Clinical Biomechanics最新文献_第9页

Upper limb motor dysfunction is associated with fragmented kinetics after brain injury 上肢运动功能障碍与脑损伤后的运动学分裂有关

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-07 DOI: 10.1016/j.clinbiomech.2024.106221

Emilie Mathieu , David Gasq , Sylvain Crémoux , Célia Delcamp , Camille Cormier , Philippe Pudlo , David Amarantini

Background

Characterization of motor deficits after brain injury is important for rehabilitation personalization. While studies reported abnormalities in the kinematics of paretic and non-paretic elbow extension for patients with brain injuries, kinematic analysis is not sufficient to explore how patients deal with musculoskeletal redundancy and the energetic aspect of movement execution. Conversely, interarticular coordination and movement kinetics can reflect patients' motor strategies. This study investigates motor strategies of paretic and non-paretic upper limb after brain injury to highlight motor deficits or compensation strategies.

Methods

26 brain-injured hemiplegic patients and 24 healthy controls performed active elbow extensions in the horizontal plane, with both upper limbs for patients and, with the dominant upper limb for controls. Elbow and shoulder kinematics, interarticular coordination, net joint kinetics were quantified.

Findings

Results show alterations in kinematics, and a strong correlation between elbow and shoulder angles, as well as time to reach elbow and shoulder peak angular velocity in both upper limbs of patients. Net joint kinetics were lower for paretic limb and highlighted a fragmented motor strategy with increased number of transitions between concentric and eccentric phases.

Interpretation

In complement to kinematic results, our kinetic results confirmed patients' difficulties to manage both spatially and temporally the joint degrees of freedom redundancy but revealed a fragmented compensatory motor strategy allowing patients upper limb extension despite quality alteration and decrease in energy efficiency. Motor rehabilitation should improve the management of this fragmentation strategy to improve the performance and the efficiency of active movement after brain injury.

背景脑损伤后运动障碍的特征对于个性化康复非常重要。虽然有研究报告称脑损伤患者在瘫痪和非瘫痪肘关节伸展运动学方面存在异常，但运动学分析并不足以探究患者如何处理肌肉骨骼冗余和运动执行的能量方面。相反，关节间协调和运动动力学可以反映患者的运动策略。本研究调查了脑损伤后上肢瘫痪和非瘫痪患者的运动策略，以突出运动缺陷或补偿策略。方法26名脑损伤偏瘫患者和24名健康对照者在水平面上进行主动伸肘运动，患者使用双上肢，对照者使用优势上肢。结果表明，患者双上肢的运动学发生了改变，肘部和肩部的角度以及达到肘部和肩部角速度峰值的时间之间存在很强的相关性。作为对运动学结果的补充，我们的运动学结果证实了患者难以在空间和时间上管理关节自由度的冗余，但也揭示了一种零散的代偿运动策略，使患者能够在质量改变和能效降低的情况下伸展上肢。运动康复应改善对这种片段策略的管理，以提高脑损伤后主动运动的表现和效率。

{"title":"Upper limb motor dysfunction is associated with fragmented kinetics after brain injury","authors":"Emilie Mathieu , David Gasq , Sylvain Crémoux , Célia Delcamp , Camille Cormier , Philippe Pudlo , David Amarantini","doi":"10.1016/j.clinbiomech.2024.106221","DOIUrl":"https://doi.org/10.1016/j.clinbiomech.2024.106221","url":null,"abstract":"<div><h3>Background</h3><p>Characterization of motor deficits after brain injury is important for rehabilitation personalization. While studies reported abnormalities in the kinematics of paretic and non-paretic elbow extension for patients with brain injuries, kinematic analysis is not sufficient to explore how patients deal with musculoskeletal redundancy and the energetic aspect of movement execution. Conversely, interarticular coordination and movement kinetics can reflect patients' motor strategies. This study investigates motor strategies of paretic and non-paretic upper limb after brain injury to highlight motor deficits or compensation strategies.</p></div><div><h3>Methods</h3><p>26 brain-injured hemiplegic patients and 24 healthy controls performed active elbow extensions in the horizontal plane, with both upper limbs for patients and, with the dominant upper limb for controls. Elbow and shoulder kinematics, interarticular coordination, net joint kinetics were quantified.</p></div><div><h3>Findings</h3><p>Results show alterations in kinematics, and a strong correlation between elbow and shoulder angles, as well as time to reach elbow and shoulder peak angular velocity in both upper limbs of patients. Net joint kinetics were lower for paretic limb and highlighted a fragmented motor strategy with increased number of transitions between concentric and eccentric phases.</p></div><div><h3>Interpretation</h3><p>In complement to kinematic results, our kinetic results confirmed patients' difficulties to manage both spatially and temporally the joint degrees of freedom redundancy but revealed a fragmented compensatory motor strategy allowing patients upper limb extension despite quality alteration and decrease in energy efficiency. Motor rehabilitation should improve the management of this fragmentation strategy to improve the performance and the efficiency of active movement after brain injury.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0268003324000536/pdfft?md5=4856b0c11d30b39264833d544d1b5801&pid=1-s2.0-S0268003324000536-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140104127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Individuals with knee osteoarthritis show few limitations in balance recovery responses after moderate gait perturbations 膝关节骨性关节炎患者在中度步态扰动后的平衡恢复反应很少受到限制

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-05 DOI: 10.1016/j.clinbiomech.2024.106218

R.J. Boekesteijn , N.L.W. Keijsers , K. Defoort , A.C.H. Geurts , K. Smulders

Background

Knee osteoarthritis causes structural joint damage. The resultant symptoms can impair the ability to recover from unexpected gait perturbations. This study compared balance recovery responses to moderate gait perturbations between individuals with knee osteoarthritis and healthy individuals.

