Gait & posture最新文献_第9页

Anticipatory postural adjustments for reaching and lifting an object from the floor 伸手从地上举起物品时的预期姿势调整

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.08.041

P. Di Florio , M. Sicbaldi , L. Palmerini , A. Silvani , L. Chiari

引用次数: 0

Physiological rotation patterns of the thoracolumbar spine across different ages: A detailed analysis using upright CT 不同年龄段胸腰椎的生理旋转模式：使用直立 CT 进行详细分析。

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.10.005

Ryo Mizukoshi , Mitsuru Yagi , Yoshitake Yamada , Yoichi Yokoyama , Minoru Yamada , Kota Watanabe , Masaya Nakamura , Takeo Nagura , Masahiro Jinzaki

Background

The rotational motion of the spine plays a crucial role in daily activities. Understanding the mechanisms of spinal rotation is essential for evaluating normal spinal function, especially in standing positions due to the influence of gravity. However, previous studies on spinal rotation have been limited.

Research Question

What are the differences in thoracolumbar rotation during trunk rotation in a standing position among different age and gender groups?

Methods

This cross-sectional study involved 49 healthy volunteers without back pain, including 24 younger participants (13 males, 11 females) and 25 elderly participants (12 males, 13 females). Upright and trunk-rotated CT (right-rotated standing positions) scans were taken. Vertebral rotation was measured using the femoral head center as an axis.

Results

Analysis of spinal alignment in the standing position revealed mild rotation from the lumbar to thoracic vertebrae. The lumbar spine exhibited left rotation at apex of L3 (L3: −1.3±3.8°, p=0.01), while the lower thoracic spine showed right rotation at apex of T8 (T8: 1.9±2.4°, p<0.001) and the upper thoracic spine showed left rotation at apex of T3 (T3: −2.6±2.9°, p<0.001). The lumbar spine showed minimal rotation during maximum trunk rotation, with significant rotation noted above T10 (16 % vs 84 %). The total thoracolumbar spinal rotation at T1 showed significant differences by gender and age (male vs. female: 23.9±° vs. 30.3±°, p=0.001; young vs. elderly: 29.2±° vs. 25.0±°, p=0.028; elderly male vs. elderly female: 19.2±° vs. 30.4±°, p<0.001). Younger participants did not show significant gender differences, while elderly females retained more rotation compared to males.

Significance

This pioneering study provides the first detailed report on the range of spinal rotation in a physiological standing situation, highlighting significant differences by gender and age. These findings offer new insights into the natural patterns of spinal rotation and their potential implications for diagnosing and treating spinal disorders.

背景：脊柱的旋转运动在日常活动中起着至关重要的作用。了解脊柱旋转的机制对于评估正常的脊柱功能至关重要，尤其是在受重力影响的站立姿势下。然而，以往有关脊柱旋转的研究非常有限：研究问题：在站立姿势下旋转躯干时，不同年龄和性别群体的胸腰椎旋转有何差异？这项横断面研究涉及 49 名无背痛的健康志愿者，包括 24 名年轻参与者（13 名男性，11 名女性）和 25 名老年参与者（12 名男性，13 名女性）。研究人员进行了直立和躯干旋转 CT（右旋站立位）扫描。以股骨头中心为轴测量椎体旋转：结果：对站立姿势下脊柱排列的分析表明，从腰椎到胸椎都有轻度旋转。腰椎在 L3 顶点处显示左旋（L3：-1.3±3.8°，p=0.01），而下胸椎在 T8 顶点处显示右旋（T8：1.9±2.4°，p意义重大：这项开创性的研究首次详细报告了生理站立情况下脊柱旋转的范围，突出显示了不同性别和年龄的显著差异。这些发现为脊柱旋转的自然模式及其对诊断和治疗脊柱疾病的潜在影响提供了新的见解。

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引用次数: 0

The Gait Outcomes Assessment List (GOAL) questionnaire: Test-retest reliability and validity in children with cerebral palsy in Türkiye 步态结果评估表 (GOAL) 问卷：土耳其脑瘫儿童的重复测试可靠性和有效性。

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.10.009

Umut Apaydın , Unni Narayanan , Rabia Zorlular , Hatice Adıgüzel , Ramazan Yıldız , Ayşe Yıldız , Erkan Erol , Yasemin Apaydın , Bülent Elbasan

Background

Most questionnaires provide little information about children's or parents' views on functioning and do not attempt to understand their priorities or expectations. The Gait Outcomes Assessment List (GOAL) questionnaire was developed to fill this gap by identifying the most important goals of the patient and family for a gait intervention.

