应用激光衍射法对静息蟾蜍缝匠肌肌节长度的研究

首都医科大学学报 ›› 1987, Vol. 8 ›› Issue (1): 17-21.

应用激光衍射法对静息蟾蜍缝匠肌肌节长度的研究

陈孝良¹, 姜远海², 刘志诚²

1. 首都医学院生理教研室;2. 首都医学院物理教研室

收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1987-01-15 发布日期:1987-01-15

Laser Diffraction Studies on the Sarcomere Length in Toad Sartorius Muscle at Static State

Chen Xiaoliang¹, Jiang Yuanhai², Liu Zhicheng²

Department of Physiology

Received:1900-01-01 Revised:1900-01-01 Online:1987-01-15 Published:1987-01-15

摘要/Abstract

摘要： 本文采用激光衍射法观察了静息状态下蟾蜍缝匠肌的肌节长度。所用标本均能衍射出图像,并能清晰地显示在距标本160cm处的屏幕上。肌节长度按Bragg公式计算,它与屏幕上0级至1级明纹的距离有关。本实验证实肌肉两端的肌节长度小于肌肉中部的肌节长度,而中部肌节长度的变化很小。肌肉松驰时的肌节长度是2.12±0.04μm(X±SD n=12),被动牵拉肌肉可达到的最大肌节长度是3.65±0.25μm(X±SD n=12)。当用离体肌肉标本保持其于在体长度(功能位)时,肌肉中部的肌节长度为2.73±0.20μm(X±SD n=12),与在体实验结果一致。

关键词: 肌节长度, 骨骼肌, 激光, 衍射技术

Abstract: The sarcomere length at static state was investigated in whole sartorius muscle of toad using laser diffraction techniques.The distinct diffraction pattern on a screen which distance from the preparation was 160 cm could be obtained from all the preparations used.The sarcomere length was calculated by Bragg equation,which is related to the distance between the zero and first order lines on the screen. In the present experiments,it was confirmed the sarcomere length near the ends of the muscle was shorter than in the middle and the sarcomere length variation in the middle was extremely small.The sarcomere length of the slack muscle was 2.12±0.04μm(X±SD n=12). The maximum sarcomere length that the mnscle can be stretched was 3.65±0.25μm(X±SD n=12).When the muscle was fixed at the length in the body(functional position),the middle sarcomere length was 2.73±0.02μm(X±SD n=8)in vitro.This result was again confirmed in situ.

Key words: sarcomere length, skeletal muscle, laser, diffraction technique

陈孝良;姜远海;刘志诚. 应用激光衍射法对静息蟾蜍缝匠肌肌节长度的研究[J]. 首都医科大学学报, 1987, 8(1): 17-21.

Chen Xiaoliang;Jiang Yuanhai;Liu Zhicheng. Laser Diffraction Studies on the Sarcomere Length in Toad Sartorius Muscle at Static State[J]. Journal of Capital Medical University, 1987, 8(1): 17-21.

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