Methods

Kinematic data of 35 individuals with end-stage knee osteoarthritis, and 32 healthy individuals in the same age range were obtained during perturbed walking on a treadmill at 1.0 m/s. Participants received anteroposterior (acceleration or deceleration) or mediolateral perturbations during the stance phase. Changes from baseline in margin of stability, step length, step time, and step width during the first two steps after perturbation were compared between groups using a linear regression model. Extrapolated center of mass excursion was descriptively analyzed.

Findings

After all perturbation modes, extrapolated center of mass trajectories overlapped between individuals with knee osteoarthritis and healthy individuals. Participants predominantly responded to mediolateral perturbations by adjusting their step width, and to anteroposterior perturbations by adjusting step length and step time. None of the perturbation modes yielded between-group differences in changes in margin of stability and step width during the first two steps after perturbation. Small between-group differences were observed for step length (i.e. 2 cm) of the second step after mediolateral and anteroposterior perturbations, and for step time (i.e. 0.01–0.02 s) of first step after mediolateral perturbations and the second step after outward and belt acceleration perturbations.

Interpretation

Despite considerable pain and damage to the knee joint, individuals with knee osteoarthritis showed comparable balance recovery responses after moderate gait perturbations to healthy participants.

膝关节骨关节炎会造成关节结构性损伤。由此产生的症状会损害从意外步态扰动中恢复的能力。本研究比较了膝关节骨性关节炎患者和健康人对中度步态扰动的平衡恢复反应。研究人员在跑步机上以 1.0 米/秒的速度进行扰动行走时，获取了 35 名膝关节骨性关节炎晚期患者和 32 名同年龄健康人的运动学数据。参与者在站立阶段接受了前胸（加速或减速）或内侧扰动。使用线性回归模型比较了不同组别在扰动后前两步的稳定幅度、步长、步幅和步时与基线相比的变化。对推断的质心偏移进行了描述性分析。在所有扰动模式下，膝关节骨性关节炎患者和健康人的推断质心轨迹都有重叠。参与者主要通过调整步幅对内侧扰动做出反应，通过调整步长和步长时间对前后扰动做出反应。在扰动后的前两步中，没有任何一种扰动模式在稳定性边缘和步幅的变化上产生组间差异。在内侧和前胸扰动后第二步的步长（即 2 厘米），以及在内侧扰动后第一步的步长（即 0.01-0.02 秒）和向外和带加速度扰动后第二步的步长（即 0.01-0.02 秒）方面，观察到了较小的组间差异。尽管膝关节有相当程度的疼痛和损伤，但膝关节骨性关节炎患者在中度步态扰动后表现出的平衡恢复反应与健康参与者相当。

{"title":"Individuals with knee osteoarthritis show few limitations in balance recovery responses after moderate gait perturbations","authors":"R.J. Boekesteijn , N.L.W. Keijsers , K. Defoort , A.C.H. Geurts , K. Smulders","doi":"10.1016/j.clinbiomech.2024.106218","DOIUrl":"10.1016/j.clinbiomech.2024.106218","url":null,"abstract":"<div><h3>Background</h3><p>Knee osteoarthritis causes structural joint damage. The resultant symptoms can impair the ability to recover from unexpected gait perturbations. This study compared balance recovery responses to moderate gait perturbations between individuals with knee osteoarthritis and healthy individuals.</p></div><div><h3>Methods</h3><p>Kinematic data of 35 individuals with end-stage knee osteoarthritis, and 32 healthy individuals in the same age range were obtained during perturbed walking on a treadmill at 1.0 m/s. Participants received anteroposterior (acceleration or deceleration) or mediolateral perturbations during the stance phase. Changes from baseline in margin of stability, step length, step time, and step width during the first two steps after perturbation were compared between groups using a linear regression model. Extrapolated center of mass excursion was descriptively analyzed.</p></div><div><h3>Findings</h3><p>After all perturbation modes, extrapolated center of mass trajectories overlapped between individuals with knee osteoarthritis and healthy individuals. Participants predominantly responded to mediolateral perturbations by adjusting their step width, and to anteroposterior perturbations by adjusting step length and step time. None of the perturbation modes yielded between-group differences in changes in margin of stability and step width during the first two steps after perturbation. Small between-group differences were observed for step length (i.e. 2 cm) of the second step after mediolateral and anteroposterior perturbations, and for step time (i.e. 0.01–0.02 s) of first step after mediolateral perturbations and the second step after outward and belt acceleration perturbations.</p></div><div><h3>Interpretation</h3><p>Despite considerable pain and damage to the knee joint, individuals with knee osteoarthritis showed comparable balance recovery responses after moderate gait perturbations to healthy participants.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0268003324000500/pdfft?md5=d6be147ae410c17a55d2661874e9ed69&pid=1-s2.0-S0268003324000500-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Influence of musculoskeletal pain during gait on kinematics and selective motor control in individuals with spastic cerebral palsy: A pilot study 步态过程中的肌肉骨骼疼痛对痉挛性脑瘫患者运动学和选择性运动控制的影响：试点研究

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106219

Gilad Sorek , Marije Goudriaan , Itai Schurr , Simon-Henri Schless

Background

Individuals with cerebral-palsy commonly present with altered kinematics and selective-motor-control during gait, and may also experience musculoskeletal pain. This pilot study aims to investigate if the immediate experience of musculoskeletal pain during gait influences kinematics and selective-motor-control in individuals with spastic cerebral-palsy.

