Journal of Electromyography and Kinesiology最新文献_第8页

Impact of different ranges of motion in the prone barbell row on muscle excitation 俯卧杠铃排不同运动范围对肌肉兴奋的影响

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-06-09 DOI: 10.1016/j.jelekin.2025.103025

Josef Fischer , Christian Burger , Josefina Manieu Seguel , Coşkun Rodoplu , Florian Kurt Paternoster , Markus Tilp , Andreas Konrad

This study investigated muscle excitation via surface electromyography (sEMG) during different ranges of motion (ROMs) in the prone barbell row. Sixteen resistance-trained males performed a 10-repetition maximum (10RM) across three ROMs: full, upper half, and lower half. Time under tension was standardized at 2 s for both the concentric and eccentric phases. SEMG measurements were taken for the trapezius transversus (TT), rear deltoid (RD), latissimus dorsi (LD) and biceps brachii (BB). Mean sEMG amplitude and peak sEMG amplitude were analyzed. The LD showed significantly higher mean muscle excitation in the upper-half ROM compared to both the lower-half ROM (p < 0.001, d = − 0.59) and full ROM (p < 0.001, d = − 0.58). The TT exhibited significantly lower peak excitation in the upper-half ROM compared to the lower-half ROM (p = 0.042, d = 0.42) and full ROM (p = 0.013, d = 0.54). For the other muscles, no significant difference between the ROMs was found. The effect of ROM during the prone barbell row exercise on muscle excitation was of a medium magnitude only, as well as inconsistent, suggesting that ROM adjustments with standardized time under tension have limited impact on overall muscle activation.

本研究通过表面肌电图（sEMG）研究了俯卧杠铃行不同运动范围（ROMs）时的肌肉兴奋情况。16名受过阻力训练的男性在三个rom中进行了10次最大重复（10RM）：完整，上半部分和下半部分。在拉力下，同心相和偏心相的时间都标准化为2s。肌电图测量斜方肌横肌（TT）、后三角肌（RD）、背阔肌（LD）和肱二头肌（BB）。分析表面肌电信号平均振幅和峰值振幅。LD显示上半部分ROM的平均肌肉兴奋程度明显高于下半部分ROM (p <；0.001, d = - 0.59)和全ROM (p <；0.001, d =−0.58)。与下半部分ROM （p = 0.042, d = 0.42）和全ROM （p = 0.013, d = 0.54）相比，TT在上半部分ROM中表现出明显较低的峰值兴奋。对于其他肌肉，rom之间没有发现显著差异。俯卧杠铃排运动中ROM对肌肉兴奋的影响仅为中等程度，且不一致，这表明在紧张状态下以标准化时间调整ROM对整体肌肉激活的影响有限。

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引用次数: 0

Neural control of human inspiratory muscles. What have we learnt from the study of single motor units? 人体吸气肌的神经控制。我们从单个运动单元的研究中学到了什么？

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-08-01 Epub Date: 2025-06-10 DOI: 10.1016/j.jelekin.2025.103026

Jane E. Butler , Simon C. Gandevia , Anna L. Hudson

This review covers the knowledge gains made about human respiratory neural drive resulting from ∼30 years of single motor unit recordings from human inspiratory muscles. Section 2 illustrates the non-uniformity of output across the various inspiratory motoneurone pools innervating diaphragm, scalene, intercostal, and genioglossus muscle activity during quiet breathing and during voluntary breathing. Section 3 describes the rostrocaudal graded timing and magnitude of respiratory neural drive across the parasternal intercostal and external intercostal muscles, which identified a principle of motoneurone recruitment termed the principle of neuromechanical matching that has been since identified as a principle of motor control more generally. Section 4 focuses on the changes in diaphragm motor unit discharge and morphology in ageing, chronic obstructive pulmonary disease and cervical spinal cord injury, linking increased drive to breathe to the changes in respiratory mechanics, with the intriguing findings that this is not always associated with a cortical contribution to breathing (i.e. change in the central control of breathing). Our studies have revealed an elaborate organisation of respiratory neural drive to the motoneurones to match the anatomical and functional complexity of the muscles themselves.

