Journal of Electromyography and Kinesiology最新文献_第5页

Assessment of common electrode placement methods for surface electromyography recordings of the triceps surae muscles 三头肌表面肌电记录常用电极放置方法的评估。

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-10-24 DOI: 10.1016/j.jelekin.2025.103080

Daan De Vlieger , Liese Bosman , Eva Swinnen , Manuela Besomi , Jeroen Aeles

Introduction

In surface electromyography, optimal electrode placement is critical. Various techniques are available for placing the electrodes appropriately, yet these are rarely assessed for accuracy, especially for electrode placement away from neighboring muscles considering the large variation in individual muscle morphology. This study evaluated triceps surae electrode placement using SENIAM recommendations and expert palpation, relative to anatomical muscle boundaries.

Methods

Electrodes were placed on the medial gastrocnemius (MG), lateral gastrocnemius (LG), and soleus of twenty-four participants following SENIAM guidelines and expert muscle palpation. Ultrasound was used to calculate the distances between electrodes and muscle boundaries at rest and during fixed-end plantar flexion at two intensities, in both plantar flexion and dorsiflexion positions.

Results

SENIAM placed the electrodes laterally (electrode-boundary distance: 0.7 ± 0.9 cm) and the expert more centrally (distance to lateral boundary: 4.1 ± 0.9 cm; medial boundary: 3.0 ± 0.9 cm) on the LG. In four participants, SENIAM placements were positioned outside the LG muscle boundary. In soleus, SENIAM placements were close to the tibial border (0.7 ± 0.4 cm). For MG, both methods performed well.

Conclusion

This study highlights limitations of the SENIAM placement protocol for the LG and soleus, and supports the use of individualized approaches to improve electrode accuracy and enhance the validity of EMG recordings.

在表面肌电图中，最佳电极放置是至关重要的。有多种技术可用于适当地放置电极，但很少评估其准确性，特别是考虑到个体肌肉形态的巨大差异，电极放置在远离邻近肌肉的地方。本研究评估三头肌表面电极放置使用SENIAM建议和专家触诊，相对于解剖肌肉边界。方法：24名参与者按照SENIAM指南和专家肌肉触诊将电极置于腓肠肌内侧（MG）、腓肠肌外侧（LG）和比目鱼肌上。超声用来计算电极和肌肉边界之间的距离在静止和固定端足底屈曲在两种强度，在足底屈曲和背屈位置。结果：SENIAM将电极侧向放置（电极边界距离0.7±0.9 cm），专家电极更集中放置（距离外侧边界4.1±0.9 cm，内侧边界3.0±0.9 cm）在LG上。在4名参与者中，SENIAM放置在LG肌边界之外。在比目鱼肌，SENIAM放置位置靠近胫骨边界（0.7±0.4 cm）。对于MG，两种方法都表现良好。结论：本研究强调了SENIAM放置方案在LG和比目鱼肌上的局限性，并支持使用个性化的方法来提高电极的准确性和增强肌电记录的有效性。

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引用次数: 0

Co-contraction about the ankle increases with the threat of a walking perturbation 踝关节的共同收缩随着行走干扰的威胁而增加

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-11-09 DOI: 10.1016/j.jelekin.2025.103082

Nancy T. Nguyen , James B. Tracy , Jeremy R. Crenshaw

The ability to prevent a fall after a walking perturbation is dependent upon the initial, modifiable conditions related to stability. Individuals may proactively modify their gait to maintain stability by increasing co-contraction about the ankle, increasing the resistance to a perturbing force. The purpose of this study was to investigate whether such proactive ankle co-contraction occurs when walking under the threat of large perturbations. Participants walked on a computer-controlled treadmill under nine randomly ordered task conditions with combinations of three walking speeds and three perturbation conditions. Bilateral EMG of the tibialis anterior and medial gastrocnemius were recorded. Co-contraction indices (CCI) of these muscles during stance prior to a perturbation were calculated. The effects of walking perturbation condition and speed on CCI were assessed using a 3x3 repeated-measures ANOVA. There were no significant interactions of perturbation and speed. There was a significant main effect of perturbation condition, with higher CCI in anterior and posterior perturbations compared to no perturbation. These results suggest that co-contraction occurs in a manner that may increase resistance to perturbations. Future studies will determine the extent to which populations with a high risk of falling are able to proactively modify their gait in anticipation of a perturbation.

