| Budget Amount *help |
¥19,630,000 (Direct Cost: ¥15,100,000、Indirect Cost: ¥4,530,000)
Fiscal Year 2013: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2012: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2010: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
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| Research Abstract |
Human visual system is suggested to have two kinds of visual motion mechanisms that differ in their most sensitive velocity. However, the mechanisms of very slow motion, and its interaction with the fast motion are unclear. We addressed these issues with a direction selective adaptation technique in both psychophysical and fMRI methods, and with a masking technique in psychophysics.
Psychophysical results showed that there are two different motion systems with different spatiotemporal tunings.fMRI results showed that the two motion systems exist in different visual areas: first motion system in MT+ and slow motion system in V4.
We also investigated the spatiotemporal stimulation on retina in everyday life. The results showed tendency that the stimulation extends to high temporal frequencies when people are moving comparing with when people are immobile. These results may indicate that the two different motion systems exist at different cortical sites and works for different functions.
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