这篇综述涵盖了关于人类呼吸神经驱动的知识收获，这些知识来自于30年来对人类吸气肌单个运动单元的记录。第2节说明了在安静呼吸和自主呼吸时，支配横膈膜、斜角肌、肋间肌和颏舌肌活动的各种吸气运动神经元池输出的不均匀性。第3节描述了横过胸骨旁肋间肌和外肋间肌的呼吸神经驱动的背侧分级时间和大小，其中确定了运动神经元招募的原则，称为神经机械匹配原则，该原则已被确定为更普遍的运动控制原则。第4节着重于衰老、慢性阻塞性肺疾病和颈脊髓损伤中膈肌运动单元放电和形态学的变化，将呼吸驱动的增加与呼吸力学的变化联系起来，并发现这并不总是与皮层对呼吸的贡献（即呼吸中枢控制的变化）相关。我们的研究揭示了呼吸神经驱动到运动神经元的复杂组织，以匹配肌肉本身的解剖和功能复杂性。

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引用次数: 0

Impact of repetitive mouse aiming on muscle fatigue and fine motor performance of the distal upper limb 重复瞄准鼠标对上肢远端肌肉疲劳和精细运动能力的影响

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-03-13 DOI: 10.1016/j.jelekin.2025.102992

Garrick N. Forman , Sophia A. Nikitin , Cameron J. Lang , David A. Gabriel , Michael W. Sonne , Aaron M. Kociolek , Michael W.R. Holmes

Gaming is demanding, however, the impact of gaming on muscle fatigue and performance changes is unclear. The purpose of this study was to evaluate muscle fatigue and performance impairments during an extended mouse aiming fatigue protocol. Twenty participants were recruited (8F, 12 M), separated into gaming and non-gaming groups. Surface electromyography was measured from eight muscles of the right distal upper limb. Participants performed a 30-second aiming task using aim training software. The fatiguing protocol involved six, 5-minute bouts of hitting targets in AimLab. To assess muscle fatigue, reference contractions of radial and ulnar deviation (30% max) as well as ratings of perceived fatigue (RPF) were collected throughout the experiment. The wrist extensors produced the greatest levels of muscle activity while aiming a mouse, producing up to 9.3% MVC. No changes in performance measures were observed throughout the experiment. However, significant fatigue of extensors was observed through changes in RPF, mean power frequency, median frequency, and spike shape analysis. Performance metrics indicated no impairments caused by the fatiguing protocol. Changes in EMG characteristics indicate that the wrist extensors became significantly fatigued through prolonged mouse aiming, indicating the extensors may be prone to gaming related fatigue and injury.

游戏要求很高，然而，游戏对肌肉疲劳和表现变化的影响尚不清楚。本研究的目的是评估延长小鼠瞄准疲劳方案期间的肌肉疲劳和表现障碍。招募了20名参与者（8F, 12 M），分为游戏组和非游戏组。测量右上肢远端8块肌肉的表面肌电图。参与者使用瞄准训练软件完成了一个30秒的瞄准任务。这项令人疲惫的计划包括六到五分钟的在AimLab中击中目标的回合。为了评估肌肉疲劳，在整个实验过程中收集了桡骨和尺侧偏差的参考收缩（最大30%）以及感知疲劳评分（RPF）。当瞄准老鼠时，手腕伸肌产生了最高水平的肌肉活动，产生了高达9.3%的MVC。在整个实验过程中，没有观察到性能指标的变化。然而，通过RPF、平均工频、中位数频率和尖峰形状分析，可以观察到伸肌的明显疲劳。性能指标表明，疲劳协议没有造成损害。肌电图特征的变化表明，由于长时间的鼠标瞄准，手腕伸肌变得明显疲劳，表明伸肌可能容易出现与游戏相关的疲劳和损伤。