行走扰动后防止跌倒的能力取决于与稳定性相关的初始、可修改的条件。个体可能会主动调整步态，通过增加踝关节的共同收缩来保持稳定，增加对干扰力的抵抗力。本研究的目的是调查在大扰动的威胁下行走时是否会发生这种主动踝关节共同收缩。参与者在电脑控制的跑步机上行走，在九种随机排序的任务条件下，分别有三种行走速度和三种干扰条件。记录双侧腓肠肌前、内侧肌肌电图。计算摄动前这些肌肉的共收缩指数（CCI）。采用3 × 3重复测量方差分析评估行走扰动条件和速度对CCI的影响。微扰和速度之间没有显著的相互作用。摄动条件的主效应显著，前后摄动的CCI高于无摄动的CCI。这些结果表明，共收缩的发生方式可能会增加对扰动的抵抗力。未来的研究将确定跌倒风险高的人群能够在多大程度上主动调整他们的步态，以应对干扰。

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引用次数: 0

Establishing a methodological framework for evaluating gait symmetry through muscle synergies: A pilot study 通过肌肉协同作用建立评估步态对称性的方法学框架：一项试点研究

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-09-10 DOI: 10.1016/j.jelekin.2025.103064

Elham Zargaripour, Farzad Towhidkhah, Farnaz Ghassemi, Otella Shoja

Gait symmetry is vital for stable locomotion, yet conventional metrics often yield inconsistent results. Muscle synergy analysis provides a more precise understanding of neural mechanisms behind symmetric gait. A clear methodology is essential to distinguish true inter-limb differences from natural variability. This study aimed to refine the analysis of muscle synergy symmetry in healthy individuals by incorporating intra-limb similarity as a baseline for comparison, while also including muscle weightings within each synergy to explore muscle synchrony. EMG signals were collected from both lower limbs of healthy subjects during treadmill walking. Muscle synergies were extracted using non-negative matrix factorization (NMF). Intra-limb similarity was used as a baseline to assess inter-limb differences. Muscle activity, number of synergies, muscle weightings within each synergy, and weight (W) and activation coefficients (H) were compared between sides. Normalized scalar products assessed weight coefficients, while Pearson’s correlation was used to compare activation coefficients. No significant differences were found in the number or structure of muscle synergies between limbs, indicating symmetrical coordination. However, significant differences were observed in activation of four of eight muscles and minor variations in muscle weightings. This study underscores the importance of a robust framework for interpreting muscle synergy symmetry.

步态对称对于稳定的运动至关重要，然而传统的指标往往产生不一致的结果。肌肉协同分析为对称步态背后的神经机制提供了更精确的理解。要区分真正的肢间差异和自然变异，明确的方法至关重要。本研究旨在通过将肢体内相似性作为比较基线，同时还包括每个协同作用中的肌肉权重，以探索肌肉同步，从而完善健康个体肌肉协同对称性的分析。采集健康受试者在跑步机上行走时的双下肢肌电信号。使用非负矩阵分解（NMF）提取肌肉协同作用。采用肢内相似性作为评估肢间差异的基线。比较两侧的肌肉活性、协同作用数量、每个协同作用内的肌肉重量、体重(W)和激活系数(H)。归一化标量积评估权重系数，而皮尔逊相关性用于比较激活系数。四肢间肌肉协同作用的数量和结构均无显著差异，说明四肢间肌肉协同作用是对称的。然而，8块肌肉中有4块的激活程度有显著差异，肌肉重量也有细微变化。这项研究强调了解释肌肉协同对称性的强大框架的重要性。

