The authors introduce the principle of laser diffraction method by which the sarcomere length of singlelive striation muscle fiber can be measured accurately and conviently, and give the measuring results of thesarcomere lengths in the relaxed states and its changes of single live frog muscle fibers before and after pas-sive stretches.
介绍测量横纹肌活细胞结构参数肌小节长度的激光衍射法的基本原理,并给出了处于松弛状态的单根青蛙肌纤维的肌小节长度及被动拉伸前后肌小节长度变化的测量结果。