四肢体形态在前十字带撕裂后6至60个月
Justin M Losciale1,2,3,4,5, Bruce Lin6, Marine Theret6
1Department of Physical Therapy, Faculty of Medicine, University of British Columbia, Vancouver, Canada.
Scandinavian journal of medicine & science in sports
|July 19, 2025
概括
与对照组相比,前十字带 (ACL) 撕裂的个体显示膝盖延伸器强度和扭矩发展速度降低. 然而,四头肌肉形态,包括巨大的横侧肌纤维大小和组成,在受伤和未受伤的个体之间仍然相似.
科学领域:
- 整形外科 整形外科 整形外科
- 运动医学 运动医学
- 肌肉生理学 肌肉生理学
背景情况:
- 前十字带 (ACL) 撕裂显著影响下肢功能和力量.
- 了解四头四肢形态后的ACL损伤对于康复和性能恢复至关重要.
- 之前的研究表明力量缺陷,但肌肉结构的适应性需要进一步研究.
研究的目的:
- 为了比较四头肌形态,特别是巨大的横向肌肉,在第一次ACL撕裂和未受伤的对照人群之间.
- 研究肢体和群体之间的肌肉纤维截面积 (fCSA),纤维类型比例和细胞外矩阵面积的潜在差异.
- 为了将肌肉形态与膝盖延伸器的强度和扭矩发展速度 (RTD) 相关联.
主要方法:
- 探索性横截面研究设计.
- 参与者 (19-35岁) 首次 ACL 撕裂 (6-60 个月损伤后) 和年龄匹配的无损伤的对照.
- 双边膝盖延伸器强度和RTD评估,随后进行双边横向巨大的肌肉活检以进行组织学分析.
主要成果:
- 与ACL组相比,没有受伤的对照组表现出明显更大的膝盖延伸器同心强度,偏心强度和RTD.
- 在巨大的横向肌肉纤维类型的特定横截面积 (fCSA) 中没有发现显著的群体间或四肢间差异.
- 在ACL和对照组之间的肌肉纤维类型比例或细胞外矩阵区域中没有发现显著差异.
结论:
- 尽管在ACL撕裂后,肌肉性能 (强度和RTD) 的可测量的缺陷,四头肌形态 (巨大的横向fCSA,纤维类型和细胞外矩阵) 与未受伤的个体没有显著差异.
- 这些发现表明,强度减弱可能源于受伤后6至60个月的大侧肌结构肌肉变化以外的因素.
- 进一步的研究应该探索神经适应或其他因素导致ACL损伤后的力量缺陷.
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