Effects of inspiratory muscle strength and inspiratory resistance on neck inspiratory muscle activation during controlled inspirations
Effects of inspiratory muscle strength and inspiratory resistance on neck inspiratory muscle activation during controlled inspirations
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受控吸气期间吸气肌力量和吸气阻力对颈部吸气肌激活的影响
DOI：
10.1113/ep087247
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发表时间：
2019
影响因子：
2.7
通讯作者：
Yoshitake Yasuhide
中科院分区：
文献类型：
--
作者：
Washino Sohei;Mankyu Hirotoshi;Kanehisa Hiroaki;Mayfield Dean L.;Cresswell Andrew G.;Yoshitake Yasuhide
新发现这项研究的中心问题是什么？什么因素影响吸气时颈部吸气肌激活的开始和强度？主要发现是什么及其重要性？通过表面肌电图测量，吸气时胸锁乳突肌和斜角肌的恢复与最大吸气压力密切相关。这一结果表明，肌肉的恢复取决于个体产生吸气压力的能力。颈部吸气肌肌电图活动的表面测量可能补充目前用于呼吸相关疾病筛查的测试。摘要本研究的目的是：(1)探讨颈部吸气肌收缩开始时间与吸气肌力量之间的关系；（ii）阐明吸气阻力对特定流量吸气时颈部吸气肌激活的影响以及对特定肺容量的影响。通过最大吸气压力（MIP）和最大吸气流量（PFR）测量健康参与者的吸气肌肉力量。随后，参与者在有或没有人工吸气阻力的情况下，尽可能以PFR的20%至100%的目标吸气流量吸气。在强制肺活量（FVC）在20%至50%之间每增加10%，在每个目标流速下，通过表面电极测量胸锁乳突肌和斜角肌的肌电活动（EMGRMS）。每块肌肉的重新招募开始时间由每肺体积的PFR-EMGRMScurves百分比（%FVC）确定。最后，对MIP和每%FVC下每块肌肉的再招募开始进行线性回归分析。无吸气阻力时再招募发作与MIP有显著相关性（r < 0.60，P< 0.040）。具体来说，较低的MIP与较早的肌肉恢复（即以较低的流速恢复）有关，尤其是胸锁乳突肌（r> 0.75，P< 0.005）。在给定流速下，当吸气阻力增加时，两颈部吸气肌的恢复也更早（P= 0.002）。这些结果表明，颈部吸气肌的募集和激活取决于吸气肌的力量和吸气阻力。
New FindingsWhat is the central question of this study?What factors influence the onset and magnitude of activation of the neck inspiratory muscles during inspiration?What is the main finding and its importance?Recruitment of the sternocleidomastoid and scalene muscles during inspiration, measured by means of surface EMG, was strongly correlated with maximal inspiratory pressure. This result indicates that muscle recruitment depends on the capacity of an individual to generate inspiratory pressure. Surface measurements of neck inspiratory muscle EMG activity might complement tests currently used for the screening of respiratory‐related disease.AbstractThe aims of the present study were as follows: (i) to examine the relationship between the onset of recruitment of the neck inspiratory muscles and inspiratory muscle strength; and (ii) to clarify the effect of inspiratory resistance on neck inspiratory muscle activation during inspiration at specific flow rates and to specific lung volumes. Inspiratory muscle strength, as indicated by maximal inspiratory pressure (MIP), and peak inspiratory flow rate (PFR) were measured in healthy participants. Subsequently, participants inspired at target inspiratory flow rates between 20 and 100% of PFR as closely as possible, with and without artificial inspiratory resistance. Electromyographic activity (EMGRMS) of the sternocleidomastoid and scalene muscles was measured from surface electrodes at each target flow rate for each 10% increment of forced vital capacity (FVC) between 20 and 50% of FVC. Recruitment onset for each muscle was determined from %PFR–EMGRMScurves at each lung volume (%FVC). Finally, linear regression analyses were performed for MIP and recruitment onset for each muscle at each %FVC. Recruitment onset during inspiration without inspiratory resistance was strongly correlated with MIP (r> 0.60,P< 0.040). Specifically, a lower MIP was associated with earlier muscle recruitment (i.e. recruitment at a lower flow rate), especially for the sternocleidomastoid muscle (r> 0.75,P< 0.005). Recruitment of both neck inspiratory muscles at a given flow rate was also earlier when inspiratory resistance was added (P= 0.002). These results indicate that the recruitment and activation of the neck inspiratory muscles depends on both inspiratory muscle strength and inspiratory resistance.
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影响因子：
5.5
作者：
Hudson, Anna L.;Gandevia, Simon C.;Butler, Jane E.
通讯作者：
Butler, Jane E.
影响因子：
3
作者：
Sohei Washino;H. Kanehisa;Y. Yoshitake
通讯作者：
Y. Yoshitake
影响因子：
6.8
作者：
AKAIKE, H
通讯作者：
AKAIKE, H
长时间肌腱振动后，跖屈力的波动会减少。
影响因子：
3.3
作者：
Y. Yoshitake;M. Shinohara;M. Kouzaki;T. Fukunaga
通讯作者：
T. Fukunaga
影响因子：
2.3
作者：
Hudson, Anna L.;Joulia, Fabrice;Butler, Jane E.
通讯作者：
Butler, Jane E.