Methods

Retrospective treadmill-based gait-analysis data for 145 individuals with spastic cerebral-palsy were screened. Participants were asked about experiencing lower-extremity musculoskeletal pain immediately during gait, with 26 individuals (18%) reporting this was the case (pain-group; mean 11.55 ± 3.15 years, Gross-Motor-Function-Classification-System levels I/II/III n = 5/13/8, Uni/bilateral involvement n = 11/15). Of the 77 individuals who did not report any pain, a no-pain group (n = 26) was individually matched. Kinematics were evaluated using the Gait-Profile-Score and spatiotemporal parameters (dimensionless-walking-speed, single-leg-support percentage and step-time). Selective-motor-control was assessed using the Walking-Dynamic-Motor-Control index.

Findings

In the pain-group, 58% reported experiencing pain in their more-involved leg, 8% in the less-involved leg and 34% in both legs. Regarding the pain location, 38% of the pain-group reported experiencing pain in multiple locations. On a more specific level, 35%, 46% and 54% reported pain around the hip/thigh, knee/calf and ankle/ft, respectively. No significant differences were observed between the pain and no-pain groups for any of the outcome measures, in each leg or bilaterally.

Interpretation

No significant differences in kinematics and selective-motor-control during gait were found between individuals with spastic cerebral-palsy, with and without musculoskeletal pain. This suggests that the individuals in this study may not present with obvious antalgic gait patterns, which may relate to the pre-existing altered kinematics and selective-motor-control.

脑性瘫痪患者在步态过程中通常会出现运动学和选择性运动控制的改变，同时还可能出现肌肉骨骼疼痛。本试验性研究旨在探讨步态过程中肌肉骨骼疼痛的直接体验是否会影响痉挛性脑瘫患者的运动学和选择性运动控制。研究人员筛选了 145 名痉挛性脑瘫患者的基于跑步机的步态分析数据。参与者被问及在步态过程中是否会立即感到下肢肌肉骨骼疼痛，有 26 人（18%）报告了这种情况（疼痛组；平均 11.55 ± 3.15 岁，粗大运动功能分类系统 I/II/III 级 = 5/13/8，单侧/双侧受累 = 11/15）。在 77 名未报告任何疼痛的患者中，无疼痛组（= 26）进行了单独配对。运动学评估采用步态轮廓评分和时空参数（无量纲行走速度、单腿支撑百分比和步长）。选择性运动控制采用步行动态运动控制指数进行评估。在疼痛组中，有 58% 的人表示疼痛发生在受累较多的腿上，8% 的人表示疼痛发生在受累较少的腿上，34% 的人表示疼痛发生在两条腿上。在疼痛部位方面，38% 的疼痛组患者表示在多个部位感到疼痛。从更具体的角度看，分别有 35%、46% 和 54% 的人报告在臀部/大腿、膝盖/小腿和脚踝/脚掌周围感到疼痛。在每条腿或双侧的任何结果测量中，疼痛组和无疼痛组之间均未观察到明显差异。有和没有肌肉骨骼疼痛的痉挛性脑瘫患者在步态运动学和选择性运动控制方面没有发现明显差异。这表明，本研究中的患者可能并不表现出明显的反步态模式，这可能与之前存在的运动学和选择性运动控制的改变有关。

{"title":"Influence of musculoskeletal pain during gait on kinematics and selective motor control in individuals with spastic cerebral palsy: A pilot study","authors":"Gilad Sorek , Marije Goudriaan , Itai Schurr , Simon-Henri Schless","doi":"10.1016/j.clinbiomech.2024.106219","DOIUrl":"10.1016/j.clinbiomech.2024.106219","url":null,"abstract":"<div><h3>Background</h3><p>Individuals with cerebral-palsy commonly present with altered kinematics and selective-motor-control during gait, and may also experience musculoskeletal pain. This pilot study aims to investigate if the immediate experience of musculoskeletal pain during gait influences kinematics and selective-motor-control in individuals with spastic cerebral-palsy.</p></div><div><h3>Methods</h3><p>Retrospective treadmill-based gait-analysis data for 145 individuals with spastic cerebral-palsy were screened. Participants were asked about experiencing lower-extremity musculoskeletal pain immediately during gait, with 26 individuals (18%) reporting this was the case (pain-group; mean 11.55 ± 3.15 years, Gross-Motor-Function-Classification-System levels I/II/III <em>n</em> = 5/13/8, Uni/bilateral involvement <em>n</em> = 11/15). Of the 77 individuals who did not report any pain, a no-pain group (<em>n</em> = 26) was individually matched. Kinematics were evaluated using the Gait-Profile-Score and spatiotemporal parameters (dimensionless-walking-speed, single-leg-support percentage and step-time). Selective-motor-control was assessed using the Walking-Dynamic-Motor-Control index.</p></div><div><h3>Findings</h3><p>In the pain-group, 58% reported experiencing pain in their more-involved leg, 8% in the less-involved leg and 34% in both legs. Regarding the pain location, 38% of the pain-group reported experiencing pain in multiple locations. On a more specific level, 35%, 46% and 54% reported pain around the hip/thigh, knee/calf and ankle/ft, respectively. No significant differences were observed between the pain and no-pain groups for any of the outcome measures, in each leg or bilaterally.</p></div><div><h3>Interpretation</h3><p>No significant differences in kinematics and selective-motor-control during gait were found between individuals with spastic cerebral-palsy, with and without musculoskeletal pain. This suggests that the individuals in this study may not present with obvious antalgic gait patterns, which may relate to the pre-existing altered kinematics and selective-motor-control.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053693","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

Leaf spring exercise: A safe quadriceps strengthening exercise after anterior cruciate ligament reconstruction 片簧运动：前十字韧带重建后安全的股四头肌强化训练

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106213

Maki Koyanagi , Takayuki Matsuo , Naruhiko Nakae , Ryo Okimoto , Shota Nobekawa , Hideki Tsukuda , Issei Ogasawara , Konsei Shino

Background

Leg extensions should be avoided in the early stages after anterior cruciate ligament reconstruction because the force exerted by the quadriceps muscle leads to anterior tibial displacement. To allow for safe quadriceps training in the knee extension range during this period, we devised the leaf spring exercise, which involves placing subjects in the prone position with their knee slightly flexed and instructing them to perform maximum isometric quadriceps contractions while supporting the proximal region of the lower leg's anterior surface and immobilizing the femur's posterior surface to prevent lifting. The current study aimed to examine the safety of Leaf spring exercise by determining the femur–tibia relationship using ultrasound imaging.

