Gait & posture最新文献_第3页

Immediate effects of ankle–foot orthosis on gait coordination and kinematics in subacute stroke 踝足矫形器对亚急性中风患者步态协调和运动学的直接影响

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-28 DOI: 10.1016/j.gaitpost.2025.110064

Yeo Joon Yun , Jae Hyeon Park , Min Kyu Jang , Ji Woong Choi , Seong Ho Jang

Background

Ankle–foot orthoses (AFOs) are commonly prescribed after stroke, yet their immediate effects on bilateral hip–knee coordination and joint-specific contributors to functional gains are unclear.

Research question

What are the immediate effects of AFO use on bilateral coordination and joint-level kinematics, and which changes relate to performance gains?

Methods

Forty-eight individuals with subacute stroke (mean age 57.9 ± 13.9 years; 28 men/20 women; FAC median 3.0) performed overground 10-m trials under pre-AFO and immediate post-AFO conditions (no acclimatization); eight had two measurements (56 pre–post sets). A prefabricated semi-rigid AFO (UD-Flex, anterior shell) was fitted on the paretic limb. Seven inertial-measurement units recorded spatiotemporal metrics, phase-specific (stance/swing) peak angles, and hip–knee cyclogram metrics. Condition differences were expressed as Δ = post − pre. Elastic-net selection followed by ordinary least squares identified predictors of Δ velocity, Δ cadence, and Δ hip/knee ROM.

Results

AFO use was associated with a small increase in walking speed (+0.01 m/s; p = 0.01), below MCID, whereas cadence and stride time were unchanged On the paretic limb, swing-phase peak hip flexion (−3.1°), knee flexion (−4.4°), and ankle dorsiflexion (−2.3°) decreased; contralateral peaks showed no significant change. Cyclogram geometry was largely preserved. Predictive models linked faster walking to greater non-paretic hip/knee excursions and paretic-ankle change (adjusted R²=0.36). Cadence related positively to non-paretic knee and paretic hip excursions and negatively to paretic-ankle change.

Significance

AFO use was associated with reduced paretic swing-phase peak flexion and ankle stabilization, coinciding with a modest, sub-MCID speed gain. Findings support training that pairs paretic-ankle stability with non-paretic propulsion, while recognizing the limited clinical magnitude of the immediate effect.

踝关节足矫形器（AFOs）通常在中风后使用，但其对双侧髋关节-膝关节协调和关节特异性功能增强的直接影响尚不清楚。研究问题：使用AFO对双侧协调和关节水平运动学的直接影响是什么？哪些变化与性能提高有关？方法48例亚急性脑卒中患者（平均年龄57.9 ± 13.9岁，男性28人/女性20人，FAC中位数3.0）在afo前和afo后（未适应）条件下进行10米地上试验；8例有2次测量（56组前后测量）。将预制的半刚性AFO （UD-Flex，前壳）安装在患瘫肢体上。七个惯性测量单元记录了时空度量、相位特定（站立/摆动）峰值角度和髋-膝循环度量。条件差异表示为Δ = post−pre。结果使用safo与步行速度的小幅增加相关（+0.01 m/s; p = 0.01），低于MCID，而节奏和步幅时间不变。在麻痹的四肢上，摆动相峰值髋关节屈曲（- 3.1°）、膝关节屈曲（- 4.4°）和踝关节背屈（- 2.3°）下降；对侧峰无明显变化。环形几何在很大程度上被保留了下来。预测模型将更快的步行与更大的非麻痹性髋关节/膝关节运动和麻痹性踝关节变化联系起来（调整后的R²=0.36）。节奏与非麻痹性膝关节和麻痹性髋关节漂移呈正相关，与麻痹性踝关节变化负相关。意义：使用afo可减少家长挥摆阶段的峰值屈曲和踝关节稳定，并伴有适度的、低于mcid的速度增加。研究结果支持将paretic-ankle stability与非paretic- propulsion相结合的训练，同时认识到临床效果有限。

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引用次数: 0

Effects of eight-week backward walking training on mechanical energy flow pattern and Achilles tendon properties in older adults with dynapenia: An exploratory study 八周后走训练对老年运动障碍患者机械能流模式和跟腱特性的影响：一项探索性研究

