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The Spanish squat targets the knee extensors and has been suggested to be an appropriate rehabilitation exercise for debilitative knee conditions. This study provides novel empirical data on the effect of trunk inclination on the demands of the Spanish squat that has application on the progression a...
The lack of an efficient scientific framework that simplifies the analysis of socket-stump interaction is one of the key reasons why physics-based socket modelling techniques are not prevalent. Herein, we propose a novel scientific framework that generates detailed subject-specific 3D models of the ...
The aim of this study is to test and validate a novel step counter method (DiSC) based on distance and inertial measurements recorded using a single wearable prototype system (SWINGDS) applied to one of the ankles. Thirteen patients with multiple sclerosis (MS) performed a six-minute walking test (6...
Current researches related to patient-specific knee prosthesis designs are mainly mimicked the anatomical structure of femoral condyle, but the kinematics and the long-term performance are still questionable. What’s more, since the end-stage knee osteoarthritis patients are usually associated with...
Subject-specific gait retraining is an effective method to reduce the knee adduction moment (KAM) for knee osteoarthritis but current methods of selecting the specific training target are time-consuming and the final selected new gait pattern may be too awkward to be used in daily life. This paper p...
For femur fracture, patients’ fracture is treated through osteosynthesis using a femur fracture fixation plate and screws. Since screws in surgery are directly fixed in the bone, however, local damage tends to occur in the bone. As screw holes remain in removing the screws after synostosis, there ...
Tripping-related falls frequently occur at minimum foot clearance (MFC) and cause forward balance loss. In contrast, backward falls often result from slips at heel contact (HC). Previous studies have examined dynamic balance in isolated anteroposterior and mediolateral directions. The present study ...
We aimed to clarify the speed and accuracy in center of mass (COM) control during anticipatory postural adjustment (APA) and step phases in a step task where different levels of accuracy were required. Twelve subjects stepped onto stayed on bars with 2, 4, 6, and 8 cm width. The ground reaction forc...
Inertial Measurement Units (IMUs) became extremely popular for human motion analysis in the free-living environment thanks to their small size, lightweight, and long battery life [1,2]. However, IMU measures the acceleration and angular velocity in its sensor-fixed frame (SF), not the anatomical fra...
The purpose of this study was to investigate effect of shoes midsole stiffness on biomechanics of lower extremity joints during Lay-Up (LU) jumping with different stiff midsole shoes. Thirty participants who wore stiff midsole shoes and control shoes performed LU jumps. Kinematics and ground reactio...
To determine the feasibility of utilizing gyroscopic data to differentiate common gait perturbations, we compared the resultant angular velocities measured with optical motion capture (OMC) and Inertial Measurement Units (IMUs) in the feet and shank during running. The systems were tested under 4 di...
A custom-built continuous wave radar was used to record cycling movements performed by 15 healthy individuals. Doppler signatures presented in the radar signals were analyzed to extract temporal parameters of the movement. Standard motion capture was performed to validate the radar results. Large co...
During the arthroscopic operation, an assistant is often required to assist the surgeon to hold the arthroscope. Hand tremor of the assistant and the cooperation of the passive movement will affect the arthroscopic field image and affect the judgment and efficiency of the surgery. In this study, a p...
In Western riding competitions horses have to walk backward. Therefore, they change its gait pattern, which is clearly visible in the kinematics of the lower limb. This might have some ef-fects on the damping function of the pastern at the lower limbs.
Greyhounds are the fastest canine in the world and sustain unique types of injuries which are rarely seen in other breeds of dogs. Track surface is one of the primary injury contributing factors. There has been little research on the interaction of greyhound’s dynamics with the track surface. Thus...
We used switched linear dynamical systems (SLDS) to model joint angle trajectories of healthy individuals walking on a treadmill with and without functional electrical stimulation (FES). We tested the ability of the SLDS models to reproduce the kinematic trajectories based on measured the joint angl...
The margin of stability (MoS) is often quantified relative to an intended walking direction. This approach may not be suitable when the intended direction is altered, variable, or unknown. The purpose of this study was to describe and validate the approach of calculating the lateral minimum MoS rela...
Magneto-Inertial technology is an established alternative to optical motion capture for studying human movement. However, accuracy of its orientation estimation is still an open issue. In this study, we performed a concurrent validation of four common sensor fusion algorithms at three different spee...
We compared posturography and Achilles tendon shear wave speed measures during quiet standing in healthy young adults. We found that wave speed closely tracks fluctuations in the center of pressure, an observation attributable to the direct relationship between wave speed and tendon loading. Both te...
The purpose of this study was to determine if coordination variability between the trunk and pelvis during walking turns is reduced in response to fatiguing muscle exercise. The secondary purpose was to compare two statistical methods of quantifying variability; Vector Coding and the Ellipse Area Me...
Most state-of-the-art prosthetic controllers define modes of operation corresponding to terrain types such as flat-ground walking or stair ascent. This control policy can create impairments for locomotion when unique situations arise, such as in obstacle avoidance or unstructured terrain. Human loco...
A custom-built continuous wave radar was used to examine temporo-spatial gait parameters on healthy adults walking on a treadmill. Data simultaneously collected by the radar and motion capture cameras was analysed and compared to validate the radars accuracy. Excellent intra-class correlations were ...
Mechanical properties of organ-cultured rat tail intervertebral discs were characterized across the entire range of axial tension-compression. Rather than assuming the shape of the axial force-deformation curve, the stiffness-deformation relationship was assumed to follow a double logistic (U-Shaped...
This study examined how fatigue, induced by a repetitive sit-to-stand movement, affects walking balance control in young and older adults with and without performing a concurrent cognitive task. Ten young (age: 27 ± 5) and 10 older (age: 70 ± 6) adults were recruited. The results showed that parti...
This study investigates how material properties of the pelvic bone are impacted by the presence of a cancerous tumor. Orthopaedic Oncologists are often faced with the challenging decision of knowing how much surrounding bone should be resected when extracting a tumor. Conservative estimations of how...
Energy dissipation in the foot, may lead to damaging soft tissue temperature increases in at-risk individuals. We developed a standardized system for semi-automatically measuring regional temperature changes on the plantar surface following walking. This system is utilized in a cohort of three healt...
The ability to measure whole body vibration exposure in the workplace is important considering its established link to low back pain. We designed and evaluated a wearable device for measuring vibration exposure at the lower back. Experiments were performed on an electromechanical shaker to compare v...
The purpose of this study was to validate the accuracy of MilestonePod (MSP) wireless running sensors and IMeasureU inertial measurement units with custom algorithms (IMU) for subjects wearing combat boots while walking and running. Results indicate that in general, the IMU demonstrates large inaccu...
Despite the growing amount of literature suggesting a greater reliance on visual information and cognitive processing following an anterior cruciate ligament reconstruction (ACLR), no known study has investigated the interplay between cognition and visual feedback in an ACLR population. The purpose ...
The prosthesis and the stump must fit together in an optimal way for pressure to be distributed correctly. However, despite these efforts, this contact is not always the most appropriate. The contact between the stump and socket generates high pressure points, causing discomfort and damage to the st...
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