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引用次数: 0

Peaks or threshold-crossing: A comparative analysis of neuromuscular jitter measurement methods 峰值或阈值交叉：神经肌肉抖动测量方法的比较分析

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-09-09 DOI: 10.1016/j.jelekin.2025.103065

César Valle , Armando Malanda , Oscar Garnés-Camarena , Daniel.W. Stashuk , Gurutzi Azkona , Javier Rodríguez-Falces , Javier Navallas

Introduction

Commercial electromyographic recording systems usually include two different methods for jitter measurement, based on peaks or threshold-crossing. There is reported evidence that the measurements obtained with both methods from discharges recorded with concentric needle electrodes offer comparable results, but this evidence is scarce. This study aimed to replicate such studies and extract conclusions related to the use of the two methods.

Methods

129 EMG recordings were obtained from 12 patients using concentric needle electrodes (0.02 mm²), filtered at 1000 Hz and oversampled to 200 kHz. The recordings were aligned using either peak or threshold-crossing methods. Jitter was measured using both methods and obtained as mean consecutive differences (MCD). Statistical analyses included Anderson-Darling, Wilcoxon, and linear regression tests.

Results

Of the 129 recordings, 49 (38 %) were excluded for presenting contaminated waveforms. MCD values were similar in the two methods, with a median difference of −0.92 µs. The Wilcoxon test confirmed this difference (p = 0.0002). The regression yielded a high coefficient of determination (R² = 0.994) and a slope of 0.989.

Conclusion

No significant differences were found between the two jitter measurement methods. Variations were only a few µs, not enough to affect pathological jitter diagnosis. Both methods are valid for clinical use.

商业肌电记录系统通常包括两种不同的抖动测量方法，基于峰值或阈值交叉。有报道的证据表明，用两种方法从同心针电极记录的放电中获得的测量结果可提供可比的结果，但这一证据很少。本研究旨在重复此类研究，并提取与使用这两种方法相关的结论。方法采用同心圆针电极（0.02 mm2）采集12例患者的129张肌电图，1000 Hz滤波，200 kHz过采样。使用峰值或阈值交叉方法对记录进行对齐。用两种方法测量抖动，并获得平均连续差（MCD）。统计分析包括安德森-达林检验、Wilcoxon检验和线性回归检验。结果129份记录中，49份（38%）因出现污染波形而被排除。两种方法的MCD值相似，中位差为- 0.92µs。Wilcoxon检验证实了这一差异（p = 0.0002）。回归的决定系数较高（R2 = 0.994），斜率为0.989。结论两种抖动测量方法无显著差异。变化仅为几µs，不足以影响病理性抖动诊断。两种方法均可用于临床。

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引用次数: 0

Sex-specific effects of fatiguing handgrip plus blood flow restriction on upper limb neuromuscular characteristics during a repetitive shoulder height task 重复性肩高任务中疲劳握力加血流限制对上肢神经肌肉特征的性别特异性影响。

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-09-10 DOI: 10.1016/j.jelekin.2025.103069

Carson Graham, Pruthvi Patel, Julie N. Côté

Blood flow restriction (BFR) aims to accelerate reperfusion post-effort and could provide benefits after shoulder fatiguing work. However, sex-specific effects of localized BFR on whole-limb features are unknown. Ten females and eleven males performed three 30-second repetitive pointing tasks (RPTs) (pre-fatigue, post-fatigue, and recovery). The fatiguing protocol was an intermittent submaximal handgrip task performed until failure to meet the target force (50% of maximum grip strength). Participants completed two sessions: without BFR and with 50% BFR applied to the upper arm during the handgrip task. Electromyography was recorded during the handgrip and each RPT. Muscle thickness (ultrasound), and arm circumferences were recorded after each RPT sequence. Time-to-fatigue was unaffected by condition or sex. Females exhibited greater forearm electromyography amplitude and greater decreases in flexor carpi radialis and brachioradialis median power frequency (MdPF). Post-fatigue, forearm circumference and muscle thickness increased significantly in both sexes. Females demonstrated greater forearm muscle thickness changes, while males showed more consistent increases in biceps brachii thickness under BFR. During the RPTs, males displayed significant increases in MdPF of middle deltoid and pectoralis major, while females showed persistent fatigue effects in forearm muscles. Results suggest that sex differences exist in whole-limb mechanisms of fatigue and BFR adaptations.

