| Budget Amount *help |
¥17,680,000 (Direct Cost: ¥13,600,000、Indirect Cost: ¥4,080,000)
Fiscal Year 2015: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2014: ¥4,940,000 (Direct Cost: ¥3,800,000、Indirect Cost: ¥1,140,000)
Fiscal Year 2013: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
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| Outline of Final Research Achievements |
This study investigated a role the extrageniculate visual system [superior colliculus (SC), pulvinar (PUL)] in innate recognition of faces and snakes in monkeys. The results indicated that SC and PUL neurons responded to snakes and faces faster than cortical neurons, and multidimensional scaling (MDS) analyses indicated that population activity of SC and PUL neurons discriminated snakes and facial attributes (identity, direction, sex, etc.) in early latencies less than 100 ms. Furthermore, gamma oscillations (30-80 Hz) of PUL neuronal activity were analyzed in the Early (0-200 ms after stimulus onset) and Late (300-500 ms after stimulus onset) phases. The results showed significant increases in mean strength of gamma oscillations in Early phase for snakes and Late phase for faces. These results suggest that innate recognition of snakes and faces is based on bottom-up processing in the SC and PUL.
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