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The shoulder joint most often is modelled as a spherical joint that requires accurate localization of the glenohumeral joint center (GHJC) with many clinical, biomedical, and biomimicry implications from injury evaluation to arthroplasty to robotics. We used ultrasound (US) imaging to locate the cen...
In this case study, we sought to determine whether undesired muscle coactivation limits the upper limb workspace, and whether the coactivation varies with stroke severity. During a voluntary reaching task with different supporting forces on upper limb, changes in muscle activation levels were record...
The RETRAINER arm system is a rehabilitation device used to facilitate the recovery of arm functionality post stoke. During a randomized controlled trial with 68 subjects, usability and reliability of the system were recorded. This contribution formally evaluates data collected during the trials and...
Second metatarsal (2MT) stress fracture is a common and burdensome injury amongst runners, however understanding of the risk factors leading to injury is limited. Finite Element (FE) modelling represents a viable biorealistic alternative to invasive studies and simple beam theory models. This study ...
Determining weights among terms in the cost function for walking was formulated as a bilevel optimization problem (BLO). The direct collocation (DC) method effectively solved the lower level problem, making it practical to solve the BLO using a nested evolutionary approach.
Running Specific Prostheses (RSP) used by amputee athletes for sprinting and long jumping have a large effect on athlete performance and health. This study reports about the development and test of a set of instrumented RSP (iRSP) that could be used on the field for data collection of block start, s...
Modern wearable fitness trackers contain on-device inertial measurement units (IMUs) that measure user activity metrics. These trackers, however, typically require access to a GPS-enabled device (such as a smartphone) to measure speed and distance. This presents a problem when GPS signal is sparse o...
Quantitative measures related to mechanical strength of the anterior cruciate ligament (ACL) graft are needed for timely return-to-sports decisions after the ACL reconstruction surgery (ACLR). Ultra-short echo-time (UTE)-T2* magnetic resonance imaging (MRI) was used to study structural changes in gr...
Acquiring the shape of foot plantar surface is critical to perform anatomical measurements, for objective diagnosis of foot morphological alterations and to design custom orthotics and footwear. Whereas laser scanners are currently the gold-standard for accurate 3D digitization of body parts, these ...
In this paper it is presented a simplified cost function (CF) that can be used to determine the pedaling cadence that minimizes the muscular stress in cycling. With respect to similar CF, the proposed one requires less experimental data to be calculated, thus it can be preferable in the characteriza...
Head stabilization has been considered an important variable for motor control strategies, however, is not habitual include it in clinical gait analysis. The research goal of this study was to analyze the stability of the position of the head during the heel strike and toe-off events of the gait cyc...
This presents the capabilities and recent features of ArtiSynth (www.artisynth.org), a free, open source 3D modeling system developed at the University of British Columbia to support combined multibody and finite element (FEM) simulation. It provides a large selection of modeling components together...
Self-report measures and objective motion capture are some of the methods to evaluate upper extremity (UE) function. The Kinect camera offers portable and low-cost motion capture capabilities. The purpose of this study was to determine the association between actual UE functional movement obtained b...
This paper discusses challenges and opportunities for biomechanics researchers who are integrating wearable sensor data with biomechanical modelling or machine learning approaches in the context of understanding injury mechanisms. Example applications include a framework for integrating body worn in...
Prospective authors are invited to submit manuscripts reporting original unpublished research and recent developments in the topics related to the conference. It is required that the manuscript follows the standard IEEE camera-ready format (IEEE standard format, double column, 10-point font). Submis...
We examined the functional role of intramuscular coherence in relation to changes in spatiotemporal gait parameters during split-belt walking adaptation. We found that corticospinal drive measured by intramuscular coherence in the tibialis anterior muscle changed with adaptation, and that increased ...
The paper presents an example of a successful use of 3D motion analysis for forensic purposes, and tries to show the cases in which this analysis is helpful and offers opportunities to law enforcement agents. In the present case of a shotgun hunter a fundamental question was asked - was there someon...
This presentation follows up the keynote presentation of the Teaching Symposium, which highlighted the benefits of engaging students in the classroom through the use of active learning techniques. In this presentation, we focus on the “Jigsaw” technique and share one easily adaptable classroom a...
The objective of this study was to evaluate the accuracy of a commercially available low cost inertial motion capture system (IMC). Four subjects equipped with seventeen inertial measurement units (IMU) performed manual handling of boxes for about 35 minutes. An optoelectronic system was used as a g...
A human activity recognition system using wearable sensor data that can detect dance specific activities (jumping and leg lifting tasks) and quality of movement, such as ground reaction force was developed, using a machine learning approach. This system allows for the measurement of specific trainin...
Ankle injuries are a frequent setback to athletes across a range of sports and identifying risk factors or groups at greater risk of injury is important in preventing such injuries. The purpose was to identify sex, leg and sport differences in ankle joint angles and moments during common athletic mo...
The injury biomechanics of wheelchair lacrosse remains unknown. Thus, this study sought to characterize upper extremity kinematic differences in the overhead throw between able-bodied and wheelchair lacrosse players. Results suggest significant differences occur in glenohumeral joint flexion and ext...
The use of signal classification techniques to accurately classify¶ activities of daily living has gained importance in assistive¶ technologies. The aim of this paper was to implement different¶ classification techniques to identify user intent from inertial¶ measurement units (IMUs) attached to...
Traditionally, sensors used to control powered prostheses have either been incorporated into the residual limb or built into the socket that is worn by the user—no additional instrumentation is required to control the prosthesis. Minimizing instrumentation was viewed as a requirement for clinical ...
In vivo muscle biomechanical properties have been classically inferred from inverse dynamics or measurements of joint torque performed using ergometers. These measures provide information about the combined behavior of several structures (e.g., muscles, tendons, nerves, skin) acting around a given j...
Knee braces have been proposed to prevent anterior cruciate ligament (ACL) injuries, and musculoskeletal (MS) models can be used to assess the effect of such braces on joint mechanics. Therefore, the aim of this study was to use MS simulations to estimate the effect of an in silico ACL injury preven...
To better understand the effects of fatigue on running biomechanics, data were collected using an inertial measurement unit (IMU) for 28 subjects running a marathon race. During one marathon, however, one male recreational runner sustained a running-related injury in his left calf muscle and retired...
Walking deficits are common following stroke, yet typically used clinical and functional assessments fail to adequately identify their source. We previously developed a Comprehensive Locomotion Index (CLI) that uses objective measurements and differentiates functional status among individuals with c...
Biomechanics simulators must be validated before use to ensure accuracy and confidence in all future studies. A novel biomechanics simulator was validated with the use of optical motion tracking. The application of pure moments and accurate displacement control was confirmed.
Participants’ kinematics were collected using two motion capture systems (Xsens (inertial), Vicon (optical)) while performing a series of occupationally-relevant military-based movements. Principal component analysis (PCA) was used to detect variance within the three-dimensional marker trajectorie...
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