Delayed fatigue in finger flexion forces through transcutaneous nerve stimulation
Delayed fatigue in finger flexion forces through transcutaneous nerve stimulation
复制标题
通过经皮神经刺激延迟手指屈曲力的疲劳
DOI：
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发表时间：
2018
影响因子：
4
通讯作者：
Xiaogang Hu
中科院分区：
文献类型：
--
作者：
Henry Shin;Ryan Chen;Xiaogang Hu
objective.手的虚弱是限制独立生活的主要障碍。神经肌肉电刺激（NMES）是帮助恢复肌肉力量的常用方法。直接在肌肉上的传统NMES经常导致肌肉疲劳的快速发作。在这项研究中，我们调查了力量的可持续性手指屈肌使用经皮神经刺激的方法。approach.手指屈曲力和高密度肌电图（HD EMG）信号，而电刺激施加到尺神经和正中神经束通过刺激网格上的近端臂段。刺激也被施加到手指屈肌肌腹的运动点为目标，作为对照条件。两种刺激方法产生的力最初匹配，随后用5分钟的连续刺激诱导肌肉疲劳。对力的衰减率和EMG振幅进行量化，并对持续收缩期间肌肉激活的空间分布进行评估。主要结果。近端神经刺激方法诱导的衰减较慢的力量和肌电图，在运动点的刺激相比。引起的肌肉激活的空间分布表明，近端神经刺激导致分布激活的内在和外在的手指屈肌肌肉，也激活了更广泛的区域内的外在肌肉。意义我们的研究结果表明，刺激近端神经束可以引起持续的力输出和延迟的力下降率的下降。这可能是由于与传统的运动点刺激相比，肌肉纤维的空间分布激活。我们的神经刺激方法的未来发展可能会在康复或辅助期间延长使用时间，以获得更好的功能结果。
Objective. Weakness of the hand is a major impairment which limits independent living. Neuromuscular electrical stimulation (NMES) is a common approach to help restore muscle strength. Traditional NMES directly over the muscle often leads to a rapid onset of muscle fatigue. In this study, we investigated the force sustainability of finger flexor muscles using a transcutaneous nerve stimulation approach. Approach. Finger flexion forces and high-density electromyogram (HD EMG) signals were obtained while electrical stimulation was applied to the ulnar and median nerve bundles through a stimulation grid on the proximal arm segment. Stimulation was also applied to the finger flexor muscle belly targeting the motor point, serving as a control condition. The force produced from the two stimulation approaches were initially matched, and muscle fatigue was subsequently induced with 5 min of continuous stimulation. The rate of decay of the force and EMG amplitude were quantified, and the spatial distribution of the muscle activation during the sustained contraction was also evaluated. Main results. The proximal nerve stimulation approach induced a slower decay in both force and EMG, compared with the stimulation at the motor point. The spatial distribution of the elicited muscle activation showed that the proximal nerve stimulation led to a distributed activation across the intrinsic and extrinsic finger flexor muscles and also activated a wider area within the extrinsic muscle. Significance. Our findings demonstrated that the stimulation of the proximal nerve bundles can elicit sustained force output and delayed decrease in the rate of force decline. This is potentially due to a spatially distributed activation of the muscle fibers, compared with the traditional motor point stimulation. Future development of our nerve stimulation approach may enable prolonged usage during rehabilitation or assistance for better functional outcomes.
影响因子：
3.2
作者：
BINDERMACLEOD, SA;SNYDERMACKLER, L
通讯作者：
SNYDERMACKLER, L
人体骨骼肌间歇性电刺激期间疲劳的因素。
DOI：
10.1152/japplphysiol.01010.2001
发表时间：
2002
期刊：
Journal of applied physiology (Bethesda, Md. : 1985)
影响因子：
--
作者：
Russ,DavidW;Vandenborne,Krista;Binder-Macleod,StuartA
通讯作者：
Binder-Macleod,StuartA