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-27 DOI: 10.1016/j.gaitpost.2025.110065

Long-Huei Lin , Nai-Wen Hsu , Yun-Lin Tsai , Yi-Ling Peng , Chih-Hsiu Cheng

Background

Dynapenia, an age-related decline in muscle strength despite preserved muscle mass, is associated with reduced walking speed and increased fall risk. Backward walking training involves eccentric activation of the plantar flexors and has been shown to enhance walking performance. This exploratory study evaluated how an eight-week backward walking training program influences lower-limb mechanical energy flow and tendon properties in older adults with dynapenia.

Method

Forty-four older females (> 65 years) were recruited, comprising 21 individuals with dynapenia and 23 older adults as the control group. The dynapenia group underwent backward walking training (3 sessions/week, 30 min/session). Mechanical energy flow, Achilles tendon stiffness, and gait speed were assessed before and after the training. Nonparametric tests were used for statistical analysis (p < 0.05).

Results

At baseline, the dynapenia group exhibited significantly lower segmental energy change rates in the thigh and shank, reduced tendon stiffness and stress, and an altered knee joint energy pattern compared with controls. Following training, no significant changes were observed in mechanical energy flow or tendon properties. Walking speed significantly improved by 10.2 %-19.6 % after training.

Conclusion

Backward walking training improved walking speed in older adults with dynapenia. However, such improvement may be attributed to factors other than tendon adaptation or enhanced energy efficiency, given that no significant changes were detected. These findings provide preliminary insights into the biomechanical response to backward walking and underscore the need for future studies to validate potential training effects.

动力不足是一种与年龄相关的肌肉力量下降，尽管肌肉质量保持不变，但与步行速度降低和跌倒风险增加有关。向后行走训练包括偏心激活足底屈肌，并已被证明可以提高行走性能。本探索性研究评估了为期八周的后退行走训练计划如何影响老年运动障碍患者下肢机械能流和肌腱特性。方法招募44名老年女性（65岁），其中21名运动障碍患者，23名老年人作为对照组。运动障碍组进行倒退行走训练（3次/周，30 分钟/次）。在训练前后评估机械能流、跟腱刚度和步态速度。采用非参数检验进行统计分析（p <； 0.05）。结果在基线上，与对照组相比，运动障碍组在大腿和小腿的节段能量变化率显著降低，肌腱刚度和应力降低，膝关节能量模式改变。训练后，没有观察到机械能流或肌腱特性的显著变化。训练后步行速度显著提高10.2 %-19.6 %。结论后向步行训练可提高老年运动障碍患者的步行速度。然而，鉴于没有发现明显的变化，这种改善可能归因于肌腱适应或能量效率提高以外的因素。这些发现为向后行走的生物力学反应提供了初步的见解，并强调了未来研究验证潜在训练效果的必要性。

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引用次数: 0

Altered muscle synergies in knee osteoarthritis patients during locomotion tasks persist over six-week valgus brace intervention 膝关节骨性关节炎患者在运动任务中肌肉协同作用的改变持续超过6周外翻支架干预

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-22 DOI: 10.1016/j.gaitpost.2025.110062

Lasse Hansen, Jana Rogoschin, Jonas Ebbecke, Igor Komnik, Wolfgang Potthast

Introduction

Knee osteoarthritis (KOA) can alter gait biomechanics and neuromuscular activity. Valgus brace (VB) treatment aims to reduce medial compartment loading. While the mechanical efficacy of VBs is well-documented, their effect on neuromuscular deviations in KOA patients remains unclear. This study assesses the potential of VB to modulate altered muscle synergy activation patterns in KOA patients.

Methodology

Forty participants (twenty KOA, twenty age-matched controls) performed five locomotion tasks: overground walking, ramp and stair ascent / descent. Trials with and without VB were conducted at baseline and after six weeks of regular brace use. Muscle synergies were calculated based on electromyographic data of eight lower limb muscles per side. Inverse dynamics were calculated using marker-based motion capture data. A statistical parametric mapping three-way ANOVA with the factors group affiliation, brace condition, and measurement time point was conducted for each task.

