Maas H, Baan G C, Huijing P A
Instituut voor Fundamentele en Klinische Bewegingswetenschappen, Faculteit Bewegingswetenschappen, Vrije Universiteit, van der Boechorststraat 9, 1081 BT, Amsterdam, Netherlands.
J Biomech. 2001 Jul;34(7):927-40. doi: 10.1016/s0021-9290(01)00055-0.
Force transmission in rat anterior crural compartment, containing tibialis anterior (TA), extensor hallucis longus (EHL) and extensor digitorum longus (EDL) muscles, was investigated. These muscles together with the muscles of the peroneal compartment were excited maximally. Force was measured at both proximal and distal tendons of EDL muscle as well as at the tied distal tendons of TA and EHL muscles (the TA + EHL complex). Effects of TA + EHL complex length and force on proximally and distally measured forces of EDL muscle kept at constant muscle-tendon complex length were assessed. Length changes of EDL muscle were imposed by movement of the proximal force transducer to different positions.Proximal EDL force was unequal to distal EDL force (active as well as passive) over a wide range of EDL muscle-tendon complex lengths. This is an indication that force is also transmitted out of EDL muscle via pathways other than the tendons (i.e. inter- and/or extramuscular myofascial force transmission). At constant low EDL length, distal lengthening of the TA + EHL complex increased proximal EDL force and decreased distal EDL force. At optimum EDL length, TA+EHL active force was linearly related to the difference between proximal and distal EDL active force. These results indicate intermuscular myofascial force transmission between EDL muscle and the TA + EHL complex. The most likely pathway for this transmission is via connections of the intact intermuscular connective tissue network. The length effects of the TA + EHL complex can be understood on the basis of changes in the configuration, and consequently the stiffness, of these connections. Damage to connective tissue of the compartment decreased the proximo-distal EDL force difference, which indicates the importance of an intact connective tissue network for force transmission from muscle fibers to bone.
对大鼠包含胫骨前肌（TA）、拇长伸肌（EHL）和趾长伸肌（EDL）的前腿部肌室中的力传递进行了研究。这些肌肉与腓骨肌室的肌肉一起被最大程度地激发。在EDL肌肉的近端和远端肌腱以及TA和EHL肌肉的结扎远端肌腱（TA + EHL复合体）处测量力。评估了在保持恒定的肌腱复合体长度的情况下，TA + EHL复合体长度和力对EDL肌肉近端和远端测量力的影响。通过将近端力传感器移动到不同位置来施加EDL肌肉的长度变化。在EDL肌腱复合体的广泛长度范围内，近端EDL力与远端EDL力（主动和被动）不相等。这表明力也通过肌腱以外的途径从EDL肌肉传出（即肌间和/或肌外肌筋膜力传递）。在恒定的低EDL长度下，TA + EHL复合体的远端延长增加了近端EDL力并降低了远端EDL力。在最佳EDL长度下，TA + EHL主动力与近端和远端EDL主动力之间的差异呈线性相关。这些结果表明EDL肌肉与TA + EHL复合体之间存在肌间肌筋膜力传递。这种传递最可能的途径是通过完整的肌间结缔组织网络的连接。TA + EHL复合体的长度效应可以基于这些连接的构型变化以及因此产生的刚度变化来理解。肌室结缔组织的损伤降低了近端到远端的EDL力差，这表明完整的结缔组织网络对于从肌纤维到骨骼的力传递很重要。
