Neuromechanical adaptations in the gastrocnemius muscle after Achilles tendon rupture during walking

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology Pub Date : 2024-11-23 DOI:10.1016/j.jelekin.2024.102962

Raad M. Khair , Jadyn Watt , Maria Sukanen , Neil J. Cronin , Taija Finni

{"title":"Neuromechanical adaptations in the gastrocnemius muscle after Achilles tendon rupture during walking","authors":"Raad M. Khair , Jadyn Watt , Maria Sukanen , Neil J. Cronin , Taija Finni","doi":"10.1016/j.jelekin.2024.102962","DOIUrl":null,"url":null,"abstract":"<div><div>Although some Achilles tendon rupture (ATR) patients regain function in low-force levels activities, it is not yet well known how neuromuscular and structural alterations after ATR manifest during everyday-locomotion. This study assessed medial gastrocnemius (MG) fascicle shortening during walking 1-year after ATR. Additionally, we explored neuromuscular alterations in lateral gastrocnemius (LG), soleus and flexor hallucis longus (FHL) muscles.</div><div>We observed 3.1 pp (95 %CI 0.8–5.4 pp) higher average and 14.5 pp (95 %CI 0.5–28.5 pp) higher peak LG surface electromyography amplitude in the injured compared to the un-injured during walking, but no differences were observed in soleus or FHL. The injured limb fascicles were 12.9 mm shorter while standing compared to the un-injured limb. In absolute terms, MG shortening in the injured limb was 2.8 mm (95 %CI 0.96–4.6 mm) smaller compared to the un-injured limb. However, when normalized to standing fascicle length, the amount of shortening was not different between the limbs.</div><div>Our results showed that 1-year after ATR, MG muscle had remodelled, which manifested as shorter fascicle length during standing. During walking, injured and un-injured MG fascicles showed similar shortening relative to the standing fascicle length, suggesting that MG could function effectively at the new mechanical settings during everyday locomotion.</div></div>","PeriodicalId":56123,"journal":{"name":"Journal of Electromyography and Kinesiology","volume":"80 ","pages":"Article 102962"},"PeriodicalIF":2.0000,"publicationDate":"2024-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Electromyography and Kinesiology","FirstCategoryId":"3","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1050641124001068","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"NEUROSCIENCES","Score":null,"Total":0}

引用次数: 0

Abstract

Although some Achilles tendon rupture (ATR) patients regain function in low-force levels activities, it is not yet well known how neuromuscular and structural alterations after ATR manifest during everyday-locomotion. This study assessed medial gastrocnemius (MG) fascicle shortening during walking 1-year after ATR. Additionally, we explored neuromuscular alterations in lateral gastrocnemius (LG), soleus and flexor hallucis longus (FHL) muscles.

We observed 3.1 pp (95 %CI 0.8–5.4 pp) higher average and 14.5 pp (95 %CI 0.5–28.5 pp) higher peak LG surface electromyography amplitude in the injured compared to the un-injured during walking, but no differences were observed in soleus or FHL. The injured limb fascicles were 12.9 mm shorter while standing compared to the un-injured limb. In absolute terms, MG shortening in the injured limb was 2.8 mm (95 %CI 0.96–4.6 mm) smaller compared to the un-injured limb. However, when normalized to standing fascicle length, the amount of shortening was not different between the limbs.

Our results showed that 1-year after ATR, MG muscle had remodelled, which manifested as shorter fascicle length during standing. During walking, injured and un-injured MG fascicles showed similar shortening relative to the standing fascicle length, suggesting that MG could function effectively at the new mechanical settings during everyday locomotion.

查看原文本刊更多论文

行走时跟腱断裂后腓肠肌的神经机械适应性变化

虽然一些跟腱断裂（ATR）患者在低力量水平的活动中恢复了功能，但ATR后的神经肌肉和结构改变在日常运动中是如何表现出来的，目前还不是很清楚。本研究评估了腓肠肌内侧（MG）筋膜在 ATR 1 年后步行时的缩短情况。我们观察到，与未受伤者相比，受伤者在行走时腓肠肌外侧（LG）、比目鱼肌和拇长屈肌腱（FHL）的平均振幅和峰值分别高出 3.1 pp (95 %CI 0.8-5.4 pp) 和 14.5 pp (95 %CI 0.5-28.5 pp)。与未受伤的肢体相比，受伤肢体在站立时筋膜缩短了 12.9 毫米。就绝对值而言，与未受伤肢体相比，受伤肢体的 MG 缩短了 2.8 毫米（95 %CI 0.96-4.6 毫米）。我们的研究结果表明，ATR 1 年后，MG 肌肉发生了重塑，表现为站立时束带长度缩短。在行走过程中，受伤和未受伤的 MG 肌束相对于站立时的肌束长度显示出相似的缩短，这表明在日常运动中，MG 肌可以在新的机械设置下有效发挥作用。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Journal of Electromyography and Kinesiology 医学-康复医学

CiteScore

4.70

自引率

8.00%

发文量

审稿时长

74 days

期刊介绍： Journal of Electromyography & Kinesiology is the primary source for outstanding original articles on the study of human movement from muscle contraction via its motor units and sensory system to integrated motion through mechanical and electrical detection techniques. As the official publication of the International Society of Electrophysiology and Kinesiology, the journal is dedicated to publishing the best work in all areas of electromyography and kinesiology, including: control of movement, muscle fatigue, muscle and nerve properties, joint biomechanics and electrical stimulation. Applications in rehabilitation, sports & exercise, motion analysis, ergonomics, alternative & complimentary medicine, measures of human performance and technical articles on electromyographic signal processing are welcome.