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Intersegmental coordination in human slip perturbation responses J. Biomech. (IF 2.4) Pub Date : 2024-04-16 Vaibhavsingh Varma, Mitja Trkov
Intersegmental coordination (ISC) of lower limbs and planar covariation law (PCL) are important phenomena observed in biomechanics of human walking and other activities. Gait perturbations tend to cause deviation from the expected ISC pattern thus violating PCL. We used a data set of seven subjects, who experienced unexpected slips, to investigate and characterize the evolution of ISC during slip recoveries
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The biomechanical influence of transtibial Bone-Anchored limbs during walking J. Biomech. (IF 2.4) Pub Date : 2024-04-15 Amanda L. Vinson, Nicholas W. Vandenberg, Mohamed E. Awad, Cory L. Christiansen, Jason W. Stoneback, Brecca M. M. Gaffney
Individuals with unilateral transtibial amputation (TTA) using socket prostheses demonstrate asymmetric joint biomechanics during walking, which increases the risk of secondary comorbidities (e.g., low back pain (LBP), osteoarthritis (OA)). Bone-anchored limbs are an alternative to socket prostheses, yet it remains unknown how they influence multi-joint loading. Our objective was to determine the influence
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Transference of outdoor gait-training to treadmill running biomechanics and strength measures: A randomized controlled trial J. Biomech. (IF 2.4) Pub Date : 2024-04-15 Alexandra F. DeJong Lempke, Stephanie L. Stephens, Xavier D. Thompson, Joseph M. Hart, David J. Hryvniak, Jordan S. Rodu, Jay Hertel
Outdoor gait-training has been successful in improving pain and reducing contact time during outdoor running for runners with exercise-related lower leg pain (ERLLP). However, it is unclear if these adaptations translate to gold standard treadmill running and clinical strength assessments. The study purpose was to assess the influence of a 4-week outdoor gait-training intervention with home exercises
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Estimation of electrical muscle activity during gait using inertial measurement units with convolution attention neural network and small-scale dataset J. Biomech. (IF 2.4) Pub Date : 2024-04-11 Wenqi Liang, Hafiz Muhammad Rehan Afzal, Yongyu Qiao, Ao Fan, Fanjie Wang, Yiwei Hu, Pengfei Yang
In general, muscle activity can be directly measured using Electromyography (EMG) or calculated with musculoskeletal models. However, both methods are not suitable for non-technical users and unstructured environments. It is desired to establish more portable and easy-to-use muscle activity estimation methods. Deep learning (DL) models combined with inertial measurement units (IMUs) have shown great
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The need for speed – Does the force–velocity property significantly alter strain distributions within skeletal muscle? J. Biomech. (IF 2.4) Pub Date : 2024-04-09 Matthew D. DiSalvo, Silvia S. Blemker
Skeletal muscles are complex structures with nonlinear constitutive properties. This complexity often requires finite element (FE) modeling to better understand muscle behavior and response to activation, especially the fiber strain distributions that can be difficult to measure . However, many FE muscle models designed to study fiber strain do not include force–velocity behavior. To investigate force–velocity
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A new computational fluid dynamics based noninvasive assessment of portacaval pressure gradient J. Biomech. (IF 2.4) Pub Date : 2024-04-05 Zhuxiang Xiong, Xiaoze Wang, Yuling Yan, Zhan Liu, Xuefeng Luo, Tinghui Zheng
Accurate assessment of portacaval pressure gradient (PCG) in patients with portal hypertension (PH) is of great significance both for diagnosis and treatment. This study aims to develop a noninvasive method for assessing PCG in PH patients and evaluate its accuracy and effectiveness. This study recruited 37 PH patients treated with transjugular intrahepatic portosystemic shunt (TIPS). computed tomography
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The effect of amplitude normalization technique, walking speed, and reporting metric on whole-body angular momentum and its interpretation during normal gait J. Biomech. (IF 2.4) Pub Date : 2024-04-04 Nicholas G. Gomez, Julia A. Dunn, Mark A. Gomez, K. Bo Foreman
Whole-body angular momentum (WBAM) represents the cancellations of angular momenta that are produced during a reciprocal gait pattern. WBAM is sensitive to small changes and is used to compare dynamic gait patterns under different walking conditions. Study designs and the normalization techniques used to define WBAM vary and make comparisons between studies difficult. To address this problem, WBAM
