FUNCTIONAL-MORPHOLOGY OF THE ENDOMYSIUM IN SERIES FIBERED MUSCLES
FUNCTIONAL-MORPHOLOGY OF THE ENDOMYSIUM IN SERIES FIBERED MUSCLES
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DOI：
10.1002/jmor.1052120203
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发表时间：
1992-05-01
影响因子：
1.5
通讯作者：
PURSLOW, PP
中科院分区：
文献类型：
--
作者：
TROTTER, JA;PURSLOW, PP
许多骨骼肌，包括猫股二头肌，是由短，锥形肌纤维排列在一个重叠的纵向系列。这种肌肉的肌内膜在重叠的肌纤维之间传递张力，因此是与它们串联的弹性元件。猫股二头肌的肌内膜含有近似各向同性（随机）阵列的曲线胶原纤维。随着肌纤维在生理范围内缩短或延长，胶原纤维仅经历适度的重新定向。几何模型预测肌纤维长度变化时肌内膜厚度无变化，并将肌内膜中预期的胶原纤维重定向量化为肌肉伸展的函数。它还表明，高比例的胶原纤维将在所有肌节长度的曲线。肌内膜胶原的组织适于通过剪切在肌纤维之间转移负荷。
Many skeletal muscles, including the feline biceps femoris, are composed of short, tapered myofibers arranged in an overlapping longitudinal series. The endomysium of such muscles transfers tension between overlapping myofibers, and is thus an elastic element in series with them. The endomysium of the cat biceps femoris contains curvilinear collagen fibrils in an approximately isotropic (random) array. The collagen fibrils undergo only a modest reorientation as the myofibers shorten or lengthen within the physiological range. A geometrical model predicts no change in the thickness of the endomysium on changing muscle fiber length and quantifies the expected collagen fibril reorientation in the endomysium as a function of muscle extension. It is also demonstrated that a high proportion of the collagen fibrils will be curvilinear at all sarcomere lengths. The organization of endomysial collagen is appropriate for the transfer of loads between myofibers by means of shear.