IN-VIVO MEASUREMENT OF HUMAN WRIST EXTENSOR MUSCLE SARCOMERE-LENGTH CHANGES
IN-VIVO MEASUREMENT OF HUMAN WRIST EXTENSOR MUSCLE SARCOMERE-LENGTH CHANGES
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DOI：
10.1152/jn.1994.71.3.874
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发表时间：
1994-03-01
影响因子：
2.5
通讯作者：
FRIDEN, J
中科院分区：
文献类型：
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作者：
LIEBER, RL;LOREN, GJ;FRIDEN, J
1.采用激光衍射法测量了5例受试者桡侧腕短伸肌（ECRB）肌节长度.在另一项尸体研究中，ECRB肌腱被加载到肌肉预测的最大强直张力，并测量肌腱应变以估计以肌腱延长为代价的主动肌节缩短。当腕关节被动地从完全伸展到完全屈曲时，ECRB肌节长度以7.6 nm/deg关节角旋转的速率从2.6 μ m增加到3.4 μ m。在肌肉激活过程中校正肌腱伸长产生了2.44至3.33 μ m的活性肌节长度范围。伴随肌肉激活的最大预测肌节缩短依赖于初始肌节长度，并且总是
1. Human extensor carpi radialis brevis (ECRB) sarcomere length was measured intraoperatively in five subjects using laser diffraction.2. In a separate cadaveric study, ECRB tendons were loaded to the muscle's predicted maximum tetanic tension, and tendon strain was measured to estimate active sarcomere shortening at the expense of tendon lengthening.3. As the wrist joint was passively flexed from full extension to full flexion, ECRB sarcomere length increased from 2.6 to 3.4 mu m at a rate of 7.6 nm/deg joint angle rotation. Correcting for tendon elongation during muscle activation yielded an active sarcomere length range of 2.44 to 3.33 mu m. Maximal predicted sarcomere shortening accompanying muscle activation was dependent on initial sarcomere length and was always