Acute effects of intramuscular aponeurotomy and tenotomy on multitendoned rat EDL: Indications for local adaptation of intramuscular connective tissue
Acute effects of intramuscular aponeurotomy and tenotomy on multitendoned rat EDL: Indications for local adaptation of intramuscular connective tissue
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DOI：
10.1002/ar.10045
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发表时间：
2002-02-01
影响因子：
--
通讯作者：
Huijing, PA
中科院分区：
文献类型：
--
作者：
Jaspers, RT;Brunner, R;Huijing, PA
肌腱和部分肌纤维的连续性的干预允许调查肌筋膜力传递。本研究探讨了近端腱膜切开术对趾长伸肌（EDL）的长度-力特性和几何形状的影响，并将这些影响与趾长伸肌的远端腱膜切开术（TT）和肌内筋膜切开术（IF）的影响进行了比较。近端腱膜切开术后，干预部位下方的肌内结缔组织自发破裂。由于该断裂，近端腱膜内出现间隙。仅在一端与肌腱连续的纤维比干预前短得多。最佳肌肉力量减少了29%。在远端TT（头II-IV）后，肌腹内出现间隙。这种差距在更高的肌肉长度增加。然而，差距的长度比腱膜切开后小得多。尽管存在TT相关间隙，但股骨头IV和V之间界面处的肌内结缔组织没有破裂，就像近端腱膜切开术后一样。TT对长度-力特性的影响和对仅在一端与肌腱连续的纤维长度的影响比腱膜切开术的影响小得多。随后IF头IV和V之间界面长度的三分之二导致与近端腱膜切开术加破裂的影响相似的变化。关于肌内结缔组织破裂发生率的对比表明远端位置肌内结缔组织的失效强度增加。据推测，在体内的多腱肌肉，局部剪切和应力变形将启动局部适应的肌内结缔组织。Anat Rec 266：123-135，2002年。(C)2002 Wiley-Liss，Inc.
Intervention with the continuity of the tendon and part of the muscle fibers allows investigation of myofascial force transmission. The present study investigates the effects of proximal aponeurotomy on length-force characteristics and the geometry of the extensor digitorum longus (EDL) muscle, and compares those effects with the effects of both distal tenotomy (TT) and intramuscular fasciotomy (IF) of the EDL. After proximal aponeurotomy, the intramuscular connective tissue ruptured spontaneously below the location of intervention. Due to this rupturing, a gap developed within the proximal aponeurosis. The fibers that were continuous with the tendon at only one end were substantially shorter than before the intervention. Optimum muscle force was reduced by 29%. After distal TT (of heads II-IV) a gap developed within the muscle belly. This gap increased at higher muscle lengths. However, the length of the gap was much smaller than after aponeurotomy. Despite the TT-related gap, there was no rupturing of intramuscular connective tissue at the interface between heads IV and V, as there was after proximal aponeurotomy. The effects of TT on length-force characteristics and on lengths of fibers continuous with the tendon at only one end were much less compared to the effects of aponeurotomy. Subsequent IF for two-thirds the length of the interface between heads IV and V resulted in changes similar to the effects of proximal aponeurotomy plus rupture. The contrast regarding the occurrence of intramuscular connective tissue rupture indicates increased failure strength of the intramuscular connective tissue at distal locations. It is hypothesized that for multitendoned muscles in vivo, local shear and stress deformations will initiate local adaptation of the intramuscular connective tissue. Anat Rec 266:123-135, 2002. (C) 2002 Wiley-Liss, Inc.