Research question

To investigate the test-retest reliability and concurrent and discriminant validity of the GOAL questionnaire in children with cerebral palsy (CP) in Türkiye.

Methods

In this study, we included 81 children with CP aged 5–18 years and their families. The parent and child version 5.0 of the GOAL was used. Standardized item, domain and total (across all domains) GOAL scores were calculated for each participant. Test-retest reliability was assessed with the intraclass correlation coefficient (ICC). The Gillette Functional Assessment Questionnaire (FAQ) was used for validation.

Results

The mean age of the children was 10.4 ± 3.3 years (range 5–18), and 64.2 % were boys. The test–retest reliability was excellent for the GOAL-Child and GOAL-Parent total GOAL scores (ICC: 0.97 for the child and ICC: 0.96 for the parent). All standard errors of measurement (SEMs) for domain scores and total scores were fewer than 20 points. The children's total scores on the GOAL questionnaire showed a significant difference between the GMFCS levels (p <0.001). The parents’ total scores on the GOAL questionnaires also showed a significant difference between the GMFCS levels (p <0.001). There were moderate positive correlations between the GOAL child and parent questionnaire total scores and the FAQ walking level according to Spearman’s rho (GOAL child and FAQ walking rho: 0.66, p<0.001; GOAL parent and FAQ walking rho: 0.58, p<0.001).

Significance

The results demonstrate that the child and parent versions of the GOAL 5.0 are valid and reliable for the comprehensive assessment of Turkish children with CP.

背景：大多数问卷很少提供有关儿童或家长对功能的看法的信息，也不试图了解他们的优先事项或期望。步态结果评估清单（GOAL）问卷旨在通过确定患者和家属对步态干预的最重要目标来填补这一空白：研究问题：调查 GOAL 问卷在土耳其脑瘫（CP）儿童中的重复测试可靠性、并发有效性和判别有效性：在这项研究中，我们纳入了 81 名 5-18 岁的 CP 儿童及其家庭。使用的是 5.0 版 GOAL 家长和儿童问卷。为每位参与者计算标准化的项目、领域和总分（所有领域）。通过类内相关系数（ICC）对测试-再测可靠性进行评估。吉列功能评估问卷（FAQ）用于验证：儿童的平均年龄为 10.4 ± 3.3 岁（5-18 岁不等），64.2% 为男孩。GOAL-儿童总分和GOAL-家长总分的重测可靠性极佳（儿童ICC：0.97，家长ICC：0.96）。所有领域得分和总分的测量标准误差（SEM）均小于 20 分。儿童在 GOAL 问卷中的总分在 GMFCS 水平之间存在显著差异（p 显著性）：结果表明，GOAL 5.0 的儿童版和家长版在对土耳其脊髓灰质炎儿童进行综合评估时是有效和可靠的。

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引用次数: 0

Within-session variability of different gait quality indices in neurological disorders 神经系统疾病中不同步态质量指标的会内变异性

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.08.054

A.S. Orejel Bustos , M. Tramontano , P. Brasiliano , V. Belluscio , S. Vasta , G. Marangon , E. Bergamini , G. Vannozzi

引用次数: 0

Mechanisms of gait speed changes in middle-aged adults: Simultaneous analysis of magnitude and temporal effects 中年人步速变化的机制：同时分析幅度和时间效应。

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.09.017

Vinayak Vijayan , Shanpu Fang , Timothy Reissman , Allison L. Kinney , Megan E. Reissman

Background

Middle-aged adults represent the transition between younger and older adults, where some of the characteristic gait differences due to aging begins to surface. However, the gait characteristics of middle-aged adults across the whole gait cycle remains an understudied topic. As speed is a sensitive indicator of health, characterizing the effects of speed on the gait of middle-aged adults and differentiating it from the response of young adults will provide insights into the effects of aging on gait speed modulation mechanisms.

Research question

What are the mechanisms of gait speed changes that are employed by middle-aged adults, and how are they different from younger adults?