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Adaptive P-Splines for challenging filtering problems in biomechanics J. Biomech. (IF 2.4) Pub Date : 2024-04-04 Andrew J. Pohl, Matthew R. Schofield, W. Brent Edwards, Reed Ferber
Suppression of noise from recorded signals is a critically important data processing step for biomechanical analyses. While a wide variety of filtering or smoothing spline methods are available, the majority of these are not well suited for the analysis of signals with rapidly changing derivatives such as the processing of motion data for impact-like events. This is because commonly used low-pass filtering
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Accuracy of conventional motion capture in measuring hip joint center location and hip rotations during gait, squat, and step-up activities J. Biomech. (IF 2.4) Pub Date : 2024-04-04 Sarah Lopez, Camille Johnson, Naomi Frankston, Ethan Ruh, Michael McClincy, William Anderst
Accurate measurements of hip joint kinematics are essential for improving our understanding of the effects of injury, disease, and surgical intervention on long-term hip joint health. This study assessed the accuracy of conventional motion capture (MoCap) for measuring hip joint center (HJC) location and hip joint angles during gait, squat, and step-up activities while using dynamic biplane radiography
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Estimation of lower back muscle force in a lifting task using wearable IMUs J. Biomech. (IF 2.4) Pub Date : 2024-04-04 Maryam Shakourisalim, Karla Beltran Martinez, Ali Golabchi, Mahdi Tavakoli, Hossein Rouhani
Low back pain is commonly reported in occupational settings due to factors such as heavy lifting and poor ergonomic practices, often resulting in significant healthcare expenses and lowered productivity. Assessment tools for human motion and ergonomic risk at the workplace are still limited. Therefore, this study aimed to assess lower back muscle and joint reaction forces in laboratory conditions using
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Limb and joint kinetics during walking in individuals with Mild-Moderate Parkinson’s disease J. Biomech. (IF 2.4) Pub Date : 2024-04-04 Emily M Hayworth, Stephanie M Casnave, Chelsea Duppen, David Rowland, Nina Browner, Michael D Lewek
Given the known deficits in spatiotemporal aspects of gait for people with Parkinson’s disease (PD), we sought to determine the underlying gait abnormalities in limb and joint kinetics, and examine how deficits in push-off and leg swing might contribute to the shortened step lengths for people with PD. Ten participants with PD and 11 age-matched control participants walked overground and on an instrumented
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Visual feedback improves propulsive force generation during treadmill walking in people with Parkinson disease J. Biomech. (IF 2.4) Pub Date : 2024-04-03 Sidney T. Baudendistel, Jason R. Franz, Abigail C. Schmitt, Francesca E. Wade, Marc C. Pappas, Ka Loong Kelvin Au, Chris J Hass
Persons with Parkinson's disease experience gait alterations, such as reduced step length. Gait dysfunction is a significant research priority as the current treatments targeting gait impairment are limited. This study aimed to investigate the effects of visual biofeedback on propulsive force during treadmill walking in persons with Parkinson's. Sixteen ambulatory persons with Parkinson's participated
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Regional shear wave speeds track regional axial stress in nonuniformly loaded fibrous soft tissues J. Biomech. (IF 2.4) Pub Date : 2024-03-31 Jonathon L. Blank, Darryl G. Thelen, Joshua D. Roth
Ligaments and tendons undergo nonuniform deformation during movement. While deformations can be imaged, it remains challenging to use such information to infer regional tissue loading. Shear wave tensiometry is a promising noninvasive technique to gauge axial stress and is premised on a tensioned beam model. However, it is unknown whether tensiometry can predict regional stress in a nonuniformly loaded
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A novel in-vitro model of intervertebral disc degeneration using hyperphysiological loading J. Biomech. (IF 2.4) Pub Date : 2024-03-31 E.D. Rivera Tapia, J.R. Meakin, T.P. Holsgrove
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Wearing a back-support exoskeleton alters lower-limb joint kinetics during single-step recovery following a forward loss of balance J. Biomech. (IF 2.4) Pub Date : 2024-03-31 Jang-Ho Park, Michael L. Madigan, Sunwook Kim, Maury A. Nussbaum, Divya Srinivasan
