重复汽车驾驶踏板动作对老年人神经输出的影响

IF 2 4区 医学 Q3 NEUROSCIENCES
Shun Kunugi , Aleš Holobar , Akira Nakagoshi , Kyosuke Kawabe , Kohei Watanabe
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引用次数: 0

摘要

了解老年人控制踏板位置角度的能力,并研究是否可以通过练习提高这种能力,可能有助于预防交通事故。本研究旨在调查重复练习对老年人在汽车踏板操作过程中踏板位置变化和神经驱动力的影响。13 名老年人和 11 名年轻人进行了 105 次(21 组 × 5 次重复)跖屈肌收缩的踏板角度控制任务。对肱三头肌进行了高密度表面肌电图记录。利用持续活跃的运动单元活动计算出作为神经驱动力的累积尖峰列车。在第一组中,老年人的角度变异系数(1.47 ± 1.06 %)高于年轻人(0.41 ± 0.21 %),而在最后一组中,仅老年人的角度变异系数提高到 0.67 ± 0.51 %。老年人和年轻人的神经驱动变异性没有明显差异。我们的研究结果表明,重复训练可提高老年人的角度稳定性。然而,这种效果无法用神经输出来解释,因为神经输出是由持续活跃的低阈值运动单元估算的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of repetition of a car-driving pedal maneuver and neural output in older adults

Understanding the ability of older adults to control pedal position angle and investigating whether this ability can be enhanced through practice may contribute to the prevention of traffic accidents. This study aimed to investigate repetitive effects on variability of the pedal position and neural drive during car-pedal operation in older adults. Thirteen older and 11 young adults performed 105 (21 sets × 5 repetitions) pedal angle control tasks with plantar flexor contraction. High-density surface electromyograms were recorded of triceps surae muscles. A cumulative spike train as a neural drive was calculated using continuously active motor unit activities. The coefficient of variation of the angle was higher in older (1.47 ± 1.06 %) than young (0.41 ± 0.21 %) adults in the first sets, and improved to 0.67 ± 0.51 % in the final sets in older adults only. There was no significant difference in neural drive variability between older and young adults. Our results suggest that repetition improves angular steadiness in older adults. However, this effect could not be explained by neural output which is estimated from lower threshold motor units that are continuously active.

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来源期刊
CiteScore
4.70
自引率
8.00%
发文量
70
审稿时长
74 days
期刊介绍: Journal of Electromyography & Kinesiology is the primary source for outstanding original articles on the study of human movement from muscle contraction via its motor units and sensory system to integrated motion through mechanical and electrical detection techniques. As the official publication of the International Society of Electrophysiology and Kinesiology, the journal is dedicated to publishing the best work in all areas of electromyography and kinesiology, including: control of movement, muscle fatigue, muscle and nerve properties, joint biomechanics and electrical stimulation. Applications in rehabilitation, sports & exercise, motion analysis, ergonomics, alternative & complimentary medicine, measures of human performance and technical articles on electromyographic signal processing are welcome.
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