| Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2012: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
Delivery of electrical pulses to visual cortices produces a sensation of small spot of light, indicating a possibility of this technique to be used as a visual prosthesis that assists for blind people. To realize this, it is important to establish stimulation protocols appropriate for visual prosthesis. Therefore, I examined cortical activities in response to intracortical stimulations of various stimulus frequencies and segmented pulse trains interrupted with pause intervals. My results indicate higher frequencies are desirable for evoking spatially localized and temporally constant population activities. Such activities can be observed, even when duty ratio are lowered up to 60%. For realization of visual prosthesis, it is also important to understand the physiological basis of visual prosthesis. We therefore investigated how neuronal population in the visual cortex cooperates to work and revealed the details of spatial range or laminar dependence of such cooperative activities.
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