Mechanical Power Output of Muscle

横纹肌的机械功率输出 通过测量肌肉张力来确定， 周期性的长度变化和刺激，发生在选定的 周期的长度。 肌肉张力与 一个循环的长度形成一个循环，其面积是 或肌肉上的运动 该项目的目标是： 1)为了将昆虫翅膀的机械功率测量结果与联合收割机的测量结果结合起来， 同时测量肌肉的耗氧量， 为了测量肌肉在转换中的效率， 代谢到机械动力，并确定是否操作 使功率输出最大化的条件也是那些 最大化效率。 2)将功率测量扩展到肌肉 除了昆虫翅膀的肌肉，以确定如何类似 或不相似的是来自不同来源的肌肉， 机械动力输出能力。 3)为了描述力的特征- 肌肉缩短和延长的速度曲线， 刺激后不同的时间，并使用这些信息， 创建一个模型，该模型将允许估计功率输出 从经受周期性长度变化和阶段性 刺激. 4)为了表征肌肉中的释放失活， 并确定释放失活影响 重复收缩时的功率输出。

The mechanical power output of a striated muscle will be determined by measuring muscle tension as the muscle is subjected to periodic length change and to stimuli which occur at selected phases of the length cycle. The plot of muscle tension against length over a cycle forms a loop whose area is the work done by or on the muscle for that cycle. The goals of this project are: 1) To combine mechanical power measurements from insect wing muscles with simultaneous measurement of oxygen consumption in order to measure the efficiency of the muscle in converting metabolic to mechanical power, and to determine if the operating conditions which maximize power output are also those which maximize efficiency. 2) To extend power measurements to muscles other than insect wing muscles in order to determine how similar or dissimilar are muscles from different sources in their capacity for mechanical power output. 3) To characterize force- velocity curves for both shortening and lengthening muscles at different times after stimulation, and to use this information to create a model which will allow estimation of the power output from a muscle subjected to periodic length change and phasic stimulation. 4) To characterize release inactivation in muscle, and to determine the extent to which release inactivation affects power output during repetitive contraction.