20日間の模擬微小重力暴露後の血圧調節におよぼす心拍出量および筋交感神経活動の寄与率

抄録

We examine that the contribution rate of cardiac output and muscle sympathetic nerve activity (MSNA) on orthstatic torerance induced by simulated weightlessness using 20 days head-down bed rest. The subjects lay on the tilt table at the 0° horizontal position and was then inclined to the 15° head-up, 30° head-up and 60° head-up position. The tilt table remained in each position for 15 min. MSNA was recorded from the tibial nerve at the popliteal fossa with tungsten microelectrode. [J Physiol Sci. 2008;58 Suppl:S110]