Maas Huub, Huijing Peter A
Research Institute MOVE, Faculty of Human Movement Sciences, VU University, Amsterdam, The Netherlands.
Muscles Ligaments Tendons J. 2012 Apr 1;1(4):127-33. Print 2011 Oct.
We investigated the extent of mechanical interaction between rat flexor carpi ulnaris (FCU) and palmaris longus (PL) muscles following transfer of FCU to the distal tendons of extensor carpi radialis brevis and longus (ECRB/L) muscles. Five weeks after recovery from surgery, isometric forces exerted at the distal tendons of FCU and PL were quantified at various FCU lengths. PL was kept at a constant length. Changing the muscle-tendon complex length of transferred FCU (by maximally 3.5 mm) decreased PL force significantly (by 7%). A linear relationship was found between changes in FCU muscle belly length, being a measure of muscle relative positions, and PL force. These results indicate that despite transfer of FCU muscle to the extensor side of the forearm, changing FCU length still affects force transmission of its, now, antagonistic PL muscle. We conclude that a transferred muscle may still be mechanically linked to its former synergistic muscles.
我们研究了将大鼠尺侧腕屈肌(FCU)转移至桡侧腕短伸肌和桡侧腕长伸肌(ECRB/L)远端肌腱后,FCU与掌长肌(PL)之间的机械相互作用程度。术后恢复五周后,在不同的FCU长度下,对FCU和PL远端肌腱施加的等长力进行了量化。PL保持在恒定长度。改变转移的FCU的肌腱复合体长度(最大3.5毫米)会显著降低PL力(降低7%)。在作为肌肉相对位置指标的FCU肌腹长度变化与PL力之间发现了线性关系。这些结果表明,尽管FCU肌肉已转移至前臂伸侧,但改变FCU长度仍会影响其现在的拮抗肌PL的力传递。我们得出结论,转移的肌肉可能仍与其先前的协同肌存在机械联系。