血流限制（BFR）旨在加速运动后的再灌注，并可在肩部疲劳工作后提供益处。然而，局部BFR对全肢特征的性别特异性影响尚不清楚。10名女性和11名男性进行了3个30秒的重复性指指任务（rpt）（疲劳前、疲劳后和恢复）。疲劳方案是一个间歇性的次最大握力任务，直到未能达到目标力（最大握力的50%）。参与者完成了两个阶段：在握力任务中，上臂不使用BFR，上臂使用50% BFR。记录握力和每次RPT时的肌电图。每次RPT后记录肌肉厚度（超声）和手臂周长。疲劳时间不受条件或性别的影响。女性表现出更大的前臂肌电振幅和更大的桡侧腕屈肌和肱桡肌中功频率（mpf）的下降。疲劳后，男性和女性的前臂周长和肌肉厚度均显著增加。在BFR下，女性表现出更大的前臂肌肉厚度变化，而男性表现出更一致的肱二头肌厚度增加。在rpt过程中，男性中三角肌和胸大肌的mpf显著增加，而女性前臂肌肉持续疲劳。结果表明，全肢疲劳机制和BFR适应存在性别差异。

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引用次数: 0

Young and older adult females show increased muscle compensation compared to males while moving an external load for three functional tasks 与男性相比，年轻和年长的成年女性在进行三种功能任务的外部负荷时，肌肉补偿有所增加

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-10-27 DOI: 10.1016/j.jelekin.2025.103078

Zoe M. Moore , Joshua Pataky , Lilla Caton , Mitchell Vanden Heuvel , Sean Furlong , Ashlie Miller , Meghan E. Vidt

Rotator cuff tears (RCT) are common. Prior work studied effects of RCT severity, load, and task on functional performance, but no work has examined the combined effect of factors or age- and sex-based effects, which was the objective of this study. Models representing young/older adult males/females with varying RCT severity were used. Seven external loads were applied to the hand during 3 functional tasks. Multiple 2-way ANOVAs and exploratory mixed effects model were used to determine muscle force differences between RCT severity, external load, sex, age, and task. Root mean squared error (RMSE) was used to quantify hand deviation. The deltoid, pectoralis major, infraspinatus, and teres minor muscles increased force for interactions of RCT severity, external load, age, sex, and task and the following main effects: RCT severity (all p < 0.0043), external load (all p < 0.0001), female sex (all p < 0.0001), age (all p < 0.0214), and multi-planar tasks (all p < 0.0001). Larger force contributions occurred for female/older adults with increased RCT severity/external load. Greatest hand deviation occurred for massive tear severity, 66.7 N load for all model permutations (all RMSE > 0.0077 m), with greater deviation for multi-planar vs planar tasks. Study outcomes aid in development of sex, age, and RCT severity specific rehabilitation that incorporates multi-planar movement.

