An electrohydraulic apparatus for the measurement of static and dynamic properties of rabbit muscles.
An electrohydraulic apparatus for the measurement of static and dynamic properties of rabbit muscles.
复制标题
一种用于测量兔肌肉静态和动态特性的电液装置。
DOI：
10.1152/jappl.1991.70.2.938
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Salmons,S
中科院分区：
文献类型：
--
作者：
Jarvis,JC;Salmons,S
本通信中所描述的装置能够确定整个兔肌肉在体内的力-速度关系，并在指定的外部工作速率下评估其抗疲劳性。测力计产生恒定速度运动，控制力高达50 N，速度范围高达500 mm/s，距离为20 mm。该距离对应于兔胫骨前肌从足跖屈到足背屈的缩短范围，相当于约28%的纤维缩短。可以允许激活的肌肉从其等长力轨迹上的任何点以恒定速度缩短。疲劳测试的循环释放可以在6-8小时内以高达30次释放/分钟的速率进行。测力计的释放和返回冲程的定时在数字编程器的控制下，该数字编程器还控制向肌肉神经递送激活刺激和向记录设备递送触发信号。选择电液设计是因为它比电磁致动器更容易设计，在连续循环使用中可靠，并且可以至少部分地由可用的工业部件组装。
The apparatus described in this communication enables the force-velocity relationship to be determined for whole rabbit muscles in vivo and their resistance to fatigue to be assessed at specified rates of external work. The ergometer generates constant-velocity motion, controlling a force of up to 50 N, over a range of velocity up to 500 mm/s and a distance of 20 mm. This distance corresponds to the range of shortening of the rabbit tibialis anterior muscle from full plantar flexion to full dorsiflexion of the foot, equivalent to approximately 28% fiber shortening. Activated muscles can be allowed to shorten at constant velocity from any point on their isometric force trajectory. Cyclic releases for fatigue testing can be made at rates up to 30 releases/min over a period of 6-8 h. The timing of the release and return strokes of the ergometer is under the control of a digital programmer that also synchronizes the delivery of activating stimuli to the muscle nerve and trigger signals to the recording equipment. An electrohydraulic design was chosen because it is simpler to engineer than an electromagnetic actuator, is reliable in continuous cyclic use, and can be assembled, at least in part, from available industrial components.