Results

Four synergies were identified across groups, tasks, brace conditions, and time points. The KOA cohort exhibited increased knee flexor synergy activity during early- to mid-stance, increased sagittal trunk flexion, increased hip flexion angles and moments, and decreased knee flexion angles and moments. Brace condition and time point had no effect on synergy activity or sagittal joint moments.

Discussion and conclusion

Persistently increased hip flexion moments in the KOA group, possibly caused by increased sagittal trunk flexion, appeared to drive elevated activity of the biarticular knee flexor synergy. Increased knee flexor synergy activity can result in elevated knee joint contact forces, potentially aggravating KOA progression. Rather than being caused solely by the need for local stability, increased knee flexor synergy activity may be driven by altered trunk dynamics, which remained unaffected throughout the brace intervention.

膝骨关节炎（KOA）可以改变步态生物力学和神经肌肉活动。外翻支具（VB）治疗的目的是减少内侧筋室的负荷。虽然VBs的机械功效已被充分证明，但它们对KOA患者神经肌肉偏差的影响尚不清楚。本研究评估了VB在KOA患者中调节改变的肌肉协同激活模式的潜力。方法：40名参与者（20名KOA， 20名年龄匹配的对照组）执行5项运动任务：地上行走、坡道和楼梯上下。在基线和常规支具使用六周后，使用和不使用VB进行试验。根据每侧8块下肢肌肉的肌电图数据计算肌肉协同作用。利用基于标记的动作捕捉数据计算逆动力学。对每个任务进行统计参数映射的三向方差分析，因子为群体隶属关系、括号条件和测量时间点。结果在小组、任务、支撑条件和时间点之间确定了四种协同效应。KOA组在站立早期至站立中期表现出膝关节屈肌协同活动增加，矢状躯干屈曲增加，髋关节屈曲角度和力矩增加，膝关节屈曲角度和力矩减少。支具条件和时间点对协同活动和矢状关节力矩无影响。讨论与结论KOA组持续增加的髋关节屈曲力矩可能是由于矢状躯干屈曲增加引起的，这似乎推动了双关节膝关节屈肌协同作用的活动升高。膝关节屈肌协同活动的增加可导致膝关节接触力升高，潜在地加重KOA的进展。而不是仅仅由局部稳定性的需要引起的，增加的膝关节屈肌协同活动可能是由改变的躯干动力学驱动的，在整个支架干预过程中都不受影响。

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引用次数: 0

The effect of experimentally-induced gluteal muscle paralysis on joint kinematics, reaction forces and dynamic balance performance during lunges 实验诱导的臀肌麻痹对弓步运动中关节运动学、反作用力和动态平衡性能的影响

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-21 DOI: 10.1016/j.gaitpost.2025.110061

Michel Meisterhans , Dimitris Dimitriou , Marie-Rosa Fasser , Marina Geissmann , Paul Borbas , Armando Hoch , Jan Rosner , Martin Schubert , José A. Aguirre , Urs Eichenberger , Jonas Widmer , Patrick O. Zingg

Introduction

Lunges are commonly used in resistance training and rehabilitation as functional closed kinetic chain exercises. The gluteal muscles play a critical role in stabilizing the hip and pelvis during such movements.

Research question

How does selective experimentally-induced gluteal muscle paralysis affect joint kinematics, joint reaction forces (JRFs), and dynamic balance during lunge performance?

Methods

Ten healthy adults underwent sequential blocks of 1) branch of the superior gluteal nerve to the tensor fasciae latae (SGNtfl) muscle, 2) superior gluteal nerve (SGN), and 3) inferior gluteal nerve (IGN) on the dominant right leg. Participants performed forward lunges under control and post-block conditions. Kinematic data were recorded using a 3D motion capture system, ground reaction forces were collected via dual force plates, and joint reaction forces were estimated using musculoskeletal modeling.

Results

For the affected right leg leading the lunge, SGN and IGN blocks resulted in a significantly higher lunge position (SGN: + 45 mm; IGN: + 33 mm), driven by reduced right knee and ankle flexion and diminished left hip extension. Following the SGN block, pelvic flexion and rotation toward the affected (right) side were observed. JRFs were significantly reduced in the right hip, knee, and ankle (average maximum difference hip: 100 % BW, knee: 200 % BW, ankle: 50 % BW).