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引用次数: 0

The effects of plantar surface stimulation on neuromuscular responses during standing balance and gait in healthy and clinical populations: A systematic review 足底表面刺激对健康和临床人群站立平衡和步态时神经肌肉反应的影响：系统综述

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-04-02 DOI: 10.1016/j.jelekin.2025.103007

Megan Trotman , Phuong L. Ha , Kylie Tucker , Thomas Cattagni , Anna L. Hatton

Enhanced sensory input applied to the plantar surface of the feet, through innovative sensory-stimulating footwear devices, has the potential to improve standing balance and gait. However, the underlying mechanisms by which sensory-stimulating footwear devices bring about their effects on balance and gait remain unclear: changes in neuromuscular control are one possible option. This systematic review aimed to synthesize the effects of enhanced plantar surface stimulation, via footwear, shoe inserts, or floor surfaces, on neuromuscular responses during standing balance and walking gait in healthy and clinical populations. Four databases were selected to identify studies of plantar stimulation devices designed to alter neuromuscular responses during balance or gait. 2773 articles were screened for eligibility based on title and abstract. Thereafter, 37 articles underwent full text review, of which 17 articles were included in the review. The evidence that enhanced plantar sensory stimulation alters muscle activity during standing balance is limited, and during gait is moderate. The effects of sensory-stimulating footwear devices also appear to be dependent on factors such as the target population, the location of the sensory stimuli under the foot, or the complexity of the postural or walking task.

通过创新的感觉刺激鞋类设备，增强的感觉输入应用于脚底表面，有可能改善站立平衡和步态。然而，感觉刺激鞋类设备对平衡和步态影响的潜在机制尚不清楚：神经肌肉控制的改变是一种可能的选择。本系统综述旨在综合通过鞋类、鞋垫或地板表面增强足底表面刺激对健康和临床人群站立平衡和步行步态时神经肌肉反应的影响。选择了四个数据库来确定设计用于改变平衡或步态时神经肌肉反应的足底刺激装置的研究。根据标题和摘要筛选2773篇文章。此后，对37篇文章进行了全文审查，其中17篇文章被纳入审查。加强足底感觉刺激改变站立平衡时肌肉活动的证据是有限的，在步态时是中等的。感觉刺激鞋类设备的效果似乎也取决于目标人群、脚下感觉刺激的位置、姿势或行走任务的复杂性等因素。

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引用次数: 0

Does the rate of hip abductor and adductor muscle activation during weight transfer influence voluntary lateral stepping in chronic stroke? 体重转移过程中髋外展肌和内收肌的激活率是否影响慢性卒中患者的随意外侧行走？

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-03-26 DOI: 10.1016/j.jelekin.2025.103003

Shabnam Lateef, Marcel Bahia Lanza, Vicki L. Gray

People with chronic stroke (PwCS) suffer from impaired lateral weight transfer, resulting in a loss of balance. The primary purpose of this study was to examine how stroke impairs the rate of hip abductor-adductor muscle activation during weight transfer compared to controls, and whether this influences subsequent stepping performance. The secondary purpose was to determine how stroke affects bilateral coordinated hip abductor-adductor muscle activity between the step and stance legs. 20 PwCS (61.6 ± 7.4 years, 4F/16 M) and 10 healthy controls (64.8 ± 8.9 years, 5F/5M) were included. Participants took a voluntary lateral step, as quickly as possible, in response to a light cue. Bilateral Adductor Longus (ADD) and Gluteus Medius (GM) rate of muscle activation (RoA) were measured using electromyography, and spatiotemporal step characteristics were measured using motion capture. Paretic (p < 0.01) and non-paretic (p < 0.01) stance and step legs had a reduced GM and ADD RoA during weight transfer compared to controls. Reduced stance and step GM and ADD RoA were associated with longer weight transfer and step initiation times (r_s = − 0.47 to – 0.63, p < 0.001). PwCS had a lack of bilateral coordinated GM and ADD activity (p > 0.05). Post-stroke reductions in GM and ADD RoA contribute to altered step characteristics.

