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Fall-related traumatic brain injuries (TBI) are a major health concern in older adults. However, there is little information known about the age-related differences in head impacts during a fall. The current investigation found that physically fit older adults had a greater proportion of head impact...
Ergonomically, it is important to understand the benefits and pitfalls of each available alternative or ergonomic seat design to better prevent workplace-associated LBP . However, due to the overwhelming number of alternative or ergonomic seat designs, and individual studies often proving each oneâ€...
A stability of the elderly population is considered as a major factor for fall risk assessment. A dynamic stability of the elderly population has not been extensively studied compared to a static one due to a technical difficulty. In this study, the zero moment point method (ZMP) is used for analysi...
This abstract expands upon fall detection paradigms to form a more concrete understanding of what is considered a fall. Data was gathered by a waist mounted inertia sensor, consisting of a tri-axis gyroscope and tri-axis accelerometer, from falling events, Full Motion Falls (FMF) and Partial Motion ...
Asymmetric loading of unilateral bone-anchored limb prostheses in walking animals has been attributed to low power production at the passive ankle prosthesis due to high stiffness of the prosthetic foot. We compared power developed by a bone-anchored prosthesis with stiff and compliant feet during w...
This aim of this study is to use an infrared-assisted trunk accelerometer-based gait analysis system to real-time investigate and compare gait quality of chronic stroke patient with healthy participants in the teaching hospital. Compared with heathy participants, walking speed, cadence, step length,...
This study presents a novel approach towards balance assessment during continuous perturbed walking conditions with complex external perturbation profiles. Stability measures defined in this study are based on a seven-segment model of the human body in the sagittal plane.
Gait analysis is commonly used to assess differences in walking between groups of adults or to evaluate changes in adults. In order to determine true differences between groups or time points, reliability and minimum detectable differences (MDD) are needed. This study evaluated within-day and betwee...
Three-point jump shot is a necessary skill for basketball players. However, the injuries often occur while landing. This injury may be caused by an accident while competing or practicing sports.
The Intrepid Dynamic Exoskeletal Orthosis (IDEO) has been utilized as an alternative to amputation for patients with lower extremity trauma. Two distinct versions of the device have been built; one that has laminated rods and one modular device that has a bolted on strut. This study utilizes the uni...
The purpose of this study was to compare the changes in gait spatio-temporal variables during metronome walking in healthy young adults and elderly groups. In the metronomic walking, the mean and variability of stride time were decreased in young adults group, but the mean of stride length and strid...
In this validation study we investigated the L5/S1 moment estimation performance of an ambulatory measurement system: inertial measurement suit (Xsens) and instrumented force shoes. A top-down (starting at hands) and a bottom-up (starting at feet) inverse dynamic approach were tested. As a reference...
Collecting and analyzing single view 2D videos could serve as a clinically feasible surrogate to assessing kinematics with 3D motion capture, which is typically used for laboratory research. The purpose of this study was to develop a novel algorithm that tracks markers in 2D videos, and to test the ...
An analytic theory is developed that determines the conditions for sagittal plane rotation (referred to as a “pitchoverâ€) of a mountain bike and rider. The model assumes a rigid geometry of the bike and rider, but energy loss is approximated using a variable coefficient of restitution. Two confi...
Comminuted, intra-articular distal tibia/fibula fractures remain a surgical challenge. It has been suggested that plates be applied on the compression side of the fracture; hence, medial plates for varus fracture patterns. No prior biomechanical investigations have examined this in a model that incl...
Principal component analysis (PCA) [1] was used as a pattern recognition tool to detect principal modes of variability in whole body movement patterns during performance of the deep squat (DS), right hurdle step (RHS) and left hurdle step (LHS). PCA successfully identified features of the DS and hur...
Bone loading due to daily physical activity over one week, was quantified from accelerometer data. Moderate-to-vigorous loading was positively associated with bone health of the left proximal femur. Adopting this level of activity in daily living may have sustained benefits for healthy ageing of bon...
In-depth exploration of movement variability provides a window into neuromotor control. This study examined movement variability differences between the preferred kicking and stance limbs in healthy persons performing unipedal hopping under typical and challenging conditions. Participants maintained...
This study examines the biomechanical and patient reported outcomes for patients using an Intrepid Dynamic Exoskeletal Orthosis (IDEO) whom are one year post rehabilitation. It is unknown how well these devices are being used and how these patients feel they are doing compared to other patients who ...
According to the World Health Organization, the North American population has the highest incidence of hip joint osteoarthritis (OA). Gait limitations are commonly observed in the context of hip OA. This study aimed at assessing the effect of an intra-articular (IA) injection of hyaluronic acid (HA)...
We tested the effects of age and lateral target distance on reaction time during precision stepping. Compared to young adults, older adults have more missed steps and slower reaction times during reactive lateral stepping in walking. Surprisingly, these apparent deficits, which may relate to an inab...
Individuals with a history of whiplash-associated dysfunction (WAD) possess sensorimotor disturbances and a disruption in dynamic standing balance. However, trunk sway reactions have not been carefully investigated between a WAD group and control subjects. The results of this study indicated that th...
This paper presents a novel ergonomic design for the 1st metatarsophalangeal joint (1st MTPJ) stiffness measurement system. Although several studies focused on the experimental measurement of the 1st MTPJ range of motion, little attention has been given to the design of the measurement device. Based...
Rearfoot (RF) and non-rearfoot strike walking (NRFSW) data from a homogenous population were collected to analyze distal foot joints kinematics. With a multi-segment foot model, kinematic differences were found at the ankle and midtarsal (MT) joint during the two walking conditions. The results may ...
Material slippage forms a major issue in the biomechanical testing of soft tissues. We here present a clamping technique utilizing 3D printing technology which allows to test soft tissues in a highly standardized and high throughput manner. Results from image correlation and scanning electron micros...
Sea turtles are often involved in propeller accidents and get caught as fishery bycatch where substantial injury also due to predatory attach are an all too often occurring consequence. Mutilated turtles are often unable to manoeuvre them self-back to the water surface due to partial or total limb l...
Professional basketball players experience a high rate of game-related injuries and a large number of non-contact injuries have been documented. Neuromuscular risk factors have provided strong theoretical support to clinical observations, in relation to non-contact Anterior Cruciate Ligament (ACL) i...
Duchenne muscular dystrophy (DMD) is a genetic disease characterized by muscle degeneration and fibrosis, often leading to respiratory failure. Diaphragm sections from mdx and healthy mice were biaxially tested to determine passive properties before and after enzymatic collagen digestion. We found t...
Tensile properties of native and acellular human dura mater are of increasing interest for transplant surgery. The biomechanical properties of 18 cadaver-matched pairs of acellular and native human dura mater samples were investigated here. An individually-established osmotic stress protocol and the...
Split sole shoes have a special outsole that is not connected at the mid-foot region, allowing higher foot flexibility. The purpose of this study is to examine the biomechanical effects of the split sole design on a normal gait through kinematic analysis and electromyography (EMG). The absence of a ...
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