Conclusion

Despite altered mechanics and reduced joint loading following selective gluteal paralysis, participants were able to complete the lunge task, even if the lunge position was higher, and compensatory pelvic flexion and rotation towards the affected side occurred.

弓步是一种常用的抗阻训练和康复运动，是一种功能封闭的运动链练习。在这些运动中，臀肌在稳定髋关节和骨盆方面起着关键作用。选择性实验诱导的臀肌麻痹如何影响弓步运动时的关节运动学、关节反作用力（jrf）和动态平衡？方法10例健康成人分别在右腿主侧行1)臀上神经至阔筋膜张肌（SGNtfl）支、2)臀上神经（SGN）和3)臀下神经（IGN）阻滞。参与者在控制和阻滞后条件下进行前弓步。使用3D运动捕捉系统记录运动学数据，通过双力板收集地面反作用力，并使用肌肉骨骼建模估计关节反作用力。结果右膝和踝关节屈曲减少，左髋关节伸展减少，导致右腿弓步的位置明显升高（SGN: + 45 mm; IGN: + 33 mm）。SGN阻滞后，观察骨盆屈曲和向受影响（右）侧旋转。右髋关节、膝关节和踝关节的jrf显著降低（髋部平均最大差异：100 % BW，膝关节：200 % BW，踝关节：50 % BW）。结论：选择性臀肌麻痹后，尽管力学改变，关节负荷减少，参与者仍能完成弓步任务，即使弓步位置较高，代偿性骨盆屈曲和向患侧旋转发生。

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引用次数: 0

Gait speed-dependent foot placement control in persons with chronic stroke and controls 慢性中风患者步态速度依赖性足部放置控制及对照。

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-20 DOI: 10.1016/j.gaitpost.2025.110060

Joost Biere , Brenda E. Groen , Jorik Nonnekes , Noël L.W. Keijsers

Background

The foot placement strategy is the primary mechanism for mediolateral (ML) balance control during gait and often impaired in persons with chronic stroke (PwCS). While healthy adults show precise control across most gait speeds, except very slow speeds, this relationship remains unexplored in PwCS.

Methods

Participants walked on an instrumented treadmill at randomized speeds (0.2 – 1.6 m/s or maximum speed for PwCS). Foot placement deviation, the RMSE between actual and model-fitted foot placements based on CoM position and velocity at initial contact, quantified foot placement control. Best-fitting mixed-effects models (linear, exponential, or quadratic) assessed foot placement deviation across all speeds and, post-hoc, at lower and higher speeds separately.

Results

Data from sixteen PwCS with self-reported balance impairments and 22 controls were analysed. A quadratic model with random intercepts and slopes showed consistently higher deviation across speeds in PwCS. Below 0.8 m/s, deviation decreased linearly (β = –2.19, p < 0.001), without leg or group differences in linear trend or curvature. Above 0.8 m/s, the paretic leg showed a significantly greater increase and curvature (linear β = 1.70, p < 0.001; quadratic β = 0.80, p < 0.001) compared to controls and the non-paretic leg.

Conclusion

Foot placement control exhibits a curvilinear relationship with gait speed in PwCS and controls, with less control at slow speeds in both groups. While PwCS show consistent foot placement control impairments compared to controls across all speeds, paretic impairments increase at higher speeds. These speed-sensitive paretic impairments likely reflect the inability to adapt to increased sensorimotor demands during faster gait.