慢性中风（PwCS）患者的侧身重量转移受损，导致失去平衡。本研究的主要目的是研究与对照组相比，中风如何影响体重转移过程中髋外展-内收肌的激活率，以及这是否会影响随后的步进表现。次要目的是确定中风如何影响双侧步腿和站立腿之间协调的髋关节外展-内收肌活动。纳入20例PwCS（61.6±7.4岁，4F/16 M）和10例健康对照（64.8±8.9岁，5F/5M）。参与者在灯光的提示下，尽可能快地主动采取横向动作。采用肌电法测量双侧长内收肌（ADD）和臀中肌（GM）的肌肉激活率（RoA），采用动作捕捉法测量时空步长特征。轻瘫(p <；0.01)和非父母(p <；与对照组相比，体重转移过程中站立和步腿的GM和ADD RoA降低。减少的姿态和步数GM和ADD RoA与较长的体重转移和步数起始时间相关(rs = - 0.47至- 0.63,p <；0.001)。PwCS缺乏双边协调的GM和ADD活动(p >；0.05)。卒中后GM和ADD RoA的减少有助于改变步特征。

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引用次数: 0

Depth sensor technology in facial movement analysis: A comparative evaluation with marker-based motion analysis 深度传感器技术在面部运动分析：与基于标记的运动分析的比较评价

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-03-26 DOI: 10.1016/j.jelekin.2025.103005

Beste Yilmaz, Umut Ozsoy, Yilmaz Yildirim, Ege Alkan

Objective

This study evaluates the reliability and agreement of depth sensor technology compared to marker-based motion analysis for facial movement assessment. Depth sensors, such as the Kinect-V2, offer a non-invasive alternative, but their accuracy in facial kinematics remains uncertain.

Method

100 healthy participants (50 male, 50 female) performed six facial movements— opening −mouth, smiling, eyebrow-lifting, forced-eye-closure, whistling, and frowning. These were recorded simultaneously using a marker-based motion system and a Kinect-V2 depth sensor. Data were analyzed for asymmetry, intra-method reliability using intraclass correlation coefficients (ICC), and agreement via Bland-Altman analysis.

Results

Bland-Altman analysis showed mean biases for facial movements: opening-mouth (−0.99), smiling (2.7), eyebrow-lifting (−1.85), forced-eye-closure (−1.77), whistling (11.59), and frowning (20.82). Mean asymmetry values using the marker-based system vs. depth sensor: smiling (8.16%vs.4.22%), eyebrow-lifting (7.32%vs.6.88%), eye-closure (8.42%vs.5.39%), and frowning (11.50vs.13.86%). ICC values ranged from 0.41 (forced-eye-closure) to 0.80 (eyebrow lifting) for the marker-based system and 0.61 (forced-eye-closure) to 0.85 (mouth opening) for the depth sensor.

Conclusions

While depth sensors show strong intra-method reliability, they demonstrate biases and broader limits of agreement for subtle expressions. Further algorithmic improvements are needed for clinical applications.