We assessed the effects of a passive, back-support exoskeleton (BSE) on lower-limb joint kinetics during the initiation and swing phases of recovery from a forward loss of balance. Sixteen (8M, 8F) young, healthy participants were released from static forward-leaning postures and attempted to recover their balance with a single-step while wearing a BSE (backX) with different levels of support torque
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Impact of osteoporosis and Cement-Augmented fusion on adjacent spinal levels Post-Fusion Surgery: Patient-Specific finite element analysis J. Biomech. (IF 2.4) Pub Date : 2024-03-30 Kinda Khalaf, Mohammad Nikkhoo, Shohreh Shams, Chi-Chien Niu, Chih-Hsiu Cheng
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Fully automatic tracking of native knee kinematics from stereo-radiography with digitally reconstructed radiographs J. Biomech. (IF 2.4) Pub Date : 2024-03-30 William Burton, Casey Myers, Margareta Stefanovic, Kevin Shelburne, Paul Rullkoetter
Precise measurement of joint-level motion from stereo-radiography facilitates understanding of human movement. Conventional procedures for kinematic tracking require significant manual effort and are time intensive. The current work introduces a method for fully automatic tracking of native knee kinematics from stereo-radiography sequences. The framework consists of three computational steps. First
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Combined musculoskeletal finite element modeling of femur stress during reactive balance training J. Biomech. (IF 2.4) Pub Date : 2024-03-28 Isaac Copeland, Corey Pew, David F. Graham
The purpose of this study was to determine the material stresses experienced in the femoral neck during the stepping phase of recovery from a forward loss of balance achieved both using release from a static forward lean and rapid treadmill accelerations in 8 older adults. A scalable musculoskeletal model with 23 degrees of freedom and 92 force actuators was used to calculate joint reaction forces
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A multiscale modeling study of nanoparticle-based targeting therapy against atherosclerosis J. Biomech. (IF 2.4) Pub Date : 2024-03-27 Jichao Pan, Yan Cai, Hongliang He, Ning Gu, Zhiyong Li
Although researches on nanoparticle-based (NP-based) drug delivery system for atherosclerosis treatment have grown rapidly in recent years, there are limited studies in quantifying the effects of targeting drugs on plaque components and microenvironment. The purpose of the present study was to quantitatively assess the targeting therapeutic effects against atherosclerosis by establishing a multiscale
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Trial- vs. cycle-level detrending in the analysis of cyclical biomechanical data J. Biomech. (IF 2.4) Pub Date : 2024-03-26 Todd C. Pataky, Guillaume Rao
Biomechanical time series may contain low-frequency trends due to factors like electromechanical drift, attentional drift and fatigue. Existing detrending procedures are predominantly conducted at the trial level, removing trends that exist over finite, adjacent time windows, but this fails to consider what we term ‘cycle-level trends’: trends that occur in cyclical movements like gait and that vary
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Biomechanical study of temporomandibular joints of patients with temporomandibular disorders under incisal clenching: A finite element analysis J. Biomech. (IF 2.4) Pub Date : 2024-03-26 Chunxin Yang, Haidong Teng, Bingmei Shao, Zhan Liu
Temporomandibular disorders (TMD) encompass a collection of pathologies. Within the multitude of etiological factors contributing to TMD, mechanical factors hold significant importance. The aim of this investigation was to assess the magnitude and distribution of stresses encountered by the temporomandibular joints (TMJs) during incisal clenching among TMD patients while also elucidating the mechanical
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Real-world data capture of daily limb loading using force-sensing insoles: Feasibility and lessons learned J. Biomech. (IF 2.4) Pub Date : 2024-03-26 Katherine L. Hsieh, Kristen M. Beavers, Ashley A. Weaver, S. Delanie Lynch, Isaac B. Shaw, Paul W. Kline
Force-sensing insoles are wearable technology that offer an innovative way to measure loading outside of laboratory settings. Few studies, however, have utilized insoles to measure daily loading in real-world settings. This is an ancillary study of a randomized controlled trial examining the effect of weight loss alone, weight loss plus weighted vest, or weight loss plus resistance training on bone
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Multi-scaled temporal modeling of cardiovascular disease progression: An illustration of proximal arteries in pulmonary hypertension J. Biomech. (IF 2.4) Pub Date : 2024-03-24 Young-Dae Shim, Mei-Cen Chen, Seongmin Ha, Hyuk-Jae Chang, Seungik Baek, Eun-Ho Lee
