| Budget Amount *help |
¥19,240,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥4,440,000)
Fiscal Year 2014: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2013: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2012: ¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2011: ¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
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| Outline of Final Research Achievements |
Skin blood vessel will dilate and constrict with changes in peripheral temperature. Cold induced vasodilation (CIVD) in the finger tips occurs after the start of local cold exposure of the extremities. Heat induced vasoconstriction (HIVC) elicited by local heating have been observed. However, the mechanism of CIVD and HIVC is still not clear. Wavelet analysis of blood flow reveals various peaks in the power spectrum corresponding to specific origins: (1) cardiac activity,(2) respiratory activity, (3) myogenic activity, (4) neurogenic activity, and (5) endothelial activity. We investigated which factors are dominant to CIVD and HIVC. We also investigated the effect of light exposure on skin blood flow. It was found that endothelial, neurogenic, and myogenic activity were related to CIVD, and neurogenic and myogenic activity was related to HIVC. It was also found that endothelial, neurogenic, and myogenic activity related to decrease of blood flow under blue light exposure.
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