Abstract Archive

A medializing calcaneal osteotomy (MCO) is frequently performed to correct adult-aquired flatfoot deformities, but a lack in reliable 3D data associated to clinical/surgical parameters still exists. This study was aimed at reconstructing relevant 3D surgical parameters using a Cone-Beam CT (CBCT) in...

For analysing the biomechanics of gait steady state velocity should be reached. With ramp construction the walkway is limited and it is not clear if the same rules for reaching speed steady state as for level walking apply over a range of downhill inclines. Therefore, temporo-spatial, kinematic and ...

Glenohumeral stability is maintained by articular geometry, capsuloligamentous restraint, and rotator cuff muscle activation. Many rotator cuff force profiles have been employed in the cadaveric setting to maintain stability. This study aims to compare the glenohumeral joint stability afforded by co...

We have previously shown that volumetric imaging of native intervertebral disc (IVD) is possible using synchrotron x-ray microtomography (sCT) [1]. Subsequently, we have imaged an intact disc under sequential compression for structural deformation characterisation and strain measurement. Our latest ...

Soldiers routinely conduct load-carriage and associated physical training that elicits high physical demands and are believed to be the primary cause of musculoskeletal injury. Appropriately designed physical training can help mitigate injury risks. This study aimed to assess changes in lower-limb j...

Incorporating realistic skeletal kinematics and tissue property data into musculoskeletal models can improve the accuracy of mechanical load estimates. However, inclusion of subject-specific skeletal kinematics in vivo in the models may heighten the demand on the quality of tissue property input dat...

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...

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...

Individuals with spinal cord injuries (SCI) who use manual wheelchairs (MWCs) are more susceptible to shoulder pathology than able-bodied individuals. A gap in knowledge exists in understanding how shoulder function of MWC users during daily living compares with the able-bodied population. To start ...

The diaphragmatic ligament (DL) provides the pressure barrier separating thorax from abdomen in mammals. It has a microarchitecture that resists hoop stresses and herniation and provides a biaxial elastic layer of elastin. Modelling of the microarchitecture reveals how the ligament could transpose i...

People with dementia have impairments in gait that are associated with an increased risk of falls. The aim of this study was to investigate the relationship between gait features extracted from repeated, frequent gait assessments and future falls in older people with dementia. We found that gait ins...

We developed a novel load carriage system that allows weight carried in a backpack to oscillate in the medial-lateral direction while simultaneously generating electricity from the carried weight’s oscillations. We use the energy harvesting capabilities of the device to control carried mass oscill...

We proposed a ground reaction force (GRF) estimation method from the input of RGB video capturing human walking. To convert kinematic motion data from a video into kinetic GRF data, we used a spring-loaded inverted pendulum (SLIP) model that reflects the relationship between the center of mass (CoM)...

Bone healing and (re)modelling depends on the interaction of mechanical loading with molecular processes. Multimodal imaging technology is needed to better understand these interactions, which could play a key role in novel treatments and therapies. We have developed an improved local in vivo enviro...

Knowledge of effective control strategies for reducing the metabolic cost of walking with active exoskeletons is limited. Here, we used a hip exoskeleton emulator to assess how stiffness and reference angle of a simplified impedance controller influence metabolic cost. In general, impedance paramete...

A computational model was developed to simulate hopping at different gravity levels. The hopping frequencies that minimized energetic cost at each gravity level were determined. Even though the optimal frequency was not expected to change with gravity, we observed that lower gravity levels had lower...

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...

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...

We present initial performance metrics of a robotic system for in vitro simulation of 3D physiologic human shoulder motion. Scapular and humeral positions and orientations in the cadaver were driven by 3D human shoulder motions acquired using a biplane fluoroscopy system. An industrial robot base al...

Examining the effects of prolonged running on gait mechanics is needed to understand the multifactorial nature of running injury. However, the window of opportunity to capture the effects of a sub-exhaustive prolonged run on gait is unknown. Five runners completed overground motion capture before an...

The basis for identifying stance and swing phase to classify gait requires the accurate estimation when major gait events such as initial contact and toe off occur. This study examines the ability of the Beta Process Autoregressive Hidden Markov Model (BP-AR-HMM) to estimate initial contact and toe ...

Maintaining joint stability is crucial for proper simulation of glenohumeral joint kinematics in the cadaveric setting. This study uses updated methodology to isolate the native intraarticular pressure’s role in glenohumeral joint stability.

Heel pad can absorb shock during gait as heel pad can dissipate the energy. According to the researches, the stiffer heel pad has the elevated energy dissipation. In this study, the heel pad stiffness variation was measured as the distributed force on the heel pad was increasing. As a result, the he...

Excessive hip adduction and knee valgus are common movement impairments that underlie various lower-limb injuries in runners. The purpose of the current study was to determine the associations among frontal plane hip and knee kinematics during running, hip abductor strength, and pelvis width. Result...

Soldiers perform physically demanding tasks that predispose them to an elevated risk of musculoskeletal injury (MSKI). Understanding joint loading during commonly performed tasks, e.g., load carriage, may improve MSKI prevention efforts, yet current research is limited. Using EMG-informed neuromuscu...

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.

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...

The one-step self-calibrating bundle adjustment (BA) is a calibration approach for high-speed biplanar videoradiography (HSBV). This study demonstrates that the BA, in comparison to a modified direct linear transformation (DLT) calibration, results in kinematic differences and reduced bias. This is ...

The force velocity relation (f-v-r) of the human gastrocnemius medialis was assessed using maximum voluntary preactivation prior to shortening at different angular velocities. Compared to previous work, preloading resulted in increased torque outputs and clearly decreased slope characteristics of th...