背景：足部放置策略是步态中外侧（ML）平衡控制的主要机制，并且经常在慢性中风（PwCS）患者中受损。虽然健康成年人对大多数步态速度都表现出精确的控制，但除了非常慢的速度，这种关系在PwCS中仍未被探索。方法：参与者以随机速度（0.2 - 1.6 m/s或PwCS的最大速度）在仪器跑步机上行走。足部放置偏差，即基于初始接触时CoM位置和速度的实际足部放置与模型拟合足部放置之间的RMSE，量化足部放置控制。最佳拟合混合效应模型（线性、指数或二次）评估了所有速度下的足部放置偏差，并在事后分别评估了低速和高速下的足部放置偏差。结果：分析了16例自我报告平衡障碍的PwCS和22例对照组的数据。具有随机截距和斜率的二次模型显示，PwCS的速度偏差始终较高。在0.8 m/s以下，偏差线性减小（β = -2.19, p ）。结论：PwCS组和对照组足部放置控制与步态速度呈曲线关系，两组在慢速时控制较少。与对照组相比，PwCS在所有速度下都表现出一致的足部放置控制障碍，但在更高的速度下，父母的障碍会增加。这些速度敏感的父母损伤可能反映了在更快的步态中无法适应增加的感觉运动需求。

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引用次数: 0

Investigating the effect of foot orthotics on dynamic stability in females with pes planus foot posture 探讨足部矫形器对女性平足足姿势动态稳定性的影响

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-20 DOI: 10.1016/j.gaitpost.2025.110057

Kelly A. Robb , Rachel Tameer, Patrick Crowley, Stephen D. Perry

Background

Foot orthotics, a device which can modify the mechanical interaction between foot and the external environment, are commonly prescribed for individuals with pes planus foot postures. The purpose of this study was to investigate the role of foot orthotics on controlling dynamic stability when females with pes planus foot posture experience a modified foot placement orientation during walking.

Research Question

Can foot orthotics control dynamic stability when females with pes planus foot posture experience a modified foot placement orientation during walking?

Methods

Kinematic data were collected from eighteen healthy young females (21.8 ± 3.2years) walking in prefabricated foot orthotics under three different stepping orientations (level, inversion, eversion). Outcome measures included gait parameters (step length, width, velocity) and dynamic stability (center of mass–base of support (COM-BOS), medio-lateral center of pressure (ML-COP) and antero-posterior COP (AP-COP)). Results were statistically evaluated with a repeated-measures ANOVA by within-subject factors of foot orthotic and step orientation. The relationship between foot posture index and dynamic stability was evaluated with spearman correlations.

Results

Results suggest that changing the orientation of the foot significantly challenges the balance control system, as evidenced by a reduction in step length, increased step width, and increased AP-COP maximums. In orthotics, inverting the foot significantly reduced the COM-BOS range (27.9 mm ± 17.8 mm) and AP COM-COP maximum (265.3 mm ± 26.7 mm), whereas everting the foot increased the AP COM-COP maximum (277.0 mm ± 27.3 mm).

Significance

As the foot becomes more flexible (higher FPI score), the reduction in COM-BOS range suggests an increased balance control resolution when walking in foot orthotics.

足部矫形器是一种可以改变足部与外部环境之间机械相互作用的装置，通常用于患有平足症足部姿势的个体。本研究旨在探讨足部矫形器在女性足部平足姿势改变时对动态稳定性的影响。研究问题：足部矫形器是否能控制女性平足足姿势在行走过程中改变足部放置方向时的动态稳定性？方法收集18名健康年轻女性（21.8 ± 3.2岁）在三种不同的踏步方向（水平、倒置、外翻）下使用预制足矫形器行走的皮肤数据。结果测量包括步态参数（步长、宽度、速度）和动态稳定性（质量中心-基础支撑（COM-BOS）、中外侧压力中心（ML-COP）和前后侧压力中心（AP-COP））。结果采用重复测量方差分析（repeated-measures ANOVA）对受试者内足部矫形和步向因素进行统计评价。用spearman相关法评价足部姿态指数与动态稳定性之间的关系。结果表明，改变足部方向会显著影响平衡控制系统，如步长减少、步宽增加和AP-COP最大值增加。在矫形器中，倒置足可显著降低COM-BOS范围（27.9 mm±17.8 mm）和AP COM-COP最大值（265.3 mm±26.7 mm），而翻足可增加AP COM-COP最大值（277.0 mm±27.3 mm）。随着足部变得更灵活（FPI评分更高），COM-BOS范围的降低表明在使用足部矫形器行走时平衡控制分辨率增加。