目的评价深度传感器技术与基于标记的运动分析在面部运动评估中的可靠性和一致性。深度传感器，如Kinect-V2，提供了一种非侵入性的替代方案，但它们在面部运动学方面的准确性仍不确定。方法100名健康受试者（男50名，女50名）进行张嘴、微笑、举眉、强迫闭眼、吹口哨和皱眉等6种面部动作。使用基于标记的运动系统和Kinect-V2深度传感器同时记录这些数据。分析数据的不对称性，使用类内相关系数（ICC）分析方法内可靠性，并通过Bland-Altman分析进行一致性分析。结果bland - altman分析显示面部运动的平均偏差：张嘴（- 0.99）、微笑（2.7）、抬眉（- 1.85）、强迫闭眼（- 1.77）、吹口哨（11.59）和皱眉（20.82）。使用基于标记的系统与深度传感器的平均不对称值：微笑（8.16%vs.4.22%）、抬眉（7.32%vs.6.88%）、闭眼（8.42%vs.5.39%）和皱眉（11.50% vs.13.86%）。基于标记的系统的ICC值范围为0.41（强制闭眼）至0.80（抬眉），深度传感器的ICC值范围为0.61（强制闭眼）至0.85（张嘴）。虽然深度传感器显示出很强的方法内可靠性，但它们对细微表情的一致性存在偏见和更大的限制。临床应用需要进一步的算法改进。

{"title":"Depth sensor technology in facial movement analysis: A comparative evaluation with marker-based motion analysis","authors":"Beste Yilmaz, Umut Ozsoy, Yilmaz Yildirim, Ege Alkan","doi":"10.1016/j.jelekin.2025.103005","DOIUrl":"10.1016/j.jelekin.2025.103005","url":null,"abstract":"<div><h3>Objective</h3><div>This study evaluates the reliability and agreement of depth sensor technology compared to marker-based motion analysis for facial movement assessment. Depth sensors, such as the Kinect-V2, offer a non-invasive alternative, but their accuracy in facial kinematics remains uncertain.</div></div><div><h3>Method</h3><div>100 healthy participants (50 male, 50 female) performed six facial movements— opening −mouth, smiling, eyebrow-lifting, forced-eye-closure, whistling, and frowning. These were recorded simultaneously using a marker-based motion system and a Kinect-V2 depth sensor. Data were analyzed for asymmetry, intra-method reliability using intraclass correlation coefficients (ICC), and agreement via Bland-Altman analysis.</div></div><div><h3>Results</h3><div>Bland-Altman analysis showed mean biases for facial movements: opening-mouth (−0.99), smiling (2.7), eyebrow-lifting (−1.85), forced-eye-closure (−1.77), whistling (11.59), and frowning (20.82). Mean asymmetry values using the marker-based system vs. depth sensor: smiling (8.16%vs.4.22%), eyebrow-lifting (7.32%vs.6.88%), eye-closure (8.42%vs.5.39%), and frowning (11.50vs.13.86%). ICC values ranged from 0.41 (forced-eye-closure) to 0.80 (eyebrow lifting) for the marker-based system and 0.61 (forced-eye-closure) to 0.85 (mouth opening) for the depth sensor.</div></div><div><h3>Conclusions</h3><div>While depth sensors show strong intra-method reliability, they demonstrate biases and broader limits of agreement for subtle expressions. Further algorithmic improvements are needed for clinical applications.</div></div>","PeriodicalId":56123,"journal":{"name":"Journal of Electromyography and Kinesiology","volume":"82 ","pages":"Article 103005"},"PeriodicalIF":2.0,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143759586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corrigendum to “Limb and sex-related differences in knee muscle co-contraction exist 3 months after anterior cruciate ligament reconstruction” [J. Electromyogr. and Kines. 66 (2022) 102693] “前交叉韧带重建后3个月膝关节肌肉共收缩存在肢体和性别相关差异”的更正[J]。Electromyogr。和Kines. 66 (2022) 102693]

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-03-29 DOI: 10.1016/j.jelekin.2025.103002

Abdulmajeed Alfayyadh , Kelsey Neal , Jack R. Williams , Ashutosh Khandha , Kurt Manal , Lynn Snyder-Mackler , Thomas S. Buchanan

引用次数: 0

Impact of age on muscle and kinematic responses to an obstacle trip while walking 年龄对肌肉的影响和行走时对障碍的运动反应

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-03-19 DOI: 10.1016/j.jelekin.2025.102993

Steven Phu , Daina L Sturnieks , Stephen R Lord , Yoshiro Okubo

Introduction

This study examined the impact of age on muscle and kinematic responses to an obstacle trip while walking.

