目的：探讨人胸大肌、胸小肌肌梭的形态、分布及其与梭外肌纤维型的关系。
Objective: To study the muscle spindle morphology, distribution and their relationship with the fiber-types in human pectoralis major and pectoralis minor.
结果光镜下可见位于眼外肌肌-腱连接处的EMP神经纤维终止于邻近单个梭外肌纤维的起始处或两侧；
Results Under light microscopy, at the myotendinous junction of the extraocular muscle, the EMP nerve fibers were ended at the initial site or the bilateral sides of a nearby single extrafusal fiber.
模拟失重除影响肌梭外肌纤维MHC的表达、引起肌纤维类型转换外，还导致梭内肌纤维MHC表达表型发生改变。
The simulated weightlessness not only results in changes in expression of MHC in extrafusal fibers and transformation of myofiber type, but also changes in expression of MHC in intrafusal fibers.
有5例患者可见典型的类圆形、弧形、三角形或梭形肌质块，位于肌纤维中央、外周、一角或一侧，其形态与在肌纤维中所处的位置有关。
The classical sarcoplasmic masses were shown in the shape of round, arc, triangular, or fusiform in 5 cases, which located in the center, peripheral, corner or lateral side of fibers.
有5例患者可见典型的类圆形、弧形、三角形或梭形肌质块，位于肌纤维中央、外周、一角或一侧，其形态与在肌纤维中所处的位置有关。
The classical sarcoplasmic masses were shown in the shape of round, arc, triangular, or fusiform in 5 cases, which located in the center, peripheral, corner or lateral side of fibers.
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