探索残余四肢肌肉激活和结构,以改善假肢控制
概括
截肢者显示肌肉缩,但保留神经肌肉功能. 然而,它们在选择性肌肉激活和强度控制方面存在困难,
科学领域:
- 生物力学
- 假肢
- 康复工程
背景情况:
- 剩余的肢体肌肉功能对于基于电肌图 (EMG) 的假肢控制至关重要.
- 了解肌肉的结构和功能是优化假肢功能的关键.
研究的目的:
- 研究TTA残留腿部肌肉的结构和功能性质.
- 评估肌肉激活模式,协同收缩和调节精度,以改善假肢控制.
主要方法:
- 超声波测量了静止和收缩期间的肌肉厚度 (前肌,长肌,中胃肌,后肌).
- 表面电磁波测试评估了肌肉激活,同时收缩和次最大收缩精度 (25%, 50%, 75% MVC).
主要成果:
- 与健康四肢相比,截肢四肢的显著肌肉缩 (p < 0. 0001).
- 所有肌肉都显示神经肌肉活动保持,在收缩过程中增加厚度 (p<0.0001),特别是腹肌 (23. 7%).
- 显而易见的高协同收缩 (例如,TA-PL) 和肌肉差异化,影响了选择性激活和强度调节的准确性.
结论:
- TTA具有剩余的肌肉激活能力,但在选择性控制和精确的强度调节方面面临挑战.
- 研究结果强调需要有针对性的康复和先进的假肢控制策略来提高功能结果.
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