Comparison of the exercise pressor reflex between forelimb and hindlimb muscles in cats.
Comparison of the exercise pressor reflex between forelimb and hindlimb muscles in cats.
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猫前肢和后肢肌肉运动加压反射的比较。
DOI：
10.1152/ajpregu.2001.281.4.r1127
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
Kaufman,MP
中科院分区：
文献类型：
--
作者：
Hayashi,N;Hayes,SG;Kaufman,MP
在用α-氯醛糖麻醉的13只猫上，我们比较了后肢肌群小腿三头肌和前肢肌群肱三头肌对静态收缩和肌腱伸展的心血管反应和舒张反应。两组肌肉的静态收缩和拉伸均增加了平均动脉压和心率，并且反应与所产生的张力成正比。然而，当肱三头肌收缩或伸展时，心血管的增加显著大于小腿三头肌收缩或伸展时（P< 0.05），即使在任何一种动作产生的张力被校正为肌肉重量时。同样地，当肱三头肌被拉伸时，比当小腿三头肌被拉伸时，增加的幅度更大。任何一组肌肉的收缩都不会增加通气量。我们的研究结果表明，在麻醉猫的心血管反应的静态收缩和肌腱拉伸时，产生于前肢肌肉比后肢肌肉更大。
In thirteen cats anesthetized with α-chloralose, we compared the cardiovascular and ventilatory responses to both static contraction and tendon stretch of a hindlimb muscle group, the triceps surae, with those to contraction and stretch of a forelimb muscle group, the triceps brachii. Static contraction and stretch of both muscle groups increased mean arterial pressure and heart rate, and the responses were directly proportional to the developed tension. The cardiovascular increases, however, were significantly greater (P< 0.05) when the triceps brachii muscles were contracted or stretched than when the triceps surae muscles were contracted or stretched, even when the tension developed by either maneuver was corrected for muscle weight. Likewise, the ventilatory increases were greater when the triceps brachii muscles were stretched than when the triceps surae muscles were stretched. Contraction of either muscle group did not increase ventilation. Our results suggest that in the anesthetized cat the cardiovascular responses to both static contraction and tendon stretch are greater when arising from forelimb muscles than from hindlimb muscles.