| Budget Amount *help |
¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2013: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2012: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2011: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
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| Research Abstract |
Body temperature in humans is controlled by heat dissipation due to large amounts of skin blood flow and sweat in the hot. However, since blood pooling in skin vessels in an upright position and hypovolemia due to sweat loss decrease venous return to the heart, it threatens blood pressure maintenance. To prevent this, skin vasodilation is suppressed through baroreflexes. Recently, we suggested that a component of skin sympathetic nerve activity (SSNA) synchronized with cardiac cycle was an efferent path of the baroreflex control of skin blood flow; however, it might contain muscle sympathetic nerve activity (MSNA). Here, we found in hyperthermic men that the SSNA component decreased while MSNA increased with head-up tilt. Thus, the component unlikely contains MSNA.
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