Power output and the frequency of oscillatory work in mammalian diaphragm muscle: the effects of animal size.
Power output and the frequency of oscillatory work in mammalian diaphragm muscle: the effects of animal size.
复制标题
哺乳动物膈肌的功率输出和振荡工作频率：动物体型的影响。
DOI：
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发表时间：
1991
影响因子：
2.8
通讯作者：
I. S. Young
中科院分区：
文献类型：
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作者：
J. Altringham;I. S. Young
从小鼠、大鼠和家兔的膈肌中分离肌纤维束。在相位刺激和施加正弦长度变化期间确定平均振荡功率输出。在一定的循环频率范围内测量最大功率输出。最大功率输出的循环频率（fopt）随着体重的增加而降低，可用公式fopt = 4.42M-0.16描述，其中M为体重。在陆生四足哺乳动物中，体重与小跑-奔马跃变频率之间的关系也有报道[Heglund et al.（1974），Science 186，1112-1113]，并讨论了这种相似性的意义。
Bundles of muscle fibres were isolated from the diaphragm of mouse, rat and rabbit. Mean oscillatory power output was determined during phasic stimulation and imposed sinusoidal length changes. Maximum power output was measured over a range of cycle frequencies. The cycle frequency for maximum power output (fopt) decreased with increasing body mass and was described by the equation, fopt = 4.42M-0.16, where M is body mass. A very similar relationship has been reported between body mass and the frequency of the trot-gallop transition in terrestrial, quadrupedal mammals [Heglund et al. (1974), Science 186, 1112-1113), and the significance of this similarity is discussed.