Methods

This controlled laboratory study included patients with unilateral anterior cruciate ligament-deficient knees (8 men and 8 women; age, 24.2 ± 8.3 years) who were instructed to perform Leaf spring exercise of both lower limbs. We measured the femur–tibia-step-off, which indicates the distance between the last point of the medial and lateral condyles of the femur and posterior margin of the tibial plateau, as a parameter to evaluate anterior tibial displacement via ultrasound diagnostic device. Further, peak torque of the quadriceps muscle was calculated using force measurement device.

Findings

No difference in anterior tibial displacement and peak torque was observed between the uninjured and injured sides during Leaf spring exercise.

Interpretation

Leaf spring exercise may add some strain on the reconstructed anterior cruciate ligament; hence, it can be considered a safe quadriceps exercise in the knee extension range.

前交叉韧带重建后的早期阶段应避免伸腿，因为股四头肌施加的力量会导致胫骨前移位。为了在这一时期安全地进行膝关节伸展范围内的股四头肌训练，我们设计了叶片弹簧运动，即让受试者俯卧位，膝关节微屈，指导他们进行最大等长股四头肌收缩，同时支撑小腿前表面的近端区域，并固定股骨后表面以防止抬起。本研究旨在通过超声波成像确定股骨与胫骨的关系，从而检验叶片弹簧运动的安全性。这项实验室对照研究纳入了单侧前交叉韧带缺损膝关节患者（8 男 8 女；年龄 24.2 ± 8.3 岁），他们在指导下进行双下肢叶状弹簧运动。我们通过超声诊断仪测量了股骨-胫骨间距，即股骨内侧和外侧髁最后一点与胫骨平台后缘之间的距离，作为评估胫骨前移位的参数。此外，还使用测力装置计算了股四头肌的峰值扭矩。在叶片弹簧运动中，未受伤侧和受伤侧的胫骨前部位移和峰值扭矩均无差异。叶片弹簧运动可能会对重建的前十字韧带造成一定的压力；因此，在膝关节伸展范围内，叶片弹簧运动可被视为一种安全的股四头肌运动。

{"title":"Leaf spring exercise: A safe quadriceps strengthening exercise after anterior cruciate ligament reconstruction","authors":"Maki Koyanagi , Takayuki Matsuo , Naruhiko Nakae , Ryo Okimoto , Shota Nobekawa , Hideki Tsukuda , Issei Ogasawara , Konsei Shino","doi":"10.1016/j.clinbiomech.2024.106213","DOIUrl":"10.1016/j.clinbiomech.2024.106213","url":null,"abstract":"<div><h3>Background</h3><p>Leg extensions should be avoided in the early stages after anterior cruciate ligament reconstruction because the force exerted by the quadriceps muscle leads to anterior tibial displacement. To allow for safe quadriceps training in the knee extension range during this period, we devised the leaf spring exercise, which involves placing subjects in the prone position with their knee slightly flexed and instructing them to perform maximum isometric quadriceps contractions while supporting the proximal region of the lower leg's anterior surface and immobilizing the femur's posterior surface to prevent lifting. The current study aimed to examine the safety of Leaf spring exercise by determining the femur–tibia relationship using ultrasound imaging.</p></div><div><h3>Methods</h3><p>This controlled laboratory study included patients with unilateral anterior cruciate ligament-deficient knees (8 men and 8 women; age, 24.2 ± 8.3 years) who were instructed to perform Leaf spring exercise of both lower limbs. We measured the femur–tibia-step-off, which indicates the distance between the last point of the medial and lateral condyles of the femur and posterior margin of the tibial plateau, as a parameter to evaluate anterior tibial displacement via ultrasound diagnostic device. Further, peak torque of the quadriceps muscle was calculated using force measurement device.</p></div><div><h3>Findings</h3><p>No difference in anterior tibial displacement and peak torque was observed between the uninjured and injured sides during Leaf spring exercise.</p></div><div><h3>Interpretation</h3><p>Leaf spring exercise may add some strain on the reconstructed anterior cruciate ligament; hence, it can be considered a safe quadriceps exercise in the knee extension range.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139952905","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

A comparison between manual and automated event detection for a drop vertical jump task using motion capture 使用动作捕捉对垂直下落跳任务的手动和自动事件检测进行比较

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106220

Alex M. Loewen , Hannah L. Olander , Carlos Carlos Jr , Sophia Ulman

Background

The use of movement screens as a clinical tool for injury risk assessment requires variables to be extracted across specific phases of interest. While manually selecting task events is the traditional method, automated event detection is an effective technique that maintains consistency across a cohort. This study aimed to examine variations in event identification, comparing manual detection and the application of an automated algorithm, with a specific focus on a drop vertical jump task.

Methods

Thirty participants cleared to return-to-play after anterior cruciate ligament reconstruction and thirty controls were tested. For the automated event detection, normalized vertical ground reaction force and the velocity of the sacrum marker were used to identify five events during the drop vertical jump: initial contact, end of loading, end of propulsion, second contact, and end of second loading. Two raters manually selected events and were compared to the event times of the automated algorithm.

Findings

Manual event detection exhibited excellent reliability Significant differences between manual and automated detection were observed, particularly at events indicating the lowest squat position (Event2 and Event5). Participants who had undergone anterior cruciate ligament reconstruction demonstrated larger differences than controls at Event5, correlating with significant squat depth disparities.