肩袖撕裂（RCT）是常见的。先前的工作研究了RCT严重程度、负荷和任务对功能表现的影响，但没有工作检查了因素的综合影响或年龄和性别的影响，这是本研究的目的。模型代表不同RCT严重程度的年轻/老年成年男性/女性。在3个功能任务中，手被施加了7个外部负载。采用多重双因素方差分析和探索性混合效应模型来确定RCT严重程度、外负荷、性别、年龄和任务之间的肌力差异。用均方根误差（RMSE）来量化手部偏差。三角肌、胸大肌、冈下肌和小圆肌在RCT严重程度、外部负荷、年龄、性别和任务的相互作用下增加了力量，主要影响如下：RCT严重程度（均p <； 0.0043）、外部负荷（均p <； 0.0001）、女性性别（均p <； 0.0001）、年龄（均p <； 0.0214）和多平面任务（均p <； 0.0001）。在RCT严重程度/外负荷增加的女性/老年人中，力的贡献更大。最大的手偏差发生在大规模撕裂严重程度，所有模型排列的66.7 N负载（所有RMSE >； 0.0077 m），多平面与平面任务的偏差更大。研究结果有助于性别、年龄和RCT严重程度特异性康复的发展，包括多平面运动。

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引用次数: 0

Greater distal excitation of the biceps femoris long head reflects proximodistal differences in motor unit action potential properties 股骨长头二头肌远端更大的兴奋反映了运动单位动作电位特性的近端和远端差异

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-09-02 DOI: 10.1016/j.jelekin.2025.103053

José Carlos dos Santos Albarello , Hélio V. Cabral , Francesco Negro , Liliam Fernandes de Oliveira

Evidence on regional muscle excitation within hamstrings remains controversial, primarily because information derived solely from surface electromyograms (sEMG) amplitude does not necessarily provide an accurate estimate of neural drive to the muscle. To address this limitation, this study investigated whether there are proximodistal differences in motor unit properties of the biceps femoris long head during isometric hip extension and knee flexion tasks. Seventeen resistance-trained males performed isometric knee flexion and hip extension tasks at 20 % and 40 % of maximal voluntary contraction. High-density sEMG were recorded from proximal and distal regions of the biceps femoris long head and decomposed into individual motor units. Central motor unit and action potential properties were analyzed. Bipolar sEMG amplitude was also calculated for each region to simulate traditional sEMG measurements. Bipolar sEMG amplitude, motor unit action potential amplitude and conduction velocity were significantly greater in the distal region during both tasks. In contrast, no proximodistal differences were observed in central motor unit properties. These findings suggest that increased bipolar sEMG amplitude in the distal region of the biceps femoris long head is driven by motor unit action potential properties rather than differences in central modulation, likely influenced by intra-muscular variations in muscle mechanics and geometry.

腘绳肌区域肌肉兴奋的证据仍然存在争议，主要是因为仅从表面肌电图（sEMG）振幅获得的信息不一定能准确估计肌肉的神经驱动。为了解决这一局限性，本研究调查了在等距髋关节伸展和膝关节屈曲任务中，股二头肌长头的运动单元特性是否存在近端和远端差异。17名接受阻力训练的男性在20%和40%的最大自愿收缩时进行等距膝关节屈曲和髋关节伸展任务。从股骨二头长头近端和远端记录高密度肌电图，并将其分解为单个运动单元。分析了中枢运动单元和动作电位特性。还计算了每个区域的双极表面肌电信号振幅，以模拟传统的表面肌电信号测量。双极表面肌电信号振幅、运动单位动作电位振幅和传导速度在远端区均显著增大。相比之下，在中枢运动单元特性上没有观察到近端和远端差异。这些发现表明，在股二头肌长头远端区域增加的双极表面肌电信号振幅是由运动单元动作电位特性驱动的，而不是由中枢调节的差异驱动的，这可能受到肌肉力学和几何形状的肌肉内部变化的影响。

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引用次数: 0

Inter-limb neuromuscular activity of the gastrocnemius muscle during unilateral and bilateral explosive jumps and relationship with jump performance 单侧和双侧爆发性跳跃时腓肠肌的肢间神经肌肉活动及其与跳跃表现的关系。

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-10-12 DOI: 10.1016/j.jelekin.2025.103074

