The gastrocnemius muscle is an antagonist of the anterior cruciate ligament
The gastrocnemius muscle is an antagonist of the anterior cruciate ligament
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DOI：
10.1016/s0736-0266(01)00057-2
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发表时间：
2001-11-01
影响因子：
2.8
通讯作者：
Badger, GJ
中科院分区：
文献类型：
--
作者：
Fleming, BC;Renstrom, PA;Badger, GJ
由于腓肠肌的近端肌腱包裹着胫骨的后部，因此其收缩可能会通过向前推动胫骨而拉伤前十字韧带（ACL）。然而，腓肠肌收缩与 ACL 应变之间的关系尚未在体内研究。本研究的目的是评估腓肠肌孤立收缩引起的 ACL 应变反应，并确定这些应变如何受到腘绳肌和股四头肌共同收缩的影响。六名 ACL 正常的受试者参与了这项研究；他们接受了脊髓麻醉，以确保腿部肌肉组织放松。经皮肌肉电刺激 (TEMS) 用于诱导腓肠肌、股四头肌和腘绳肌的收缩，同时使用差动可变磁阻传感器测量 ACL 前内侧束的应变。腓肠肌收缩产生的 ACL 应变值取决于踝关节扭矩和膝关节屈曲角度的大小。膝关节弯曲 5 度和 15 度时分别产生 2.8% 和 3.5% 的应变。 ACL 在 30 度和 45 度时没有拉伤。踝关节角度的变化并没有显着影响这些应变值。当膝盖处于 15 度和 30 度时，腓肠肌和股四头肌的共同收缩产生的 ACL 应变值大于任一肌群单独激活所产生的应变值。腓肠肌和腘绳肌的共同收缩产生的应变高于腘绳肌单独收缩产生的应变。在膝关节屈曲 15 度和 30 度时，共同收缩应变值小于单独刺激腓肠肌产生的应变值。这项研究证实腓肠肌是 ACL 的拮抗剂。由于腓肠肌是膝关节的屈肌，这一发现可能对 ACL 康复具有重要的临床影响，因为屈肌扭矩通常被认为可以保护愈合的 ACL 移植物。 (C) 2001 年骨科研究学会。由爱思唯尔科学有限公司出版。保留所有权利。
Since the proximal tendon of the gastrocnemius muscle wraps around the posterior aspect of the tibia, its contraction could potentially strain the anterior cruciate ligament (ACL) by pushing the tibia anteriorly. However, the relationship between contraction of the gastrocnemius muscle and ACL strain has not been studied in vivo. The objectives of this study were to evaluate the ACL strain response due to isolated contractions of the gastrocnemius muscle and to determine how these strains are affected by cocontraction with the hamstrings and quadriceps muscles. Six subjects with normal ACLs participated in the study; they underwent spinal anesthesia to ensure that their leg musculature was relaxed. Transcutaneous electrical muscle stimulation (TEMS) was used to induce contractions of the gastrocnemius, quadriceps and hamstrings muscles while the strains in the anteromedial bundle of the ACL were measured using a differential variable reluctance transducer. The ACL strain values produced by contraction of the gastrocnemius muscle were dependent on the magnitude of the ankle torque and knee flexion angle. Strains of 2.8% and 3.5% were produced at 5 degrees and 15 degrees of knee flexion, respectively. The ACL was not strained at 30 degrees and 45 degrees. Changes in ankle angle did not significantly affect these strain values. Co-contraction of the gastrocnemius and quadriceps muscles produced ACL strain values that were greater than those produced by isolated activation of either muscle group when the knee was at 15 degrees and 30 degrees. Co-contraction of the gastrocnemius and hamstrings muscles produced strains that were higher than those produced by the isolated contraction of the hamstrings muscles. At 15 degrees and 30 degrees of knee flexion, the co-contraction strain values were less than those produced by stimulation of the gastrocnemius muscle alone. This study verified that the gastrocnemius muscle is an antagonist of the ACL. Since the gastrocnemius is a flexor of the knee, this finding may have important clinical ramifications in ACL rehabilitation since flexor torques are generally thought to be protective of a healing ACL graft. (C) 2001 Orthopaedic Research Society. Published by Elsevier Science Ltd. All rights reserved.