Interpretation

While manual event detection demonstrated reliability, automated algorithms revealed differences, specifically in events of the drop vertical jump involving the lowest squat position. The automated algorithm presents potential benefits in reducing processing time and enhancing accuracy for event identification, offering valuable insights for motion capture applications in clinical settings.

使用运动筛查作为损伤风险评估的临床工具，需要在特定的关注阶段提取变量。手动选择任务事件是传统的方法，而自动事件检测则是一种有效的技术，可以保持整个队列的一致性。本研究旨在通过比较人工检测和自动算法的应用，对事件识别的变化进行研究，特别关注落体纵跳任务。对 30 名前交叉韧带重建后获准重返赛场的参赛者和 30 名对照组进行了测试。在自动事件检测中，使用归一化垂直地面反作用力和骶骨标记的速度来识别落体纵跳过程中的五个事件：初始接触、加载结束、推进结束、第二次接触和第二次加载结束。两名评分员手动选择事件，并与自动算法的事件时间进行比较。手动事件检测表现出极佳的可靠性手动检测和自动检测之间存在显著差异，尤其是在表示最低下蹲位置的事件（事件 2 和事件 5）上。接受过前十字韧带重建术的参与者在事件 5 处的差异比对照组更大，这与显著的下蹲深度差异有关。虽然手动事件检测显示出了可靠性，但自动算法显示出了差异，特别是在涉及最低下蹲位置的下蹲纵跳事件中。自动算法在减少处理时间和提高事件识别准确性方面具有潜在优势，为临床环境中的运动捕捉应用提供了宝贵的见解。

{"title":"A comparison between manual and automated event detection for a drop vertical jump task using motion capture","authors":"Alex M. Loewen , Hannah L. Olander , Carlos Carlos Jr , Sophia Ulman","doi":"10.1016/j.clinbiomech.2024.106220","DOIUrl":"10.1016/j.clinbiomech.2024.106220","url":null,"abstract":"<div><h3>Background</h3><p>The use of movement screens as a clinical tool for injury risk assessment requires variables to be extracted across specific phases of interest. While manually selecting task events is the traditional method, automated event detection is an effective technique that maintains consistency across a cohort. This study aimed to examine variations in event identification, comparing manual detection and the application of an automated algorithm, with a specific focus on a drop vertical jump task.</p></div><div><h3>Methods</h3><p>Thirty participants cleared to return-to-play after anterior cruciate ligament reconstruction and thirty controls were tested. For the automated event detection, normalized vertical ground reaction force and the velocity of the sacrum marker were used to identify five events during the drop vertical jump: initial contact, end of loading, end of propulsion, second contact, and end of second loading. Two raters manually selected events and were compared to the event times of the automated algorithm.</p></div><div><h3>Findings</h3><p>Manual event detection exhibited excellent reliability Significant differences between manual and automated detection were observed, particularly at events indicating the lowest squat position (Event2 and Event5). Participants who had undergone anterior cruciate ligament reconstruction demonstrated larger differences than controls at Event5, correlating with significant squat depth disparities.</p></div><div><h3>Interpretation</h3><p>While manual event detection demonstrated reliability, automated algorithms revealed differences, specifically in events of the drop vertical jump involving the lowest squat position. The automated algorithm presents potential benefits in reducing processing time and enhancing accuracy for event identification, offering valuable insights for motion capture applications in clinical settings.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053741","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

Lower limb squat biomechanics and select clinical measures in chronic ankle instability 慢性踝关节不稳的下肢深蹲生物力学和选定临床测量方法

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106211

David Werner , Lauren Casey , Ethan Myers , Joaquin A. Barrios

Background

Individuals with chronic ankle instability often present with clinical and biomechanical abnormalities, however squat biomechanics have not been investigated. The purpose of this study was to compare select clinical assessments and squat biomechanics between individuals with and without chronic ankle instability.

Methods

Fifteen individuals with chronic ankle instability and a matched control group were studied. A weight-bearing dorsiflexion lunge test, foot posture, and an in-line half-kneeling motor control test for core stability were assessed. Lower limb 3D bilateral and unilateral squat biomechanics were captured. Groups, limbs and squat tasks were compared using an alpha of 0.05.

Findings

Individuals with chronic ankle instability had less static weight-bearing dorsiflexion and failed the core stability test more frequently, but did not differ in foot morphology compared to the controls. When squatting, those with chronic ankle instability demonstrated reduced peak ankle dorsiflexion angles and moments in the involved limb (p < 0.04) during single limb squats and had interlimb differences in ankle dorsiflexion angle as well as hip and knee kinetics (p < 0.04) during double limb squats. In those with chronic ankle instability, there was less overall motion, but higher kinetic demands in single limb versus double leg squatting (p < 0.03).

Interpretation

Individuals with chronic ankle instability had impaired weight-bearing dorsiflexion and showed impaired core stability more often, which accompanied altered squatting mechanics in both variations. Within the limbs with chronic ankle instability, single limb squats showed lesser kinematic demands but higher kinetic demands than double limb squatting.