Ana Ferri-Caruana , Joaquín Martín Marzano-Felisatti , Carlos Sendra-Pérez , Jose Ignacio Priego-Quesada

Understanding the neuromuscular demands of explosive tasks is essential for enhancing performance and reducing injury risk. This study analyzed inter-limb activation of the medial and lateral gastrocnemius during take-off and landing phases of bilateral and unilateral countermovement jumps (CMJ) and horizontal jumps (HJ), examining its relationship with inter-limb asymmetry and performance. Twenty-six physically active participants performed CMJ and HJ tasks while bilateral surface electromyography was recorded from both gastrocnemius heads. Jump performance was evaluated using flight time (CMJ) and distance (HJ), and asymmetry indices were computed between dominant and non-dominant limbs. Results showed significantly greater muscle activity during take-off than landing across all conditions (p < 0.05). During CMJ landings, the medial gastrocnemius was more active than the lateral, with no activation differences found between unilateral and bilateral jumps. A moderate positive correlation was observed between CMJ performance and bilateral take-off asymmetry (r = 0.43, p = 0.02). Conversely, greater activation in the non-dominant gastrocnemius was negatively associated with performance in both CMJ and HJ (r = –0.39 to –0.48, p < 0.05). In conclusion, gastrocnemius muscles display phase-specific activation patterns. Moderate asymmetry during take-off may benefit performance, while excessive activation in the non-dominant limb may reflect compensatory strategies detrimental to jump efficiency.

了解爆炸性任务的神经肌肉需求对于提高表现和减少受伤风险至关重要。本研究分析了在双侧和单侧反动作跳跃（CMJ）和水平跳跃（HJ）起降阶段腓肠肌内侧和外侧的肢间激活，探讨了其与肢间不对称和表现的关系。26名体力活动的参与者执行CMJ和HJ任务，同时记录双侧腓肠肌头的表面肌电图。用飞行时间（CMJ）和距离（HJ）评价跳跃性能，计算优势肢和非优势肢之间的不对称指数。结果显示，在所有条件下，起飞时的肌肉活动明显大于降落时的肌肉活动

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引用次数: 0

Changes in knee joint angle affect to a negligible extent the distribution of motor points—the motor zones—in the quadriceps muscles 膝关节角度的变化对股四头肌运动点（运动区）分布的影响可以忽略不计。

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-10-15 DOI: 10.1016/j.jelekin.2025.103073

Matias Fröhlich , Alessandra Rizza , Rodrigo Osorio , Marco Aurélio Vaz , Brian Andrews , Giacinto Luigi Cerone , Alberto Botter , Taian Martins Vieira

Purpose

Functional electrical stimulation (FES) has been documented to provide invaluable, therapeutic effect. The success of FES applications relies on the positioning of stimulation electrodes closely to the muscle motor points. During joint movement, however, motor points may shift as the muscle length changes. Using an objective procedure to define motor points, we assessed how much and how relevantly knee extensors’ motor point location changes with joint angle. Methods: Current pulses were applied over 121 (11 × 11) equally spaced stimulation sites, determined according to the size and boundaries of the three superficial knee extensors of 17 healthy subjects. Five consecutive monophasic pulses (100 µs, 1pps) were delivered at each site for two knee joint angles (40° and 115°) and two intensities (120 % of motor threshold and maximum tolerable). The average peak torque greater than 60 % of the maximum torque was used to identify motor points across sites. The centroid of motor point clusters—motor zones—was considered to assess motor point displacement and peak torque for different knee joint angles. Results: Significant centroid shifts were observed distally (2.5 % displacement; p < 0.031) and medially (4.4 % shift; p < 0.021), representing ∼ 1 cm shifts in both directions, when going from 40° to 115° of knee flexion. Mean differences in peak torque between joint angles were negligible, however, amounting to less than 2 % of maximal voluntary torque. Conclusion: The displacement of quadriceps motor points with knee position changes is of negligible practical relevance for justifying a variable position of stimulation electrodes in FES protocols.