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引用次数: 0

Gait quality improves after unilateral subthalamic nucleus deep brain stimulation in Parkinson's disease patients 帕金森病患者单侧丘脑下核深部脑刺激后步态质量改善

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-20 DOI: 10.1016/j.gaitpost.2025.110059

Brandon M. Peoples , Harrison C. Walker , Kenneth D. Harrison , Keven G. Santamaria-Guzman , Silvia E. Campos-Vargas , Damaris C. Cifuentes , Natasha Brooks , Christopher P. Hurt , Jaimie A. Roper

Background

While deep brain stimulation (DBS) of the subthalamic nucleus (STN) is a standard therapy for motor symptoms of Parkinson's disease (PD), its effect on gait is not well established.

Methods

This study investigated gait quality in 28 patients with PD undergoing unilateral STN DBS. Gait assessments were performed preoperatively (OFF and ON levodopa) and at two and four months postoperatively using either conventional ring or directional stimulation (OFF levodopa). The primary outcome was the Enhanced Gait Variability Index (EGVI), a measure of gait quality. Patients were stratified into two subgroups based on their baseline OFF-medication EGVI scores: elevated (n = 12) and normative (n = 16). Statistical analysis utilized 2 × 4 repeated measures ANOVA and Pearson correlations.

Results

A significant group-by-visit interaction was observed for EGVI at both comfortable (p < .001) and maximal (p = .014) walking speeds. The elevated variability group demonstrated significant improvement in gait quality from baseline with levodopa and with both ring and directional stimulation. The normative variability group showed no significant change across conditions. No statistically significant difference was found between ring and directional stimulation. Baseline EGVI was strongly correlated with Timed Up and Go performance (r = .75), PIGD score (r = .74), freezing of gait (r = .60), and balance confidence (r = -.55).

Conclusion

Unilateral STN DBS improves gait quality in PD patients with high baseline gait variability and preserves function in those with normal variability. These findings suggest that quantitative gait analysis may aid in patient selection and set therapeutic expectations for DBS.

虽然丘脑底核深部脑刺激（DBS）是帕金森病（PD）运动症状的标准治疗方法，但其对步态的影响尚未得到很好的证实。方法对28例PD患者行单侧STN DBS的步态质量进行研究。术前（OFF和ON左旋多巴）和术后2个月和4个月分别使用常规环形或定向刺激（OFF左旋多巴）进行步态评估。主要结果是增强步态变异性指数（EGVI），一种步态质量的测量方法。根据基线OFF-medication EGVI评分将患者分为两个亚组：升高（n = 12）和正常（n = 16）。统计分析采用2 × 4重复测量方差分析和Pearson相关。结果在舒适步行速度（p <； .001）和最大步行速度（p = .014）下，EGVI均存在显著的组访交互作用。高变异性组在左旋多巴和环形和定向刺激的基础上显示出步态质量的显著改善。标准变异性组在不同条件下没有显着变化。环形增产与定向增产之间无统计学差异。基线EGVI与Timed Up和Go表现密切相关（r = ）。75)， PIGD评分（r = ）。74)、步态冻结（r = ）。60)，平衡置信度（r = - 0.55）。结论单侧STN DBS改善了基线步态变异性高的PD患者的步态质量，保留了基线步态变异性正常的PD患者的功能。这些发现表明，定量步态分析可能有助于患者选择和设定DBS的治疗预期。

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引用次数: 0

Differentiating gait behaviors between early-stage dementia with Lewy bodies and Parkinson’s disease 早期路易体痴呆与帕金森病步态行为的鉴别

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-19 DOI: 10.1016/j.gaitpost.2025.110034

Karen D.A. Mathias , Arthur E. Casagrande Pinto , Luandrya E. Martins , Elie Matar , Joseph R. Phillips , Simon J.G. Lewis , Kaylena A. Ehgoetz Martens

Introduction

There is a need for improved biomarkers given that differentiating Dementia with Lewy bodies (DLB) from Parkinson’s disease (PD) can be difficult in the earlier stages. Therefore, this study aimed to characterize and evaluate whether gait differences exist between PD and DLB patients in the early course of their disease by assessing normal and dual task walking conditions.