Methods

A cohort of healthy young and middle-aged adults completed 60 second trials at three different speeds. Joint kinematics, kinetics, and surface electromyography data were analyzed and compared between the speed levels and age groups. Statistical Parametric Mapping along with a nonlinear curve registration algorithm was used to simultaneously assess the changes in both magnitude and timing of different metrics.

Results

When compared to the younger cohort, the middle-aged cohort had significantly lower ankle range of motion, dorsiflexion moment during loading response and plantarflexion moment during push-off. At the knee joint, the middle-aged adults had significantly lower knee flexion moment during stance. At the hip joint, the middle-aged adults had lower extension moment during terminal stance.

Significance

Time-continuous analysis showed that primary differences due to age were related to decreased joint range of motion and joint moment production capability in the middle-aged adults. Faster walking appears a safe method for middle-aged adults to increase joint range of motion and joint moment expression. However, targeted interventions that focus on improving capability are likely also needed. Suggested targets being improving ankle and knee joint moment capability, and increased range of motion at all joints.

背景：中年人是年轻人和老年人之间的过渡阶段，在这一阶段，一些因衰老而产生的步态差异特征开始显现。然而，中年人在整个步态周期中的步态特征仍然是一个研究不足的课题。由于速度是衡量健康状况的一个敏感指标，研究速度对中年人步态的影响并将其与年轻人的反应区分开来，将有助于深入了解衰老对步态速度调节机制的影响：研究问题：中年人步速变化的机制是什么，与年轻人有何不同？一组健康的年轻人和中年人以三种不同的速度完成了 60 秒钟的试验。对关节运动学、运动学和表面肌电图数据进行分析，并在速度水平和年龄组之间进行比较。统计参数映射法和非线性曲线注册算法被用于同时评估不同指标的幅度和时间变化：结果：与年轻组相比，中年组的踝关节活动范围、加载反应时的背屈力矩和推起时的跖屈力矩明显较小。在膝关节，中年人在站立时的膝关节屈曲力矩明显较低。在髋关节，中年人在终站时的伸展力矩较低：时间连续分析表明，年龄造成的主要差异与中年人关节活动范围和关节力矩产生能力的下降有关。对于中年人来说，快走似乎是增加关节活动范围和关节力矩表达的一种安全方法。不过，可能还需要采取有针对性的干预措施，重点提高能力。建议的目标是提高踝关节和膝关节的力矩能力，并增加所有关节的活动范围。

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引用次数: 0

Influence of medial longitudinal arch flexibility on lower limb joint coupling coordination and gait impulse 内侧纵弓灵活性对下肢关节耦合协调和步态冲力的影响。

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.10.002

Xuanzhen Cen , Peimin Yu , Yang Song , Dong Sun , Minjun Liang , István Bíró , Yaodong Gu

Background

A causal link exists between structural differences in the foot and alterations in the lower limb biomechanics, which might predispose an individual to develop characteristic musculoskeletal disorders.

Research question

This study aimed to determine how the foot structural characteristics, as represented by the medial longitudinal arch flexibility, affect lower limb joint coupling coordination and anterior-posterior ground reaction impulses (GRIs) during walking and running.

Methods

Following the calculation of arch height flexibility, a total of fifty-four physically active males were grouped and completed gait experiments to collect kinematic and kinetic data synchronously. Inter-joint coordination and variability were calculated from the angle-angle plots of knee-hip, ankle-knee, and metatarsophalangeal (MTP)-ankle couplings based on an optimized vector coding technique.

Results

Our results indicate that coupling coordination of interest and its variability, as well as anterior-posterior GRIs, could potentially be influenced due to differences in arch height flexibility. Notably, the individuals with stiff arches exhibited significantly greater coordination variabilities during the early stance for both ankle-knee and MTP-ankle coordination yet significantly smaller for MTP-ankle coordination variabilities during the mid-stance phase. Furthermore, combining the statistical parametric mapping analysis results, the flexible arches experienced a greater proportion of GRIs in the anterior-posterior direction.

Significance

In conclusion, these observations demonstrated that variations in arch flexibility led to differences in lower limb joint coordination variabilities and GRIs during gait. This fresh insight into inter-joint coordinative function may be useful for enhancing foot motion strategies based on arch structural characteristics.

