Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles:: Implications for surgical tendon transfer
Fiber length variability within the flexor carpi ulnaris and flexor carpi radialis muscles:: Implications for surgical tendon transfer
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DOI：
10.1016/j.jhsa.2004.04.028
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发表时间：
2004-09-01
影响因子：
1.9
通讯作者：
Lieber, RL
中科院分区：
文献类型：
--
作者：
Fridén, J;Lovering, RA;Lieber, RL
目的：本研究的目的是了解人体桡侧腕屈肌（FCR）和尺侧腕屈肌（FCU）肌肉的详细结构特性及其对肌腱transfer surgery.Methods的影响：肌纤维长度测定在6个独立的区域的FCU和FCR从10具尸体标本。通过激光衍射测量肌节长度用于标准化。通过测量肌腱相对于关节角度的偏移来估计力臂。运动神经分支进入每块肌肉的位置也进行了测量，以建立肌肉mobilation.Results的安全长度的限制：肌纤维长度变化显着沿着FCU和FCR。FCU的纤维长度变异性是FCR的两倍。尽管所有区域的两种肌肉的平均纤维长度相似（FCR为62.6 +/- 2.1 mm，FCU为63.1 +/- 4.0 mm），但FCU的近端纤维比FCR的近端纤维长，FCU的远端纤维比FCR的远端纤维短。第二神经分支进入肌肉的99%置信区间为FCU和FCR分别位于内上髁远端69 mm和73 mm处。结论：这些数据显示FCU和FCR的设计不同。纤维长度变化的功能意义尚不清楚，但意味着，当用于肌腱转移时，适当动员的FCU具有更大的偏移。美国手外科学会版权所有（C）2004。
Purpose: The purpose of this study was to understand the detailed architectural properties of the human flexor carpi radialis (FCR) and flexor carpi ulnaris (FCU) muscles and their implications for tendon transfer surgery.Methods: Muscle fiber length was measured in 6 separate regions of the FCU and FCR from 10 cadaveric specimens. Sarcomere length was measured by laser diffraction for normalization. Moment arms were estimated by measuring tendon excursion with respect to joint angle. The position of entry of the motor nerve branches into each muscle also was measured to establish limits for the safe length of muscle mobilization.Results: Muscle fiber length varied significantly along both the FCU and FCR. Fiber length variability in the FCU was twice that of the FCR. Although the average fiber length for both muscles across all regions was similar (62.6 +/- 2.1 mm for the FCR and 63.1 +/- 4.0 mm for the FCU), the proximal fibers of the FCU were longer compared with the proximal fibers of the FCR and the distal fibers of the FCU were shorter compared with the distal fibers of the FCR. The 99% confidence interval for the second nerve branch entry into the muscles was located similar to69 mm distal to the medial epicondyle for the FCU and approximately 73 mm distal for the FCR.Conclusions: These data show different designs of both the FCU and the FCR. The functional significance of fiber length variability is not clear but imply that, when used in tendon transfer, the properly mobilized FCU has a much greater excursion. Copyright (C) 2004 by the American Society for Surgery of the Hand.