Methods

Twenty-six PD and 20 DLB patients who were within five years of their initial diagnosis and 16 healthy older adults walked across a 6-meter pressure sensor walkway under three conditions (i) self-paced gait, (ii) walking while subtracting 1 s from 100 and (iii) walking while subtracting serial 7 s from 100.

Results

During self-paced gait, DLB patients demonstrated impaired pace (velocity, step length) and rhythm (stance time) compared to early-stage PD patients. Study findings revealed velocity, step length, step time, stance time and step velocity variability offered moderate accuracy for discriminating DLB from PD patients. Increasing cognitive load during dual tasking (serial 1 s vs. serial 7 s) did not expose or intensify any gait differences between PD and DLB.

Conclusion

These findings suggest quantitative gait measurements may be a promising, sensitive, and selective biomarker for differentiating clinical patterns of neurodegeneration. An understanding of early disease gait profiles may also prove useful as a tool for tracking phenoconversion to a synucleinopathy in those prodromal patients who are at high risk, such as those with isolated Rapid Eye Movement Sleep Behavior Disorder.

导言：鉴于在早期阶段很难将路易体痴呆（DLB）与帕金森病（PD）区分，有必要改进生物标志物。因此，本研究旨在通过评估正常和双任务行走条件来表征和评估PD和DLB患者在疾病早期是否存在步态差异。方法：26名PD和20名DLB患者，他们的初始诊断在5年内，16名健康老年人在三种条件下行走6米压力传感器人行道(i)自定步法，（ii）步行时从100中减去1 s，（iii）步行时从100中减去序列7 s。结果：与早期PD患者相比，在自定步步态中，DLB患者表现出步速（速度、步长）和节奏（站立时间）受损。研究结果显示，速度、步长、步时间、站立时间和步速度变异性对鉴别DLB和PD患者具有中等的准确性。在双重任务中增加认知负荷（系列1 s vs系列7 s）不会暴露或加剧PD和DLB之间的任何步态差异。结论：这些发现表明，定量步态测量可能是一种有希望的、敏感的、选择性的生物标志物，可用于区分神经变性的临床模式。对早期疾病步态特征的了解也可能被证明是一种有用的工具，用于跟踪那些高风险的前驱患者向突触核蛋白病的表型转化，例如那些孤立的快速眼动睡眠行为障碍。

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引用次数: 0

Perspectives on interdisciplinary posture and gait research from the ISPGR 2025 World Congress: Where do we stand and what are the next steps? ISPGR 2025世界大会对跨学科姿势和步态研究的看法：我们的立场是什么，下一步是什么？

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-19 DOI: 10.1016/j.gaitpost.2025.110058

Benjamin Filtjens , Christopher McCrum

引用次数: 0

Emotion classification using gait biomechanics and machine learning 基于步态生物力学和机器学习的情绪分类

IF 2.4 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2025-11-16 DOI: 10.1016/j.gaitpost.2025.110055

Angeloh Stout , Justin Macneal Cadenhead , Mrigank Maharana , Ashley Guzman , Macie Kauffman , Katherine G. Brown , Shuo-Hsiu Chang , Yen-Chi Le , Jessica Lee , Gu Eon Kang

Background

Emerging research suggests that emotions alter the way people walk, suggesting gait data may serve as a potential source for emotion recognition. Compared to traditional modalities (i.e., facial expressions, speech), gait-based emotion detection may have advantages, including reduced susceptibility to deliberate manipulation.

Research question

Is it feasible to recognize emotional states using 3D gait biomechanics and machine learning?

Methods

Fifteen healthy young adults participated in this study, performing gait trials while recalling autobiographical memories to elicit five target emotions: anger, sadness, joy, fear, and neutral. Gait biomechanics were recorded using a 3D optoelectronic motion capture system, and 155 biomechanical variables were extracted for analysis. Five machine learning algorithms, K-Nearest Neighbors, Logistic Regression, Random Forest, and Multi-layer Perceptron, and eXtreme Gradient Boosting (XGBoost), were evaluated using Leave-One-Participant-Out cross-validation and Synthetic Minority Over-sampling Technique to handle class imbalance.