Materials and Methods

102 older (65–90 years) and 26 young (21–35 years) people were unexpectedly tripped using a pop-up obstacle that contacted their left foot while walking on an 8-m walkway. Kinematics and lower limb muscle responses during the first and second recovery steps were measured.

Results

Following a trip, older people more often lowered their tripped foot before the obstacle and fell into the harness, compared to young (P < 0.05). When the tripped foot was immediately lifted over the obstacle, older people showed greater co-contraction of ankle muscles and faster peak activation of plantar-flexors but slower, shorter and lower recovery steps than young (P < 0.01). When the tripped foot was immediately lowered, despite similar muscle responses, older people took shorter and lower steps to clear the obstacle and were less stable than young (P < 0.01).

Conclusions

Lower-limb muscle responses to an obstacle trip in older people may be quick but inefficient (co-contraction), resulting in poorer recovery steps and more falls compared to young people. Exercise interventions should aim to improve muscle capacity and motor skills required to prevent falls following unexpected trips.

本研究考察了年龄对行走障碍时肌肉和运动学反应的影响。材料与方法102名老年人（65-90岁）和26名年轻人（21-35岁）在一条8米长的人行道上行走时，意外地被一个与左脚接触的弹出式障碍物绊倒。在第一和第二恢复步骤测量运动学和下肢肌肉反应。结果：与年轻人相比，老年人在旅行结束后，更经常在障碍物前放下绊倒的脚，掉进安全带里。0.05)。当绊倒的脚立即越过障碍物时，老年人表现出更大的踝关节肌肉共同收缩和更快的足底屈肌峰值激活，但比年轻人更慢，更短，更低的恢复步骤(P <；0.01)。当被绊倒的脚被立即放下时，尽管肌肉反应相似，但老年人清除障碍的步伐更短、更低，而且比年轻人更不稳定(P <；0.01)。结论与年轻人相比，老年人下肢肌肉对障碍绊倒的反应可能是快速而低效的（共收缩），导致恢复步骤较差，摔倒较多。运动干预应旨在提高肌肉能力和运动技能，以防止意外旅行后跌倒。

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引用次数: 0

Training adaptations in magnetomyography 磁断层成像的训练适应性

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-05-02 DOI: 10.1016/j.jelekin.2025.103012

Tim Brümmer , Hongyu Lu , Haodi Yang , Lukas Baier , Christoph Braun , Markus Siegel , Justus Marquetand

Muscle strength training leads to neuromuscular adaptations that can be monitored by electromyography (EMG). In view of new technical possibilities to measure the neuromuscular system via contactless magnetomyography (MMG) using miniaturized quantum sensors (optically pumped magnetometer, OPM), the question arises whether MMG detects similar neuromuscular adaptations compared to EMG. Therefore, we developed an experimental design and a multimodal setup for the simultaneous measurement of EMG, triaxial OPM-MMG, and vigorimetry. As a proof of concept, right biceps brachii muscle activity was recorded during maximal voluntary contraction (MVC) and a 40 % MVC muscle fatigue paradigm over 3 min in 12 healthy, untrained subjects. Measurements were taken before and after a 30-day strength training program, with six subjects undergoing training and six serving as controls. EMG and MMG showed a similar increase in RMS during MVC and fatigue after training (r > 0.9). However, the MMG increase varied by vector component, with the magnetic flux signal along the muscle fibers showing the highest RMS increase. Furthermore, these MMG findings can be visualized three-dimensionally using one OPM, which is not possible with bipolar EMG. This is the first longitudinal MMG study to demonstrate the feasibility of monitoring strength training-induced adaptations over 4 weeks, which highlights the opportunities and challenges of OPM-MMG for contactless neuromuscular monitoring.