背景患有慢性踝关节不稳定的人通常会出现临床和生物力学异常，但尚未对深蹲生物力学进行研究。本研究的目的是比较患有和未患有慢性踝关节不稳定的患者的临床评估和深蹲生物力学。方法研究了 15 名患有慢性踝关节不稳定的患者和一个匹配的对照组。研究人员评估了负重背屈下蹲测试、足部姿势以及针对核心稳定性的直立半跪运动控制测试。还采集了下肢三维双侧和单侧深蹲生物力学数据。与对照组相比，慢性踝关节不稳定患者的静态负重背屈较小，核心稳定性测试失败的频率较高，但在足部形态上没有差异。下蹲时，患有慢性踝关节不稳定的人在单肢下蹲时，受累肢体的踝关节背屈角度和力矩峰值降低（p < 0.04），在双肢下蹲时，踝关节背屈角度以及髋关节和膝关节动力学存在肢体间差异（p < 0.04）。慢性踝关节不稳定患者的整体运动量较小，但单肢深蹲与双腿深蹲相比，动能要求更高（p < 0.03）。在患有慢性踝关节不稳定的肢体中，单肢深蹲的运动学要求低于双肢深蹲，但动力学要求高于双肢深蹲。

{"title":"Lower limb squat biomechanics and select clinical measures in chronic ankle instability","authors":"David Werner , Lauren Casey , Ethan Myers , Joaquin A. Barrios","doi":"10.1016/j.clinbiomech.2024.106211","DOIUrl":"https://doi.org/10.1016/j.clinbiomech.2024.106211","url":null,"abstract":"<div><h3>Background</h3><p>Individuals with chronic ankle instability often present with clinical and biomechanical abnormalities, however squat biomechanics have not been investigated. The purpose of this study was to compare select clinical assessments and squat biomechanics between individuals with and without chronic ankle instability.</p></div><div><h3>Methods</h3><p>Fifteen individuals with chronic ankle instability and a matched control group were studied. A weight-bearing dorsiflexion lunge test, foot posture, and an in-line half-kneeling motor control test for core stability were assessed. Lower limb 3D bilateral and unilateral squat biomechanics were captured. Groups, limbs and squat tasks were compared using an alpha of 0.05.</p></div><div><h3>Findings</h3><p>Individuals with chronic ankle instability had less static weight-bearing dorsiflexion and failed the core stability test more frequently, but did not differ in foot morphology compared to the controls. When squatting, those with chronic ankle instability demonstrated reduced peak ankle dorsiflexion angles and moments in the involved limb (<em>p</em> < 0.04) during single limb squats and had interlimb differences in ankle dorsiflexion angle as well as hip and knee kinetics (<em>p</em> < 0.04) during double limb squats. In those with chronic ankle instability, there was less overall motion, but higher kinetic demands in single limb versus double leg squatting (<em>p</em> < 0.03).</p></div><div><h3>Interpretation</h3><p>Individuals with chronic ankle instability had impaired weight-bearing dorsiflexion and showed impaired core stability more often, which accompanied altered squatting mechanics in both variations. Within the limbs with chronic ankle instability, single limb squats showed lesser kinematic demands but higher kinetic demands than double limb squatting.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S0268003324000433/pdfft?md5=e7dc3443d3daff98c4328501dfb2d477&pid=1-s2.0-S0268003324000433-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139999826","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Forward to the special issue on biomechanics of breast tissues and its clinical applications 乳腺组织生物力学及其临床应用特刊前言。

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106216

Pierre-Yves Rohan , Yohan Payan

引用次数: 0

Correcting for asymmetry of the proximal tibial epiphysis is warranted to determine postoperative alignment deviations in kinematic alignment from planned alignment of the tibial component on the native tibia 需要对胫骨近端骨骺的不对称进行校正，以确定术后胫骨组件在原生胫骨上的运动学排列与计划排列的偏差。

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106215

Alexander J. Nedopil , Ethan Rego , Andrew M. Hernandez , John M. Boone , Stephen M. Howell , Maury L. Hull

Background

In total knee arthroplasty, unrestricted kinematic alignment aims to restore pre-arthritic lower limb alignment and joint lines. Joint line orientations of the contralateral healthy proximal tibia might be used to evaluate accuracy of tibial component alignment post-operatively if asymmetry is minimal. Our objective was to evaluate left-to-right asymmetry of the proximal tibial epiphysis in posterior tibial slope and varus-valgus orientation as related to unrestricted kinematic alignment principles.

Methods

High resolution CT images (0.5 mm slice thickness) were acquired from bilateral lower limbs of 11 skeletally mature subjects with no skeletal abnormalities. Images were segmented to generate 3D tibia models. Asymmetry was quantified by differences in orientations required to shape-match the proximal epiphysis of the mirror 3D tibia model to the proximal epiphysis of the contralateral 3D tibia model.

Findings

Systematic and random differences (i.e. mean ± standard deviation) in tibial slope and varus-valgus orientation were − 0.8° ± 1.2° and − 0.2° ± 0.8°, respectively. Ninety five percent confidence intervals on the means included 0° indicating that systematic differences were minimal.

Interpretation

Since random differences due to asymmetry are substantial in relation to random surgical deviations from pre-arthritic joint lines previously reported, post-operative computer tomograms of the contralateral healthy tibia should not be used to directly assess accuracy of tibial component alignment on a group level without correcting for differences in tibial slope and varus-valgus orientation due to asymmetry.

背景在全膝关节置换术中，无限制的运动学对位旨在恢复关节炎前的下肢对位和关节线。如果不对称程度很小，对侧健康胫骨近端关节线方向可用于评估术后胫骨组件对位的准确性。我们的目的是评估胫骨近端骨骺在胫骨后斜度和变位-瓣膜方向上的左右不对称与无限制运动学对位原则的关系。对图像进行分割，生成三维胫骨模型。研究结果胫骨斜度和曲楔-瓣膜方向的系统和随机差异（即平均值±标准偏差）分别为- 0.8°±1.2°和- 0.2°±0.8°。由于不对称导致的随机差异与之前报道的关节炎前关节线的随机手术偏差相比非常大，因此在未校正不对称导致的胫骨斜度和屈曲-瓣膜方向差异的情况下，不应使用对侧健康胫骨的术后计算机断层图像直接评估胫骨组件对位的准确性。