背景：足部结构差异与下肢生物力学改变之间存在因果关系，这可能会导致个体患上特征性肌肉骨骼疾病：本研究旨在确定以足弓内侧纵向灵活性为代表的足部结构特征如何影响步行和跑步过程中的下肢关节耦合协调和前后地面反应脉冲（GRIs）：在计算足弓高度灵活性后，将 54 名身体活跃的男性分组并完成步态实验，同步收集运动学和动力学数据。根据优化的矢量编码技术，从膝-髋、踝-膝和跖趾关节（MTP）-踝关节耦合的角度-角度图中计算关节间的协调性和变异性：结果：我们的研究结果表明，足弓高度灵活性的差异可能会影响相关耦合协调性及其可变性，以及前后GRIs。值得注意的是，足弓僵硬的个体在早期站立时，踝关节-膝关节和 MTP-踝关节的协调变异性明显更大，但在中期站立阶段，MTP-踝关节的协调变异性明显更小。此外，结合统计参数映射分析结果，灵活的足弓在前后方向上出现 GRI 的比例更大：总之，这些观察结果表明，足弓灵活性的变化导致了步态过程中下肢关节协调变异性和GRI的差异。这种对关节间协调功能的新认识可能有助于根据足弓结构特征改进足部运动策略。

{"title":"Influence of medial longitudinal arch flexibility on lower limb joint coupling coordination and gait impulse","authors":"Xuanzhen Cen , Peimin Yu , Yang Song , Dong Sun , Minjun Liang , István Bíró , Yaodong Gu","doi":"10.1016/j.gaitpost.2024.10.002","DOIUrl":"10.1016/j.gaitpost.2024.10.002","url":null,"abstract":"<div><h3>Background</h3><div>A causal link exists between structural differences in the foot and alterations in the lower limb biomechanics, which might predispose an individual to develop characteristic musculoskeletal disorders.</div></div><div><h3>Research question</h3><div>This study aimed to determine how the foot structural characteristics, as represented by the medial longitudinal arch flexibility, affect lower limb joint coupling coordination and anterior-posterior ground reaction impulses (GRIs) during walking and running.</div></div><div><h3>Methods</h3><div>Following the calculation of arch height flexibility, a total of fifty-four physically active males were grouped and completed gait experiments to collect kinematic and kinetic data synchronously. Inter-joint coordination and variability were calculated from the angle-angle plots of knee-hip, ankle-knee, and metatarsophalangeal (MTP)-ankle couplings based on an optimized vector coding technique.</div></div><div><h3>Results</h3><div>Our results indicate that coupling coordination of interest and its variability, as well as anterior-posterior GRIs, could potentially be influenced due to differences in arch height flexibility. Notably, the individuals with stiff arches exhibited significantly greater coordination variabilities during the early stance for both ankle-knee and MTP-ankle coordination yet significantly smaller for MTP-ankle coordination variabilities during the mid-stance phase. Furthermore, combining the statistical parametric mapping analysis results, the flexible arches experienced a greater proportion of GRIs in the anterior-posterior direction.</div></div><div><h3>Significance</h3><div>In conclusion, these observations demonstrated that variations in arch flexibility led to differences in lower limb joint coordination variabilities and GRIs during gait. This fresh insight into inter-joint coordinative function may be useful for enhancing foot motion strategies based on arch structural characteristics.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"114 ","pages":"Pages 208-214"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142383060","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}

引用次数: 0

Post-mechanotherapy differences in postural control in patients with Achilles tendinopathy - A randomized controlled trial 跟腱病患者接受机械疗法后姿势控制能力的差异--随机对照试验

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.09.009

Piotr Król, Kajetan Jacek Słomka, Grzegorz Juras, Wojciech Marszałek, Magdalena Stania

Background

Neuromuscular deficits affecting functional ability can occur in patients with Achilles tendinopathy during difficult balance activities. This study aimed to assess postural control in patients with Achilles tendinopathy after shockwave and sonotherapy, using advanced analytical methods, including rambling-trembling signal decomposition and sample entropy.

Research question

What are the differences in postural control between patients with Achilles tendinopathy after shockwave therapy, ultrasound therapy, and placebo ultrasound?

