Role of central command on the visceral flow regulation during exercise

运动过程中中枢指挥对内脏流量调节的作用

• 批准号: 17300198
• 负责人: SADAMOTO Tomoko
• 金额: $ 3.58万
• 依托单位: Japan Women's College of Physical Education
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2005
• 资助国家: 日本
• 起止时间: 2005 至 2006
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-17300198/
• 关键词: voluntary exercise; active exercise; passive exercise; renal artery; superior mesenteric artery; ultrasound method; onset of exercise; 肘屈曲伸展動作; 中枢指令; 超音波画像診断; 総頚動脈血流; 中大脳動脈血流; 上腸間膜動脈血流

Central command is well known to control cardiac and skin sympathetic nervous activities but still equivocal for visceral circulatory adjustments during voluntary exercise. The present study focused on whether central command is essential for the blood flow regulation in renal and gastrointestinal arteries during voluntary exercise. We firstly tested active (voluntary) and passive (non-voluntary and motor-driven) elbow-flexion exercises with various amplitudes and velocities of movements. This experiment provided that the elbow-flexion moving from 40 to 90 degree with a speed of 90 degree/sec was the most relevant to manifest a clear difference between passive and active exercises in the cardiovascular variables. In the second experiments, we investigated the blood flow responses in renal artery (RA) during static handgrip exercise with a load of 30 % of maximum voluntary contraction (MVC) by using ultrasound method. This experiment showed that the renal arterial blood flow began to de … More crease significantly immediately after the onset of exercise (within 10 sec), suggesting that central command and/or muscle mechanoreflex were probably responsible for the rapid adjustment to exercise. In the third experiments, the blood flow responses in the superior mesenteric artery (SMA) were similarly studied at the onset of dynamic elbow flexion with a load of 30 % MVC. In contrast to the RA responses, the blood flow in SMA did not change at the onset of exercise suggesting no contribution of central command and/or mechanoreflex to the flow responses in SMA. In fourth experiments, we compared the flow responses between passive and active exercises in RA and SMA to determine which is more important between central command or mechanoreflex for the rapid adjustment to exercise. There was no difference in flow responses between passive and active exercises in both RA and SMA. From these results, we concluded that central command does not play an important role in regulating flow responses in visceral regions during voluntary exercise. Less

中央命令是weldiac和皮肤交感神经循环调整，循环调整是自愿运动的。 ）肘部练习具有各种振幅和速度的速度。在心血管变量中。在锻炼之后显着出现。与RA响应相比，SMA的血流与中央命令和/或机械的流量最大的载荷相比，我们比较了SMA中的流动响应。 RA和Smine的练习在RA和SMA中的快速调整之间更为重要。在自愿运动中