{"title":"Correcting for asymmetry of the proximal tibial epiphysis is warranted to determine postoperative alignment deviations in kinematic alignment from planned alignment of the tibial component on the native tibia","authors":"Alexander J. Nedopil , Ethan Rego , Andrew M. Hernandez , John M. Boone , Stephen M. Howell , Maury L. Hull","doi":"10.1016/j.clinbiomech.2024.106215","DOIUrl":"10.1016/j.clinbiomech.2024.106215","url":null,"abstract":"<div><h3>Background</h3><p>In total knee arthroplasty, unrestricted kinematic alignment aims to restore pre-arthritic lower limb alignment and joint lines. Joint line orientations of the contralateral healthy proximal tibia might be used to evaluate accuracy of tibial component alignment post-operatively if asymmetry is minimal. Our objective was to evaluate left-to-right asymmetry of the proximal tibial epiphysis in posterior tibial slope and varus-valgus orientation as related to unrestricted kinematic alignment principles.</p></div><div><h3>Methods</h3><p>High resolution CT images (0.5 mm slice thickness) were acquired from bilateral lower limbs of 11 skeletally mature subjects with no skeletal abnormalities. Images were segmented to generate 3D tibia models. Asymmetry was quantified by differences in orientations required to shape-match the proximal epiphysis of the mirror 3D tibia model to the proximal epiphysis of the contralateral 3D tibia model.</p></div><div><h3>Findings</h3><p>Systematic and random differences (i.e. mean ± standard deviation) in tibial slope and varus-valgus orientation were − 0.8° ± 1.2° and − 0.2° ± 0.8°, respectively. Ninety five percent confidence intervals on the means included 0° indicating that systematic differences were minimal.</p></div><div><h3>Interpretation</h3><p>Since random differences due to asymmetry are substantial in relation to random surgical deviations from pre-arthritic joint lines previously reported, post-operative computer tomograms of the contralateral healthy tibia should not be used to directly assess accuracy of tibial component alignment on a group level without correcting for differences in tibial slope and varus-valgus orientation due to asymmetry.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139952908","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

Center of pressure palindromes reveals a wobbling standing balance in scoliotic girls 压力中心回文揭示了脊柱侧弯女孩摇摆不定的站立平衡能力

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-03-01 DOI: 10.1016/j.clinbiomech.2024.106217

Sébastien Leteneur , Mathias Blandeau , Franck Barbier , Nader Farahpour , Paul Allard

Background

This study characterized the center of pressure planar displacement by palindromic strings. The objective is to test if the center of pressure pathway of able-bodied girls and those with a moderate and severe scoliosis displayed similar palindromic tendencies.

Methods

The center of pressure excursions of 21 able-bodied girls were compared to 14 girls with a moderate scoliosis and 14 girls with severe one. Each girl was asked to stand upright on a force platform for 64 s. A crisscross grid of nine areas was centered around the mean center of pressure position (G) to define three other zones to use the MATLAB built-in nucleotide sequence analysis function. These were the antero-posterior extremities A, the coronal extremities C and the tilted or the four corners of the crisscross grid, T. The center of pressure positions were associated to any of the 4 zones using the GATC acronym.

Findings

For all groups center of pressure pattern in decreasing order was A, G, T and C. Able-bodied girls favored the A zones. Girls with moderate scoliosis displaced their center of pressure mostly in the A zones with shifts in the T sections (P ≤ 0.001). Girls with severe scoliosis, additionally displaced their center of pressure in the C zones (P ≤ 0.001).

Interpretation

An ankle modality characterized able-bodied girl's standing balance. Girls with a moderate scoliosis privilege the palindromic zones in the antero-posterior extremities with excursions in the corners of the base of support, girls with severe scoliosis further relied on the medio-lateral zones, suggesting a wobbling standing balance.

这项研究描述了压力中心平面位移的回旋弦特征。目的是测试健全女孩与中度和重度脊柱侧弯女孩的压力中心路径是否显示出相似的回旋趋势。21 名健全女孩与 14 名中度脊柱侧凸女孩和 14 名重度脊柱侧凸女孩的 CoP 偏移进行了比较。每个女孩都被要求在受力平台上直立站立 64 秒钟。以平均压力中心位置（G）为中心，由九个区域组成的纵横交错的网格定义了另外三个区域，以使用 MATLAB 内置的核苷酸序列分析功能。压力中心位置使用 GATC 首字母缩写词与 4 个区域中的任何一个相关联。所有组别的压力中心位置依次为 A、G、T 和 C。患有中度脊柱侧凸的女孩的压力中心主要偏移在 A 区，T 区也有偏移（≤ 0.001）。重度脊柱侧弯的女孩则会将压力中心转移到 C 区（P ≤ 0.001）。踝关节模式是健全女孩站立平衡的特征。中度脊柱侧凸的女孩在前后肢的垛状区享有特权，并在支撑基座的角落处有偏移，而重度脊柱侧凸的女孩则进一步依赖于内外侧区，这表明她们的站立平衡是摇摆不定的。