The progression of cardiovascular disease is intricately influenced by a complex interplay between physiological pathways, biochemical processes, and physical mechanisms. This study aimed to develop an in-silico physics-based approach to comprehensively model the multifaceted vascular pathophysiological adaptations. This approach focused on capturing the progression of proximal pulmonary arterial hypertension
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Implementing an accelerometer-based pelvis segment for low back kinetic analyses during dynamic movement tasks J. Biomech. (IF 2.4) Pub Date : 2024-03-24 Jackie D. Zehr, Jessa M. Davidson, Jack P. Callaghan
An accelerometer-based pelvis has been employed to study segment and joint kinematics during scenarios involving close human-object interface and/or line-of-sight obstructions. However, its accuracy for examining low back kinetic outcomes is unknown. This study compared reaction moments and contact forces of the L5S1 joint calculated with an accelerometer-based and optically tracked pelvis segment
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Post-angioplasty remodeling of coronary arteries investigated via a chemo-mechano-biological in silico model J. Biomech. (IF 2.4) Pub Date : 2024-03-24 Meike Gierig, Pierfrancesco Gaziano, Peter Wriggers, Michele Marino
This work presents the application of a chemo-mechano-biological constitutive model of soft tissues for describing tissue inflammatory response to damage in collagen constituents. The material model is implemented into a nonlinear finite element formulation to follow up a coronary standard balloon angioplasty for one year. Numerical results, compared with available clinical data, show that the model
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The influence of rotator cuff tear type and weight bearing on shoulder biomechanics in an ex vivo simulator experiment J. Biomech. (IF 2.4) Pub Date : 2024-03-20 Jeremy Genter, Eleonora Croci, Birgit Oberreiter, Franziska Eckers, Dominik Bühler, Dominic Gascho, Andreas M. Müller, Annegret Mündermann, Daniel Baumgartner
Glenohumeral biomechanics after rotator cuff (RC) tears have not been fully elucidated. This study aimed to investigate the muscle compensatory mechanism in weight-bearing shoulders with RC tears and asses the induced pathomechanics (i.e., glenohumeral translation, joint instability, center of force (CoF), joint reaction force).
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Extended physiological proprioception is affected by transhumeral Socket-Suspended prosthesis use J. Biomech. (IF 2.4) Pub Date : 2024-03-20 Julia A. Dunn, Bob Wong, Sarina K. Sinclair, Heath B. Henninger, Kent N. Bachus, K. Bo Foreman
The objective of this study was to define targeted reaching performance without visual information for transhumeral (TH) prosthesis users, establishing baseline information about extended physiological proprioception (EPP) in this population. Subjects completed a seated proprioceptive targeting task under simultaneous motion capture, using their prosthesis and intact limb. Eight male subjects, median
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A numerical study on the siphonic effect of enhanced external counterpulsation at lower extremities with a coupled 0D-1D closed-loop personalized hemodynamics model J. Biomech. (IF 2.4) Pub Date : 2024-03-19 Qi Zhang, Ya-hui Zhang, Li-ling Hao, Xuan-hao Xu, Gui-fu Wu, Ling Lin, Xiu-li Xu, Lin Qi, Shuai Tian
Enhanced external counterpulsation (EECP) is a treatment and rehabilitation approach for ischemic diseases, including coronary artery disease. Its therapeutic benefits are primarily attributed to the improved blood circulation achieved through sequential mechanical compression of the lower extremities. However, despite the crucial role that hemodynamic effects in the lower extremity arteries play in
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The influence of women’s age and fall history on foot and lower limb kinematics during transition step descent J. Biomech. (IF 2.4) Pub Date : 2024-03-19 Emily E. Gerstle, Kristian O'Connor, Kevin G. Keenan, Brooke A. Slavens, Stephen C. Cobb
Falls are a major public health concern, with older women being at the greatest risk to experience a fall. Step descent increases the likelihood of a fall injury, yet the influence of age and fall history on lower extremity kinematics have not been extensively studied. The purpose of this study was to examine lower extremity and foot kinematics of women with and without a fall history during single
