Smeulders Mark J C, Kreulen Michiel, Hage J Joris, Huijing Peter A, van der Horst Chantal M A M
Department of Plastic, Reconstructive and Hand Surgery, Academic Medical Centre, Suite G4-226, P.O. Box 22700, 1100 DE Amsterdam, The Netherlands.
Muscle Nerve. 2005 Aug;32(2):208-15. doi: 10.1002/mus.20360.
Recent animal experiments have shown that up to 37% of muscle force may be transmitted to adjacent structures rather than reach the insertion of the muscle's tendon, and that the extent of such force transmission depends on the length and relative position of these structures. We tested whether the force-length characteristics of the distally tenotomized human flexor carpi ulnaris muscle (FCU) of nine patients with cerebral palsy varied with the change of relative length of adjacent structures induced by a change of wrist position. In four patients, the FCU exerted up to 40% more active force in a flexed wrist position at short FCU length, whereas the active force was not significantly higher in the other five. In the same manner, passive force-length characteristics of the spastic FCU changed upon changes in wrist position. Variability in myofascial force transmission may partly explain the variability in success of the FCU-transfer.
最近的动物实验表明，高达37%的肌肉力量可能会传递到相邻结构，而不是到达肌肉肌腱的附着点，并且这种力量传递的程度取决于这些结构的长度和相对位置。我们测试了9名脑瘫患者远侧肌腱切断的尺侧腕屈肌（FCU）的力-长度特性是否会随着腕部位置变化引起的相邻结构相对长度的改变而变化。在4名患者中，当FCU长度较短时，在腕部屈曲位置，FCU产生的主动力增加了40%，而在其他5名患者中，主动力没有显著升高。同样，痉挛性FCU的被动力-长度特性也会随着腕部位置的变化而改变。肌筋膜力量传递的变异性可能部分解释了FCU转移手术成功率的差异。