Results

Machine learning models classified emotional states (anger, sadness, joy, fear) with accuracy higher than chance (59 % vs. 25 %). XGBoost showed the highest performance (59 % accuracy) using the top 20 biomechanical variables ranked by a decision tree entropy index. Among the emotions, sadness was detected most accurately (66 %).

Significance

Our findings demonstrate that 3D gait analysis combined with machine learning holds promise for an alternative way of emotion recognition. This study may provide foundational evidence supporting the development of tools for the early detection of emotional fluctuations in mental health conditions such as bipolar disorder.

新兴研究表明，情绪会改变人们走路的方式，这表明步态数据可能作为情绪识别的潜在来源。与传统的方式（即面部表情、语言）相比，基于步态的情绪检测可能具有优势，包括减少对故意操纵的敏感性。研究问题：使用3D步态生物力学和机器学习来识别情绪状态是否可行？方法15名健康的年轻人参与了这项研究，在回忆自传式记忆的同时进行步态试验，以引出五种目标情绪：愤怒、悲伤、快乐、恐惧和中性。采用三维光电运动捕捉系统记录步态生物力学，提取155个生物力学变量进行分析。利用留一参与者交叉验证和合成少数派过采样技术，对5种机器学习算法（K-Nearest Neighbors, Logistic Regression, Random Forest, Multi-layer Perceptron, eXtreme Gradient Boosting, XGBoost）进行了评估。结果机器学习模型对情绪状态（愤怒、悲伤、快乐、恐惧）进行分类的准确率高于随机（59 % vs. 25 %）。使用由决策树熵指数排序的前20个生物力学变量，XGBoost表现出最高的性能（59 %的准确率）。在情绪中，悲伤被检测得最准确（66% %）。我们的研究结果表明，结合机器学习的3D步态分析有望成为情感识别的另一种方式。这项研究可能为开发早期检测双相情感障碍等心理健康状况情绪波动的工具提供基础证据。

{"title":"Emotion classification using gait biomechanics and machine learning","authors":"Angeloh Stout , Justin Macneal Cadenhead , Mrigank Maharana , Ashley Guzman , Macie Kauffman , Katherine G. Brown , Shuo-Hsiu Chang , Yen-Chi Le , Jessica Lee , Gu Eon Kang","doi":"10.1016/j.gaitpost.2025.110055","DOIUrl":"10.1016/j.gaitpost.2025.110055","url":null,"abstract":"<div><h3>Background</h3><div>Emerging research suggests that emotions alter the way people walk, suggesting gait data may serve as a potential source for emotion recognition. Compared to traditional modalities (i.e., facial expressions, speech), gait-based emotion detection may have advantages, including reduced susceptibility to deliberate manipulation.</div></div><div><h3>Research question</h3><div>Is it feasible to recognize emotional states using 3D gait biomechanics and machine learning?</div></div><div><h3>Methods</h3><div>Fifteen healthy young adults participated in this study, performing gait trials while recalling autobiographical memories to elicit five target emotions: anger, sadness, joy, fear, and neutral. Gait biomechanics were recorded using a 3D optoelectronic motion capture system, and 155 biomechanical variables were extracted for analysis. Five machine learning algorithms, K-Nearest Neighbors, Logistic Regression, Random Forest, and Multi-layer Perceptron, and eXtreme Gradient Boosting (XGBoost), were evaluated using Leave-One-Participant-Out cross-validation and Synthetic Minority Over-sampling Technique to handle class imbalance.</div></div><div><h3>Results</h3><div>Machine learning models classified emotional states (anger, sadness, joy, fear) with accuracy higher than chance (59 % vs. 25 %). XGBoost showed the highest performance (59 % accuracy) using the top 20 biomechanical variables ranked by a decision tree entropy index. Among the emotions, sadness was detected most accurately (66 %).</div></div><div><h3>Significance</h3><div>Our findings demonstrate that 3D gait analysis combined with machine learning holds promise for an alternative way of emotion recognition. This study may provide foundational evidence supporting the development of tools for the early detection of emotional fluctuations in mental health conditions such as bipolar disorder.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"124 ","pages":"Article 110055"},"PeriodicalIF":2.4,"publicationDate":"2025-11-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145569788","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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