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Effect of smartphone use on cervical spine stability J. Biomech. (IF 2.4) Pub Date : 2024-03-18 Eunjee Kim, Donghyun Song, Dasom Park, Hyorim Kim, Gwanseob Shin
Using a smartphone often involves a sustained head-forward tilt posture, which may deteriorate the mechanism of muscle reaction efficiency or reduce the stiffness of connective tissues of the cervical spine. These changes in muscular and connective tissues can impair cervical spine stability and contribute to developing neck pain symptoms. In this experiment, change in the cervical spine stability
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From theory to practice: Monitoring mechanical power output during wheelchair field and court sports using inertial measurement units J. Biomech. (IF 2.4) Pub Date : 2024-03-17 Marit P. van Dijk, Marco J.M. Hoozemans, Monique A.M. Berger, H.E.J. Veeger
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Evaluation of trunk muscle coactivation predictions in multi-body models J. Biomech. (IF 2.4) Pub Date : 2024-03-15 Alice Caimi, Stephen J. Ferguson, Dominika Ignasiak
Musculoskeletal simulations with muscle optimization aim to minimize muscle effort, hence are considered unable to predict the activation of antagonistic muscles. However, activation of antagonistic muscles might be necessary to satisfy the dynamic equilibrium. This study aims to elucidate under which conditions coactivation can be predicted, to evaluate factors modulating it, and to compare the antagonistic
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Markerless motion capture provides accurate predictions of ground reaction forces across a range of movement tasks J. Biomech. (IF 2.4) Pub Date : 2024-03-15 Glen A. Lichtwark, Robert W. Schuster, Luke A. Kelly, Stewart G. Trost, Alina Bialkowski
Measuring or estimating the forces acting on the human body during movement is critical for determining the biomechanical aspects relating to injury, disease and healthy ageing. In this study we examined whether quantifying whole-body motion (segmental accelerations) using a commercial markerless motion capture system could accurately predict three-dimensional ground reaction force during a diverse
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A static posturography guide to implementing time-to-boundary J. Biomech. (IF 2.4) Pub Date : 2024-03-15 Sutton B. Richmond, Kevin D. Dames
The emergence of time-to-boundary provides an advanced representation of the spatiotemporal characteristics of postural control through the estimation of the time required for the center of pressure to reach the boundary of the base of support. Time-to-boundary has demonstrated its utility in several healthy and clinical adoptions; however, unknown inconsistencies among studies exist. Text and graphical
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Statistical shape analysis and computational modeling reveal novel relationships between tibiofemoral bony geometry and knee mechanics in young, female athletes J. Biomech. (IF 2.4) Pub Date : 2024-03-14 Mitchell G.A. Wheatley, Andrew D. Pearle, David Z. Shamritsky, Jacob M. Hirth, Danyal H. Nawabi, Thomas L. Wickiewicz, Bruce D. Beynnon, Carl W. Imhauser
Young female athletes participating in sports requiring rapid changes of direction are at heightened risk of suffering traumatic knee injury, especially noncontact rupture of the anterior cruciate ligament (ACL). Clinical studies have revealed that geometric features of the tibiofemoral joint are associated with increased risk of suffering noncontact ACL injury. However, the relationship between three-dimensional
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Mild untreated hypercholesterolaemia affects mechanical properties of the Achilles tendon but not gastrocnemius muscle J. Biomech. (IF 2.4) Pub Date : 2024-03-14 Brooke K Coombes, Monica Hanna, Kaelah A. Thompson, Michel W. Coppieters, Taylor J.M. Dick, Ricardo J Andrade, Lee Barber
Tendon xanthoma and altered mechanical properties have been demonstrated in people with familial hypercholesterolaemia. However, it is unclear whether mild, untreated hypercholesterolaemia alters musculotendinous mechanical properties and muscle architecture. We conducted a case-control study of adults aged 50 years and over, without lower limb injury or history of statin medication. Based on fasting
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Inter-trial variability is higher in 3D markerless compared to marker-based motion capture: Implications for data post-processing and analysis J. Biomech. (IF 2.4) Pub Date : 2024-03-13 Brian Horsak, Kerstin Prock, Philipp Krondorfer, Tarique Siragy, Mark Simonlehner, Bernhard Dumphart