肌肉力量训练导致神经肌肉适应，可以通过肌电图（EMG）监测。考虑到使用小型化量子传感器（光泵磁强计，OPM）通过非接触式磁强图（MMG）测量神经肌肉系统的新技术可能性，MMG是否检测到与肌电图相似的神经肌肉适应问题出现了。因此，我们开发了一种实验设计和多模态设置，用于同时测量肌电、三轴OPM-MMG和活力测定。作为概念的证明，在12名健康的未经训练的受试者中，记录了在最大自愿收缩（MVC）和40% MVC肌肉疲劳范式中超过3分钟的右肱二头肌活动。在30天的力量训练计划之前和之后进行测量，其中6名受试者接受训练，6名作为对照组。EMG和MMG显示MVC期间RMS和训练后疲劳相似的增加(r >；0.9)。然而，MMG的增加随矢量分量的不同而不同，沿肌纤维的磁通信号显示最大的RMS增加。此外，这些MMG的发现可以用一个OPM三维可视化，而双相肌电图是不可能的。这是第一个纵向MMG研究，证明了监测力量训练诱导的适应性超过4周的可行性，这突出了OPM-MMG用于非接触式神经肌肉监测的机遇和挑战。

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引用次数: 0

An objective method to quantify elbow flexor spasticity using surface EMG and 3D motion analysis 利用表面肌电图和三维运动分析量化屈肘肌痉挛的客观方法

IF 2 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-06-01 Epub Date: 2025-04-02 DOI: 10.1016/j.jelekin.2025.103004

Mirjam Thielen , Anna Pennekamp , Julia Janine Glaser , Leila Harhaus-Wähner , Ulrich Kneser , Paul Alfred Grützner , Ursula Trinler

Spasticity in the upper extremities, particularly elbow flexor spasticity, significantly impairs motor control. Evaluating the extent of spasticity is crucial for effective therapy planning and assessing treatment outcomes. However, there are currently no accurate and reliable measures to quantify upper extremity spasticity. This study aims to introduce an instrumented assessment method for evaluating elbow flexor spasticity using an integrated approach tailored for spasticity assessment. This clinical study included 17 patients with elbow flexor spasticity (mean age 40 ± 20 years) and 20 arms of 10 healthy adults (mean age 33 ± 8 years). The elbow flexors were passively stretched at low and high velocities, and kinematic data were recorded using 3D motion analysis (U.L.E.M.A. model). Muscle excitations of the biceps brachii were assessed via surface EMG. Outcome parameters included the maximum elbow extension deficit during slow and fast passive stretch, EMG data normalized to maximum voluntary isometric contraction (MVIC) at low and high velocities, and the difference between the two (EMGchange). All outcome parameters showed significant differences (p < 0.05) between patients with elbow flexor spasticity and healthy adults. The proposed instrumented assessment tool is a suitable measurement method for evaluating elbow flexor spasticity.

上肢痉挛，特别是肘关节屈肌痉挛，严重损害运动控制。评估痉挛的程度对于有效的治疗计划和评估治疗结果至关重要。然而，目前还没有准确可靠的方法来量化上肢痉挛。本研究旨在介绍一种评估肘关节屈肌痉挛的仪器评估方法，该方法采用为痉挛评估量身定制的综合方法。本临床研究纳入17例肘关节屈肌痉挛患者（平均年龄40±20岁）和10例健康成人（平均年龄33±8岁）的20臂。以低速和高速被动拉伸肘关节屈肌，并使用3D运动分析（U.L.E.M.A.模型）记录运动学数据。通过表面肌电图评估肱二头肌的肌肉兴奋情况。结果参数包括慢速和快速被动拉伸时肘关节最大伸展缺损，低速和高速时肌电数据归一化为最大自主等距收缩（MVIC），以及两者之间的差异（EMGchange）。所有结局参数均有显著差异(p <；肘关节屈肌痉挛患者与健康成人的差异为0.05)。提出的仪器评估工具是评估肘关节屈肌痉挛的一种合适的测量方法。

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引用次数: 0