Methods

Thirty-nine patients were included in the study, and randomly assigned to 3 groups, i.e., shockwave therapy, ultrasound therapy and placebo ultrasound. Postural sway was assessed during quiet standing with eyes open and closed, with two force platforms, one for the affected and the other for the non-affected limb, at baseline and at weeks 1 and 6 after treatment. Rambling-trembling trajectories and sample entropy were calculated for the antero-posterior and medio-lateral directions.

Results

The parameters of trembling trajectory in both directions were significantly smaller for the affected compared to non-affected limb. The ultrasound group had significantly larger rambling-trembling trajectories in the antero-posterior and medio-lateral sway directions than the shockwave therapy group. Also, all patients had more difficulty controlling their postural sway while standing with eyes closed compared to eyes open. Sample entropy was not significantly affected by the therapy type, timepoint and limb condition.

Significance

As opposed to sample entropy, rambling-trembling decomposition can complement or replace traditional linear measures of COP time series in functional assessment of the Achilles tendon.

研究背景跟腱病患者在进行高难度平衡活动时会出现影响功能的肌肉障碍。研究问题跟腱病患者在接受冲击波治疗、超声波治疗和安慰剂超声波治疗后，其姿势控制能力有何差异？方法39名患者被纳入研究，并随机分配到3组，即冲击波治疗组、超声波治疗组和安慰剂超声波治疗组。在基线期、治疗后第 1 周和第 6 周，在睁眼和闭眼安静站立时，使用两个力平台（一个用于患肢，另一个用于非患肢）对姿势摇摆进行评估。结果患肢在两个方向上的颤抖轨迹参数都明显小于非患肢。与冲击波治疗组相比，超声波治疗组在前后侧和内外侧摇摆方向上的震颤轨迹明显更大。此外，与睁眼相比，所有患者在闭眼站立时更难控制其姿势摇摆。样本熵受治疗类型、时间点和肢体条件的影响不大。意义与样本熵不同，在跟腱功能评估中，漫步-颤动分解可以补充或取代传统的 COP 时间序列线性测量。

{"title":"Post-mechanotherapy differences in postural control in patients with Achilles tendinopathy - A randomized controlled trial","authors":"Piotr Król, Kajetan Jacek Słomka, Grzegorz Juras, Wojciech Marszałek, Magdalena Stania","doi":"10.1016/j.gaitpost.2024.09.009","DOIUrl":"10.1016/j.gaitpost.2024.09.009","url":null,"abstract":"<div><h3>Background</h3><div>Neuromuscular deficits affecting functional ability can occur in patients with Achilles tendinopathy during difficult balance activities. This study aimed to assess postural control in patients with Achilles tendinopathy after shockwave and sonotherapy, using advanced analytical methods, including rambling-trembling signal decomposition and sample entropy.</div></div><div><h3>Research question</h3><div>What are the differences in postural control between patients with Achilles tendinopathy after shockwave therapy, ultrasound therapy, and placebo ultrasound?</div></div><div><h3>Methods</h3><div>Thirty-nine patients were included in the study, and randomly assigned to 3 groups, i.e., shockwave therapy, ultrasound therapy and placebo ultrasound. Postural sway was assessed during quiet standing with eyes open and closed, with two force platforms, one for the affected and the other for the non-affected limb, at baseline and at weeks 1 and 6 after treatment. Rambling-trembling trajectories and sample entropy were calculated for the antero-posterior and medio-lateral directions.</div></div><div><h3>Results</h3><div>The parameters of trembling trajectory in both directions were significantly smaller for the affected compared to non-affected limb. The ultrasound group had significantly larger rambling-trembling trajectories in the antero-posterior and medio-lateral sway directions than the shockwave therapy group. Also, all patients had more difficulty controlling their postural sway while standing with eyes closed compared to eyes open. Sample entropy was not significantly affected by the therapy type, timepoint and limb condition.</div></div><div><h3>Significance</h3><div>As opposed to sample entropy, rambling-trembling decomposition can complement or replace traditional linear measures of COP time series in functional assessment of the Achilles tendon.</div></div>","PeriodicalId":12496,"journal":{"name":"Gait & posture","volume":"114 ","pages":"Pages 180-192"},"PeriodicalIF":2.2,"publicationDate":"2024-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142357877","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}

引用次数: 0

Comparison of inertial-based filters for orientation estimation in indoor and outdoor running 基于惯性滤波器的室内外跑步方向估计比较

