevalent at a single cortical area as a result of processing in the area. We tested the possibility that a feature representation prevalent in a given cortical area emerges in the microcircuit of a hierarchically prior cortical area as a small number of prototypes and then becomes prevalent in the subsequent area. We recorded activities of multiple single neurons in each of hierarchically sequential areas TE and 36 of macaque temporal cortex and found the predicted convergent microcircuit for object-object association in the lower-order area TE. Associative codes were then built up over time in the microcircuit of the higher-order area 36. These results suggest a computational principle underlying sequentially elaborated object representations across cortical areas.
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