Markerless motion capture has recently attracted significant interest in clinical gait analysis and human movement science. Its ease of use and potential to streamline motion capture recordings bear great potential for out-of-the-laboratory measurements in large cohorts. While previous studies have shown that markerless systems can achieve acceptable accuracy and reliability for kinematic parameters
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Full-length radiograph based automatic musculoskeletal modeling using convolutional neural network J. Biomech. (IF 2.4) Pub Date : 2024-03-09 Junqing Wang, Shiqi Li, Zitong Sun, Qicheng Lao, Bin Shen, Kang Li, Yong Nie
Full-length radiographs contain information from which many anatomical parameters of the pelvis, femur, and tibia may be derived, but only a few anatomical parameters are used for musculoskeletal modeling. This study aimed to develop a fully automatic algorithm to extract anatomical parameters from full-length radiograph to generate a musculoskeletal model that is more accurate than linear scaled one
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Jumping towards field-based ground reaction force estimation and assessment with OpenCap J. Biomech. (IF 2.4) Pub Date : 2024-03-09 Jasper Verheul, Mark A. Robinson, Sophie Burton
Low-cost and field-viable methods that can simultaneously assess external kinetics and kinematics are necessary to enhance field-based biomechanical monitoring. The aim of this study was to determine the accuracy and usability of ground reaction force (GRF) profiles estimated from segmental kinematics, measured with OpenCap (a low-cost markerless motion-capture system), during common jumping movements
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The study of loading mode with in-vitro fatigue testing for mitral annuloplasty ring J. Biomech. (IF 2.4) Pub Date : 2024-03-08 Hui Zuo, Wentao Feng, Xiaolan Tang, Zhou Li, Yubo Fan
To maintain the physiological dynamics of the mitral annulus, mitral annuloplasty rings (MAR) must be flexible. Enhanced flexibility implies decreased resistance to fatigue and potential for fatigue fracture. This study established new methods to test the flexible fatigue life of MAR in-vitro using numerical analysis; the purpose is that the fatigue test could reflect the real stress distribution in-vivo
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Notes on the margin of stability J. Biomech. (IF 2.4) Pub Date : 2024-03-08 Carolin Curtze, Tom J.W. Buurke, Christopher McCrum
The concept of the 'extrapolated center of mass (XcoM)', introduced by Hof et al., (2005, J. Biomechanics 38 (1), p. 1–8), extends the classical inverted pendulum model to dynamic situations. The vector quantity XcoM combines the center of mass position plus its velocity divided by the pendulum eigenfrequency. In this concept, the margin of stability (MoS), i.e., the minimum signed distance from the
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Altered foot placement modulation with somatosensory stimulation in people with chronic stroke J. Biomech. (IF 2.4) Pub Date : 2024-03-07 Ethan B. Schonhaut, Keith E. Howard, Camden J. Jacobs, Heather L. Knight, Alyssa N. Chesnutt, Jesse C. Dean
Many individuals who experience a stroke exhibit reduced modulation of their mediolateral foot placement, an important gait stabilization strategy. One factor that may contribute to this deficit is altered somatosensory processing, which can be probed by applying vibration to the involved muscles (e.g., the hip abductors). The purpose of this study was to investigate whether appropriately controlled
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Gastrocnemius medialis and Achilles tendon properties do not differ between children with unilateral or bilateral spastic cerebral palsy J. Biomech. (IF 2.4) Pub Date : 2024-03-07 Andreas Habersack, Martin Svehlik, Bernhard Guggenberger, Markus Tilp, Annika Kruse
Spastic cerebral palsy (SCP) is a common neurodevelopmental disorder in children, which can be categorized into unilateral and bilateral subtypes. Most studies examining the muscle-tendon properties of the lower extremities in individuals with SCP do not distinguish between subtypes. However, spastic muscle morphology is an important determinant for its function. Therefore, differences in muscle-tendon
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The effect of trapeziometacarpal joint passive stiffness on mechanical loadings of cartilages J. Biomech. (IF 2.4) Pub Date : 2024-03-06 Thomas Valerio, Jean-Louis Milan, Benjamin Goislard de Monsabert, Laurent Vigouroux
Hypermobility of the trapeziometacarpal joint is commonly considered to be a potential risk factor for osteoarthritis. Nevertheless, the results remain controversial due to a lack of quantitative validation. The objective of this study was to evaluate the effect of joint laxity on the mechanical loadings of cartilage.
