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Fatigue related to wheelchair propulsion is a likely risk factor for shoulder pain in persons with spinal cord injury (SCI). Interventions should target persons injured later in life and improve muscular activation and propulsion technique.
In this paper, we present a novel smart wearable and wireless body-fixed inertial sensor (i-Sens) based design for estimation of joint kinematics in the sagittal plane. Preliminary testing has been done on normal volunteers with this bodyworn i-Sens sensors kept at knee and hip level on one side. Th...
Using maximum height squat jumping as an example task, it was shown that optimization of neural inputs to a largish-scale musculoskeletal model in which the actuators are represented by Huxley-type muscles, results in macroscopic behaviour similar to that of an otherwise identical model with Hill-ty...
The study successfully developed and validated an automated identification of autistic postural control patterns using a machine learning approach. In general, simpler machine learning algorithms displayed higher accuracy rates compared to more complicated ones. The use of machine learning may provi...
With prescription of a carbon-fiber Intrepid Dynamic Exoskeletal Orthosis (IDEO), patients receive specialized functional training. Presumably, this increases the capacity to perform work in the brace and decreases demand in the remaining lower extremity constituents. By looking at the absolute brac...
Personalized surgical treatment of the foot such as customize artificial bones and customized joint replacements, rely on the morphology of the bones of the contralateral side. This approach is based on the implicit assumption that there is high level of symmetry in the tarsal bones of an individual...
Sports-related concussion (SRC) and concurrent neck pain (NP) is one of the most common and serious injuries in the United States. Prevention strategies to target modifiable intrinsic risk/protective factors are lacking. From a joint stability perspective, it is of interest to examine whether neck m...
Current strength training interventions post-stroke appear to provide limited benefits to improving gait function. One potential reason is the focus on muscle groups that provide small contributions to propulsion during gait. This study aimed to determine the impact of muscle strength and balance on...
This study determined the impact of different ankle braces on both sexes’ knee biomechanics during a single-leg cut. With the lace-up brace, both sexes altered knee biomechanics that may impact knee injury risk during the cut. All participants decreased peak knee internal rotation angle, while fem...
The influence of heel pad and shoe mechanical properties on the ground reaction forces were examined during the impact phase of running. Heel pad mechanical properties were measured in cadaver heel pads under a range of conditions reflecting how the heel pad can be surrounded in a shoe. These mechan...
Uneven terrain causes fluctuations in walking speed. Some fluctuations follow the physical height change of each step, but humans might also actively adjust their speed in anticipation of upcoming terrain [1]. Simultaneity makes these two effects difficult to separate, but speed fluctuations over a ...
This study used principal component analysis to identify key movements that contribute to ground reaction forces in sports. The relative importance of fundamental movement features for the ground reaction force profile was task-dependent, making generalised load quantification across different sport...
Subject-specific shoulder joint models can be used as clinical tools in pre-surgery planning as well as post-surgery rehabilitation domains. We performed a comparison of muscle mechanics between shoulder joint models that have generic and subject-specific muscle insertions. Ten healthy cadaveric sho...
Recent developments in medical imaging allow for the non-invasive assessment of intervertebral disc properties (biochemical and biomechanical) and spinal arthrokinematics through the use of quantitative magnetic resonance imaging (MRI) and biplane radiography, respectively. This talk will highlight ...
High peak axial tibial acceleration has been associated with tibial stress fracture in gait laboratory studies. Mobile monitoring indicates tibial acceleration increases when running outdoors compared to in the laboratory. Thus, careful interpretation of field-based values is needed with replication...
Spatiotemporal gait asymmetries are a common feature of walking post-stroke. Although reducing asymmetry is a common objective of rehabilitation, the functional benefits of improving symmetry are not well understood. Here, we determined how manipulation of step length asymmetry influenced dynamic ba...
Osteoarthritis (OA) is characterized by the painful degeneration of diarthrodial joints and is the leading contributor to disability worldwide. OA disproportionately affects individuals with obesity. Traditionally, the relationship between OA and obesity has been explained by increased loading due t...
A multiscale modelling approach, which combines musculoskeletal simulations of a person’s gait and finite element analysis (FEA), can be used to predict proximal femoral growth. Before this workflow can be used in patient populations to answer clinically-relevant questions, it is of utmost importa...
Osteoarthritis (OA) is prevalent, debilitating and costly condition that affects many joints in humans. OA onset can occur post joint trauma, e.g. anterior cruciate ligament rupture and reconstruction (ACLR), or from joint abnormality, e.g. femoroacetabular impingement (FAI). Once OA is established ...
The aim of this study was to investigate the capacity of foot-worn inertial and magnetic sensors to detect hurdle crossings and provide a detailed spatiotemporal running analysis of a 400 meters hurdling race. The results showed that the flight phase duration combined with the foot orientation or wi...
Finite element models have been used to study the mechanical responses of the equine hoof. The hoof is made up different tissues, including the sole, flexor and extensor tendons, frog, navicular bone, middle phalanx, hoof wall, distal phalanx, laminar junction, and digital cushion [1]. These tissues...
Advanced age influences muscle fiber composition and can potentially lead to declines upper extremity function. Ultrasound shear wave elastography provides direct measures of muscle mechanics, providing new insights into how both biological age and function influence muscle stiffness. The current st...
Dynamic in vivo tracking of foot bone motion is challenging due to occlusions of the many small, close-packed bones. In this study, we investigated image resolution of dynamic biplanar videoradiography data and whether it affects the performance of bone tracking when using CT-derived models. Downsam...
Maximal back extension force of the participants was measured using a dynamometer while standing barefoot and on top of two insole conditions (AUTO and DELTA insoles). Only DETLA insole demonstrated a significant positive effect on back strength. We found that most subjects improved their force prof...
The objective of our study was to study the impact of a gripping aid on the kinematics and the functional motor capacities of the hand, in healthy subjects. Our hypothesis was that this spherical device could stabilize the first commissure of the hand and induce kinematic changes. A sample of 19 hea...
Recent studies demonstrated that transverse loading (FG) of a muscle resulted in a considerable reduction of maximum isometric muscle force (ΔFim). Here we tested if a Hill-type muscle model assuming an identical gearing G between both ΔFim and FG as well as lifting height of the load (Δh) and lo...
Rowing involves continuous repetitive motion and high intensity loading on the glenohumeral (GH) joint. These factors significantly influence performance and injury propagation. This is the first study to specifically explore three-dimensional shoulder biomechanics with motion capture and musculoske...
In order to analyze the golf swing, it is necessary to judge the point of the backswing top and the impact, and to divide the swing section. In this study, we propose a method that estimates each point in golf swing using only single sensor at various parts of the body and compares it with the most ...
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