ARCHITECTURAL DESIGN OF THE HUMAN INTRINSIC HAND MUSCLES
ARCHITECTURAL DESIGN OF THE HUMAN INTRINSIC HAND MUSCLES
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DOI：
10.1016/0363-5023(92)90446-v
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发表时间：
1992-09-01
影响因子：
1.9
通讯作者：
LIEBER, RL
中科院分区：
文献类型：
--
作者：
JACOBSON, MD;RAAB, R;LIEBER, RL
研究了20块不同肌肉(18块内脏肌肉和2块拇指外伸肌肉，共180块肌肉)的构筑特点。测定肌长、肌重、纤维羽角、纤维长度和肌节长度。根据这些值，计算出生理横截面积和纤维长度/肌肉长度比。内在肌肉的长度彼此相对相似，我们将其解释为代表手中的空间限制。然而，观察到了几个专门的建筑设计：腰肌具有极高的纤维长度/肌肉长度比率，这意味着设计倾向于高偏移量。第一拇收肌和第一骨间背侧肌的生理横截面积与外肌相当，远大于其他内肌。骨间肌具有相对较高的生理横截面积和较低的纤维长度/肌长比，提示它们适合于高产力和低漂移。综上所述，这些观察结果说明了内在肌肉功能能力的潜在结构基础。
The architectural features of twenty different muscles (18 intrinsics and 2 thumb extrinsics, n = 180 total muscles) were studied. Muscle length, mass, fiber pennation angle, fiber length, and sarcomere length were determined. From these values, physiologic cross-sectional area and fiber length/muscle length ratio were calculated. Intrinsic muscle lengths were relatively similar to one another, which we interpreted as representing a space constraint within the hand. However, several specialized architectural designs were observed: lumbrical muscles had an extremely high fiber length/muscle length ratio, implying a design toward high excursion. The first dorsal interosseous and adductor pollicis had physiologic cross-sectional areas comparable to those of extrinsic muscles and much greater than those of the other intrinsic muscles. The interosseous muscles had relatively high physiologic cross-sectional areas with low fiber length/muscle length ratios, suggesting their adaptation for high force production and low excursion. Taken together, these observations illustrate the underlying structural basis for the functional capacities of the intrinsic muscles.