在脊髓肌肉缩患者的呼吸耐力测试期间,呼吸肌肉活动和疲劳反应
Kim Kant-Smits1, Lisa Pomp1, Laura E Habets2
1Child Development and Exercise Center, Wilhelmina Children's Hospital, University Medical Center Utrecht, the Netherlands.
概括
在脊髓肌肉缩 (SMA) 中,隔膜在呼吸耐力测试中表现出稳定的活动,但显著疲劳. 辅助肌肉变得更加可变,没有明显的疲劳迹象.
科学领域:
- 神经肌肉疾病 神经肌肉疾病
- 呼吸系统生理学 呼吸系统生理学
- 电动肌图学 电动肌图学
背景情况:
- 脊椎肌肉缩 (SMA) 影响运动神经元,导致肌肉逐渐衰弱.
- 呼吸道肌肉衰弱是SMA发病率和死亡率的主要原因.
- 了解炼期间呼吸道肌肉功能对于管理SMA患者至关重要.
研究的目的:
- 在SMA患者的呼吸耐力测试 (RET) 中调查呼吸肌肉活动和疲劳.
- 在持续的呼吸任务中,区分隔膜与辅助吸入肌肉的反应.
主要方法:
- 55名患有SMA类型2和3的参与者接受了不同强度的RET.
- 表面电肌图 (sEMG) 记录了隔膜,肋间间和骨肌肉活动.
- 呼吸道肌肉疲劳 (RMF) 被定义为无法完成60次呼吸.
主要成果:
- 隔膜在测试开始时表现出较低的活动变异,与肋间肌肉和骨肌肉相比.
- 经历RMF的参与者表现出隔膜疲劳,其证据是振幅和中位频率下降.
- 辅助吸气肌没有显示明显的疲劳的电生理学迹象.
结论:
- 隔膜在SMA中在RET期间在更高强度下保持稳定的活动,但疲劳.
- 辅助肌肉表现出增加的可变性,缺乏明确的疲劳指标.
- 这项研究增强了对SMA呼吸道肌肉功能和疲劳能力的理解.
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