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The impact of backpack load on adolescent’s stair descent gait J. Biomech. (IF 2.4) Pub Date : 2024-03-03 Zijun Lu, Chuangui Mao, Yuanyuan Tan, Tao Liu, Xinglu Li, Zhengao Li, Wenfei Zhu, Yuliang Sun
This study investigates the impact of increasing backpack load on the gait of adolescents during stair descent. Sixteen healthy male students (age = 12.9 ± 0.6 years) were required to descend the stairs in 4 loaded conditions. The kinematic, kinetic, and EMG data were collected synchronously and gait parameters, especially indicators of balance control, were analyzed. The posterior tilt angles (COM-COP
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Human-in-the-loop optimization of rocker shoes via different cost functions during walking J. Biomech. (IF 2.4) Pub Date : 2024-02-28 Thijs Tankink, Juha M. Hijmans, Raffaella Carloni, Han Houdijk
Personalised footwear could be used to enhance the function of the foot–ankle complex to a person’s maximum. Human-in-the-loop optimization could be used as an effective and efficient way to find a personalised optimal rocker profile (i.e., apex position and angle). The outcome of this process likely depends on the selected optimization objective and its responsiveness to the rocker parameters being
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Markerless gait analysis through a single camera and computer vision J. Biomech. (IF 2.4) Pub Date : 2024-02-28 Hanwen Wang, Bingyi Su, Lu Lu, Sehee Jung, Liwei Qing, Ziyang Xie, Xu Xu
The assessment of gait performance using quantitative measures can yield crucial insights into an individual's health status. Recently, computer vision-based human pose estimation has emerged as a promising solution for markerless gait analysis, as it allows for the direct extraction of gait parameters from videos. This study aimed to compare the lower extremity kinematics and spatiotemporal gait parameters
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Prepared for landing: A simple activation strategy scales muscle force to landing height J. Biomech. (IF 2.4) Pub Date : 2024-02-24 Nicolai Konow, Thomas J. Roberts
Before landing from a jump or fall, animals preactivate muscles to stiffen their limb joints but it is unclear how muscles tune limb stiffness and how collision forcefulness is anticipated. We measured electromyography and force from the lateral gastrocnemius muscle during landings in turkeys, an animal model that allows for direct measurements of muscle force. Many studies of landings in humans and
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Musculoskeletal model degrees of Freedom: Frontal plane constraints are hindering our understanding of human movement J. Biomech. (IF 2.4) Pub Date : 2024-02-24 Hunter J. Bennett PhD, Joshua T. Weinhandl PhD, Zachary A. Sievert PhD
Induced acceleration analyses have expanded our understanding on the contributions of muscle forces to center of mass and segmental kinematics during a myriad of tasks. While these techniques have identified a subset of major muscle that contribute to locomotion, most analyses have included models with only one frontal plane degree of freedom (dof) actuated by the hip joint. The purpose of this study
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Biomechanical comparison of composite and cadaveric humeri models in experiments on operated humeral shaft fractures J. Biomech. (IF 2.4) Pub Date : 2024-02-24 Patricia R. Melvin, Benjamin M. Wheatley, Patrick J. Schimoler, Alexander Kharlamov, Mark C. Miller, John J. Elias, Gregory T. Altman
A study was undertaken to determine how well contacting fracture fragments of composite bone replicated the behavior of fracture fragments in real bone. Ten composite and ten real humeral diaphyses were transected and reconstructed with limited-contact dynamic-compression plates. Two screws were placed on each side of the transection site and a calibrated electronic sensor sheet was placed between
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Impact of variations in swimming velocity on wake flow dynamics in human underwater undulatory swimming J. Biomech. (IF 2.4) Pub Date : 2024-02-24 Yusaku Nakazono, Hirofumi Shimojo, Yasuo Sengoku, Hideki Takagi, Takaaki Tsunokawa
Increasing the velocity of the lower-limb movement is crucial for improving underwater undulatory swimming (UUS) velocity. However, the underlying mechanism of how these movements influence swimming velocity have remained unclear. This study aimed to clarify the relationship between changes in swimming movement and the resulting changes in flow field as a result of changes in test flow velocity ()
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Association between fat and fat-free body mass indices on shock attenuation during running J. Biomech. (IF 2.4) Pub Date : 2024-02-24 Bernard X.W. Liew, Xuqi Zhu, Xiaojun Zhai, Stuart A. McErlain-Naylor, Christopher McManus
High amplitudes of shock during running have been thought to be associated with an increased injury risk. This study aimed to quantify the association between dual-energy X-ray absorptiometry (DEXA) quantified body composition, and shock attenuation across the time and frequency domains. Twenty-four active adults participated. A DEXA scan was performed to quantify the fat and fat-free mass of the whole-body