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.08.051

A. Machetti , R. Rossanigo , M. Caruso , G. Martinez , L. Ventura , A. Manca , F. Deriu , A. Cereatti

引用次数: 0

Using textile sensors to assess electromyographic activation patterns during gait 使用织物传感器评估步态过程中的肌电激活模式

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.08.037

F. Colelli Riano , F. Amitrano , A. De Rosa , G. Iaselli , A. Biancardi , A. Coccia , G. D’Addio

引用次数: 0

The effects of subsensory electrical noise stimulation on the reactive control of balance during support surface perturbations 亚感觉电噪声刺激对支撑面扰动时平衡反应控制的影响

IF 2.2 3区医学 Q3 NEUROSCIENCES

Gait & posture

Pub Date : 2024-10-01 DOI: 10.1016/j.gaitpost.2024.10.006

Zahra Bassiri , Oluwasegun Akinniyi , Nathan Humphrey , Dario Martelli

Background

The ability to respond effectively to balance perturbations is crucial for fall prevention. Subsensory electrical stimulation (SES) applied to the skin leads to improved proactive balance control but there is limited evidence on the SES effect on reactive balance control.

Research Questions

To test the efficiency of SES in improving reactive balance control against unpredictable support surface perturbations and to compare the effects of SES applied to the trunk and the lower legs.

Methods

Twenty-three young adults stood on a treadmill while recovering from 15 forward and 15 backward surface translations of increasing magnitude to determine the backward and forward stepping thresholds (BSTh and FSTh). Then, they recovered from three repetitions of forward and backward perturbations of fixed magnitude to determine the characteristic of the compensatory step (i.e., step time, step length, step delay and Margin of Stability - MOS). Each test was conducted with no stimulation (NS), leg stimulation (LS), or trunk stimulation (TS) equal to 90 % of the sensory threshold. Repeated-measures ANOVA and Tukey post-hoc tests were used to analyze the main and interaction effects of stimulation and repetition.

Results

TS and LS increased the BSTh by 31.5 % (p=0.002) and 16.4 % (p=0.028), respectively, with greater effects of TS; (ii) during backward perturbations, TS reduced compensatory step time by 9.0 %, step length by 17.1 %, and MOS at compensatory heel strike by 17.7 % (p<0.016); and (iii) during forward perturbations, LS and TS reduced the step time by 4.5 % and 3.5 % (p<0.017), and increased the minimum MOS by 7.8 % and 4.5 %, respectively (p<0.048).

Significance

This is the first study that showed how the application of SES affects reactive balance control during support surface perturbations. TS was more effective than LS during backward perturbations. TS may be an effective strategy to enhance balance control during reactive postural tasks, thus potentially reducing fall risk.

背景：有效应对平衡干扰的能力对于预防跌倒至关重要。施加在皮肤上的亚感觉电刺激（SES）可提高主动平衡控制能力，但有关 SES 对被动平衡控制能力影响的证据却很有限：研究问题：测试 SES 对不可预测的支撑面扰动改善反应平衡控制的效率，并比较施加在躯干和小腿上的 SES 的效果：方法：23 名年轻成年人站在跑步机上，同时从 15 次向前和 15 次向后的表面平移中恢复，平移幅度依次增大，以确定前后跨步阈值（BSTh 和 FSTh）。然后，他们从三次重复的固定幅度的向前和向后扰动中恢复，以确定补偿步的特征（即步长、步长、步长延迟和稳定幅度 - MOS）。每次测试都在无刺激（NS）、腿部刺激（LS）或躯干刺激（TS）相当于感觉阈值 90% 的情况下进行。采用重复测量方差分析和 Tukey 事后检验分析刺激和重复的主效应和交互效应：结果：TS和LS分别增加了31.5%（p=0.002）和16.4%（p=0.028）的BSTh，其中TS的影响更大；(ii) 在向后扰动时，TS减少了9.0%的代偿步时间、17.1%的步长和17.7%的代偿击踵时的MOS（p显著性：这是第一项显示在支撑面扰动时应用 SES 如何影响反应平衡控制的研究。在后向扰动过程中，TS 比 LS 更有效。在执行反应性姿势任务时，TS 可能是一种增强平衡控制的有效策略，从而有可能降低跌倒风险。

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引用次数: 0