{"title":"Center of pressure palindromes reveals a wobbling standing balance in scoliotic girls","authors":"Sébastien Leteneur , Mathias Blandeau , Franck Barbier , Nader Farahpour , Paul Allard","doi":"10.1016/j.clinbiomech.2024.106217","DOIUrl":"10.1016/j.clinbiomech.2024.106217","url":null,"abstract":"<div><h3>Background</h3><p>This study characterized the center of pressure planar displacement by palindromic strings. The objective is to test if the center of pressure pathway of able-bodied girls and those with a moderate and severe scoliosis displayed similar palindromic tendencies.</p></div><div><h3>Methods</h3><p>The center of pressure excursions of 21 able-bodied girls were compared to 14 girls with a moderate scoliosis and 14 girls with severe one. Each girl was asked to stand upright on a force platform for 64 s. A crisscross grid of nine areas was centered around the mean center of pressure position (G) to define three other zones to use the MATLAB built-in nucleotide sequence analysis function. These were the antero-posterior extremities A, the coronal extremities C and the tilted or the four corners of the crisscross grid, T. The center of pressure positions were associated to any of the 4 zones using the GATC acronym.</p></div><div><h3>Findings</h3><p>For all groups center of pressure pattern in decreasing order was A, G, T and C. Able-bodied girls favored the A zones. Girls with moderate scoliosis displaced their center of pressure mostly in the A zones with shifts in the T sections (<em>P</em> ≤ 0.001). Girls with severe scoliosis, additionally displaced their center of pressure in the C zones (P ≤ 0.001).</p></div><div><h3>Interpretation</h3><p>An ankle modality characterized able-bodied girl's standing balance. Girls with a moderate scoliosis privilege the palindromic zones in the antero-posterior extremities with excursions in the corners of the base of support, girls with severe scoliosis further relied on the medio-lateral zones, suggesting a wobbling standing balance.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140053744","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

Framework for early detection and classification of balance pathologies using posturography and anthropometric variables 利用体位测量法和人体测量变量对平衡病症进行早期检测和分类的框架

IF 1.8 3区医学 Q2 Medicine

Clinical Biomechanics

Pub Date : 2024-02-20 DOI: 10.1016/j.clinbiomech.2024.106214

Arnab Sarmah , Raghav Aggarwal , Sarth Sameer Vitekar , Shunsuke Katao , Lipika Boruah , Satoshi Ito , Subramani Kanagaraj

Background

Early detection of balance-related pathologies in adults using Posturography, anthropometric and personal data is limited. Our goal is to address this issue. It will enable us to identify adults in early stages of balance disorders using easily accessible and measurable data.

Methods

Open-source data of 163 subjects (47 males and 116 females) is used to train and test classification algorithms. Features include mean and standard deviation of the center of pressure displacement, obtained through posturography, the anthropometric and personal variables (age, sex, body mass index, foot length), and Trail Making Test scores. 75% of the data is employed for training and 25% of the data is used for testing. It is then validated using an indigenously collected dataset of healthy individuals.

Findings

Accuracy and Sensitivity, both, increases when anthropometric and personal variables are included alongside center of pressure features for classification. Specificity decreases slightly with the addition of anthropometric and personal variables with center of pressure displacement feature, which also affects the classification algorithms' performance. Standard deviation of the center of pressure displacement is found to be more effective than the mean value. A similar trend of the increased performance is observed during validation, except when neural networks were used for the classification.

Interpretation

Posturography data, Anthropometric measurements, personal data and self-assessment scales can identify balance issues in adults, making it suitable for community health centers with limited resources. Early detection prompts timely medical care, improving the management of disorders and thus enhancing the quality of life through rehabilitation.

背景使用体位测量学、人体测量学和个人数据对成人平衡相关病症的早期检测非常有限。我们的目标是解决这一问题。方法使用 163 名受试者（47 名男性和 116 名女性）的公开数据来训练和测试分类算法。其特征包括通过体位测量法获得的压力中心位移的平均值和标准偏差、人体测量和个人变量（年龄、性别、体重指数、脚长）以及路径创建测试得分。75% 的数据用于训练，25% 的数据用于测试。当人体测量和个人变量与压力中心特征一起用于分类时，准确度和灵敏度都会提高。随着人体测量和个人变量与压力中心位移特征的加入，特异性略有下降，这也影响了分类算法的性能。压力位移中心的标准偏差比平均值更有效。除了使用神经网络进行分类外，在验证过程中也观察到了类似的性能提高趋势。早期发现可促使及时就医，改善对失调的管理，从而通过康复提高生活质量。

{"title":"Framework for early detection and classification of balance pathologies using posturography and anthropometric variables","authors":"Arnab Sarmah , Raghav Aggarwal , Sarth Sameer Vitekar , Shunsuke Katao , Lipika Boruah , Satoshi Ito , Subramani Kanagaraj","doi":"10.1016/j.clinbiomech.2024.106214","DOIUrl":"10.1016/j.clinbiomech.2024.106214","url":null,"abstract":"<div><h3>Background</h3><p>Early detection of balance-related pathologies in adults using Posturography, anthropometric and personal data is limited. Our goal is to address this issue. It will enable us to identify adults in early stages of balance disorders using easily accessible and measurable data.</p></div><div><h3>Methods</h3><p>Open-source data of 163 subjects (47 males and 116 females) is used to train and test classification algorithms. Features include mean and standard deviation of the center of pressure displacement, obtained through posturography, the anthropometric and personal variables (age, sex, body mass index, foot length), and Trail Making Test scores. 75% of the data is employed for training and 25% of the data is used for testing. It is then validated using an indigenously collected dataset of healthy individuals.</p></div><div><h3>Findings</h3><p>Accuracy and Sensitivity, both, increases when anthropometric and personal variables are included alongside center of pressure features for classification. Specificity decreases slightly with the addition of anthropometric and personal variables with center of pressure displacement feature, which also affects the classification algorithms' performance. Standard deviation of the center of pressure displacement is found to be more effective than the mean value. A similar trend of the increased performance is observed during validation, except when neural networks were used for the classification.</p></div><div><h3>Interpretation</h3><p>Posturography data, Anthropometric measurements, personal data and self-assessment scales can identify balance issues in adults, making it suitable for community health centers with limited resources. Early detection prompts timely medical care, improving the management of disorders and thus enhancing the quality of life through rehabilitation.</p></div>","PeriodicalId":50992,"journal":{"name":"Clinical Biomechanics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139919007","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