目的：功能性电刺激（FES）已被证明提供了宝贵的治疗效果。FES应用的成功依赖于刺激电极靠近肌肉运动点的位置。然而，在关节运动过程中，运动点可能随着肌肉长度的变化而移动。使用客观的程序来定义运动点，我们评估了膝关节伸肌运动点位置随关节角度变化的程度和相关程度。方法：根据17名健康受试者的3个膝关节浅表伸肌的大小和边界，在121 （11 × 11）个等间隔的刺激点上施加电流脉冲。在两个膝关节角度（40°和115°）和两个强度（运动阈值和最大可耐受值的120%）的每个部位连续传递5个单相脉冲（100µs, 1pps）。平均峰值转矩大于最大转矩的60%，用于识别跨站点的电机点。考虑了运动点簇的质心-运动区域-来评估不同膝关节角度下的运动点位移和峰值扭矩。结果：在远端观察到明显的质心移动（2.5%的位移）；p结论：四头肌运动点的位移与膝关节位置的变化对于FES方案中可变刺激电极位置的合理性的实际相关性可以忽略不计。

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引用次数: 0

Relationship between knee muscle activation and morphological changes in the infrapatellar fat pad in patients with knee osteoarthritis during gait 膝关节骨性关节炎患者步态中膝关节肌肉激活与髌下脂肪垫形态变化的关系。

IF 2.3 4区医学 Q3 NEUROSCIENCES

Journal of Electromyography and Kinesiology

Pub Date : 2025-12-01 Epub Date: 2025-10-23 DOI: 10.1016/j.jelekin.2025.103076

Kexin Zhu , Yosuke Ishii , Akinori Nekomoto , Goki Kamei , Riko Okinaka , Takato Hashizume , Kohei Matsumura , Miharu Sugimoto , Minoru Toriyama , Yuko Nakashima , Makoto Takahashi , Nobuo Adachi

The infrapatellar fat pad (IFP) plays a role in the mechano-pathology of patients with knee osteoarthritis (OA), and its morphological changes during walking may serve as an indicator for detecting the condition. However, the effects of knee muscle activation on IFP morphology during walking in patients with knee OA remain unclear. This study investigated the relationship between muscle activation and morphological changes in the IFP during walking in patients with knee OA. Twenty-two patients with knee OA were enrolled in this cross-sectional study. IFP thickness and kinematic and kinetic data were measured during walking using ultrasound imaging and a three-dimensional motion analysis system. The activities of the quadriceps and hamstring muscles were recorded simultaneously, and muscle co-contraction indices were calculated. No correlation was found between quadriceps activation and IFP parameters. By contrast, a significant negative correlation was observed between morphological changes in the IFP and lateral muscle co-contraction during the stance phase. These results suggest that co-contraction of knee muscles involves poor IFP dynamics during walking, potentially playing a role in the development of mechano-pathological changes in patients with knee OA.

髌下脂肪垫（IFP）在膝关节骨性关节炎（OA）患者的机械病理学中起着重要作用，其在行走过程中的形态变化可以作为检测病情的指标。然而，膝关节骨性关节炎患者行走时膝关节肌肉激活对IFP形态的影响尚不清楚。本研究探讨了膝关节OA患者行走时肌肉激活与IFP形态学变化之间的关系。22例膝关节OA患者参与了这项横断面研究。使用超声成像和三维运动分析系统测量行走过程中IFP的厚度以及运动学和动力学数据。同时记录股四头肌和腘绳肌的活动，计算肌肉共收缩指数。股四头肌激活与IFP参数之间没有相关性。相反，站姿期IFP形态学变化与侧肌共收缩呈显著负相关。这些结果表明，膝关节肌肉的共同收缩涉及行走时IFP动力学不良，可能在膝关节OA患者的机械病理变化发展中发挥作用。

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引用次数: 0