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Development of a head-weighted injury criterion for evaluation of multiple types of AIS 4+ injuries for vulnerable road users J. Biomech. (IF 2.4) Pub Date : 2024-02-23 Yong Han, He Wu, Di Pan, Liang Su, Liangliang Shi, Fang Wang
Vulnerable Road users (VRUs) often suffer multiple fatal head injury types simultaneously in road accidents. In this study, a head-weighted injury criterion (HWIC) was proposed for assessing the risk of head AIS 4+ injuries considering multiple injury types. Firstly, the kinematic characteristics of VRUs in the 50 in-depth accidents were reconstructed by using multi-body system models, and head injuries
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Scapular motion during shoulder joint extension movement J. Biomech. (IF 2.4) Pub Date : 2024-02-23 Takanao Shirai, Tomohito Ijiri, Toshiaki Suzuki
A few reports on scapular motion during shoulder joint extension exist. Understanding the normal motion of shoulder joint extension may be useful in evaluating and treating patients with diminished or minimal shoulder joint extension. Therefore, this study aimed to identify scapular motion during shoulder joint extension movement in a sitting position. Shoulder joint extension movement in the sitting
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Shear shock wave injury in vivo: High frame-rate ultrasound observation and histological assessment J. Biomech. (IF 2.4) Pub Date : 2024-02-22 Sandhya Chandrasekaran, Francisco Santibanez, Tyler Long, Tim Nichols, Jason Kait, Ruth Vorder Bruegge, Cameron R. ‘Dale’ Bass, Gianmarco Pinton
Using high frame-rate ultrasound and ¡1 sensitive motion tracking we previously showed that shear waves at the surface of and brains develop into shear shock waves deep inside the brain, with destructive local accelerations. However post-mortem tissue cannot develop injuries and has different viscoelastodynamic behavior from tissue. Here we present the ultrasonic measurement of the high-rate shear
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Effects of running skill and speed on limb coordination during submaximal and maximal sprinting J. Biomech. (IF 2.4) Pub Date : 2024-02-22 Tyler D. Whitacre, David J. Stearne, Kenneth P. Clark
In locomotion, the relative phasing of the limbs changes with speed and provides valuable insight to neuromuscular control of gait. At present, it is unknown if individuals trained in sprinting coordinate their limbs differently than runners from other athletic backgrounds. Therefore, we aimed to characterize the effects of speed and skill on lower limb coordination. Twenty-five physically active (PA)
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Biomechanical behavior of the lower limbs and of the joints when landing from different heights J. Biomech. (IF 2.4) Pub Date : 2024-02-22 Thibaut D. Toussaint, Bénédicte Schepens
Landing from a jump is a challenging task as the energy accumulated during the aerial phase of the jump must be fully dissipated by the lower limbs during landing; the higher the jump height, the greater the amount of energy to be dissipated. In the present study, we aim to understand (1) how the biomechanical behavior is tuned as a function of the mechanical demand, and (2) the relationship between
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Subject-specific material properties of the heel pad: An inverse finite element analysis J. Biomech. (IF 2.4) Pub Date : 2024-02-22 Vara Isvilanonda, Ellen Y. Li, Evan D. Williams, Peter R. Cavanagh, David R. Haynor, Baocheng Chu, William R. Ledoux
Individuals with diabetes are at a higher risk of developing foot ulcers. To better understand internal soft tissue loading and potential treatment options, subject-specific finite element (FE) foot models have been used. However, existing models typically lack subject-specific soft tissue material properties and only utilize subject-specific anatomy. Therefore, this study determined subject-specific
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Dynamic assessment of spine movement patterns using an RGB-D camera and deep learning J. Biomech. (IF 2.4) Pub Date : 2024-02-22 Jessica Wenghofer, Kristen HE Beange, Wantuir C Ramos Jr, Matthew P Mavor, Ryan B Graham
In clinical practice, functional limitations in patients with low back pain are subjectively assessed, potentially leading to misdiagnosis and prolonged pain. This paper proposes an objective deep learning (DL) markerless motion capture system that uses a red–green–blue-depth (RGB-D) camera to measure the kinematics of the spine during flexion–extension (FE) through: 1) the development and validation
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Development of an implantable trapezium carpal bone replacement for measuring in vivo loads at the base of the thumb J. Biomech. (IF 2.4) Pub Date : 2024-02-21 Joseph J. Crisco, Julia A. Henke, Daniel G. McDermott, Rohit Badida, Amy M. Morton, Josephine M. Kalshoven, Douglas C. Moore
Understanding the loads that occur across musculoskeletal joints is critical to advancing our understanding of joint function and pathology, implant design and testing, as well as model verification. Substantial work in these areas has occurred in the hip and knee but has not yet been undertaken in smaller joints, such as those in the wrist. The thumb carpometacarpal (CMC) joint is a uniquely human