Abstract Archive

The neural oscillator proposed by Matsuoka can generate complicated and periodic signals by some of the variable parameters and feedback signals. In this study, the relationship among the output signals, the variable parameters and feedback signals was analyzed numerically. In the analysis, a feedba...

There is limited information on the effect of foot strike angle (FSA) on the resultant ground reaction force vector angle (θR-GRF) and the leg vector angle (θL). Human participants ran on a treadmill with a forefoot strike (FF) and a rearfoot strike (RF) according to biofeedback criteria of their ...

Physics-based modeling and dynamic simulation of human eye movements has significant implications for improving our understanding of the oculomotor system. An open-source model of the human eye that can be used for kinematics and dynamics analysis is introduced. This model relies on the passive pull...

There is a wide correlation between the biomechanical studies (baropodometry) carried out in the Laboratory of Biomechatronics at CIATEC, A.C., and pelvic limb shortening identified with radiographic scans or radiometry studies.

The prime method of analyzing gait cycles with balance aiding devices has typically been restricted to laboratory controlled environments, where motion capture software or visual observation are available. Few methods for real-world gait analysis exist that do not require active human monitoring. We...

Changes in sagittal knee moments and patellofemoral contact force have been linked to the risk of patellofemoral pain(PFP). Previous studies proved that there were different loading patterns of knee joint with different foot strike patterns and surface cushioning conditions. Currently, few studies d...

Inertial measurement units (IMUs) provide an alternative to traditional data collection methods such as motion capture and force plates which can only be used in limited environments and populations. IMUs also enable the collection of more genuine movement patterns in a natural environment outside t...

The purpose of this study was to compare the differences in produced momenta and work outputs of lower limb muscles between horizontal and vertical jumps. Horizontal and vertical squat jumps were simulated using a musculoskeletal model. The simulation results suggest that the hamstrings and rectus f...

The highest prevalence of musculoskeletal disorders among women may be related to sex differences in associated biological factors such as postural biomechanics. The aim was to evaluate if there are sex differences in postures of upper limb, upper back, head and neck during a repetitive task perform...

This study determined whether active lower limb muscle volume increased when landing with load and whether it differed between sexes or landing type. Twenty male and seventeen female participants had active hip, knee and ankle muscle volume quantified when performing normal and flexed landings with ...

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...

The purpose of this study was to determine the effect of varied pelvis perturbations on walking balance and over-ground walking speed in people with incomplete spinal cord injury (iSCI). Eleven subjects with iSCI were recruited. Spatial and temporal gait parameters and muscle activities were assesse...

Cervical spine loads associated with non-injurious physical activities that involve notably asymmetrical coronal motion of the head and neck have not to date been reported in the literature. In the current study, three-dimensional forces and moments are calculated at the upper cervical spine from th...

Noncontact ACL injuries occur during dynamic movements, and females are more than twice as likely to have an ACL injury compared to males. Decision-making tasks have shown altered knee mechanics and may better represent game-like scenarios in the lab. However, it is unknown if the unanticipated stim...

Chemotherapy treatment of cancers by paclitaxel often results in peripheral neuropathy which is the main reason for patients to withdraw from the therapy. The function of a peripheral nerve depends highly on biomechanical properties of its tissues and cells. The goal of this study is to investigate ...

Segmentation of anatomical tissues from medical images is extremely time consuming and is prone to human error. Historically, automated methods have produced insufficient accuracy and have been computationally expensive. This investigation tested a custom two-stage deep learning framework that achie...

High-speed video analysis has been used to measure certain kinematic metrics during a competitive diver’s performance. However, it is time-consuming and limited in accuracy. An inertial measurement unit (IMU) may substitute video analysis. However, IMUs must be evaluated before implementation. Thi...

To develop assistive devices that can account for muscle dynamics, we developed a machine learning algorithm that measures muscle fascicle lengths in real-time from live ultrasound imaging. Our algorithm’s predictions yielded up to 95% correlation and R2 = 0.89 with respect to hand-tracked images,...

The purpose of this study is to explore how individuals with transtibial amputation walk with vs. without a toe joint in their prosthetic foot, as well as to quantify how toe joint stiffness affects gait biomechanics and metabolic cost. We created a custom foot prosthesis that enables us to systemat...

We examined the discriminant ability of features extracted from walking and running contact force data using instrumented insoles in order to optimize future classification model accuracy. Twenty-seven subjects walked and ran on four treadmills with varying deck stiffness at both self-selected and c...

We present an automatic workflow for generating patient specific finite element models of the knee from MRI. A neural network was trained on 20 segmented MRI, and tested on 5 MRIs. A custom python workflow was used to automatically create FE models. The workflow had a mean error of 0.83 mm, and on a...

Cosimulation of glenohumeral dynamics employing contact at the glenohumeral interface predicted glenohumeral head displacements during shoulder elevation similar to those reported in cadaveric studies.

The purpose of this study was to use foot pressure data, at the age of 2 years, to predict reoccurrence of deformity for children with unilateral clubfoot. Algorithms predicting overall presence of reoccurrence, repeat casting, repeat tenotomy, Achilles lengthening and tibialis anterior tendon trans...

The supraspinatus includes two distinct regions. Relationships between regional indwelling electromyography (EMG) and a surface EMG were defined during arm elevation across several factors. Sex, elevation angle and intensity influenced the relationships for both regions, while plane of elevation inf...

Use of an adaptive treadmill enables natural variation in walking speed and may be beneficial for rehabilitation applications. This study investigates the differences in plantar flexor muscle force during walking with an adaptive treadmill versus a fixed speed treadmill. While walking at self-select...

Femoral neck strength was assessed in five cadaveric human femora (age ranging 27-80) using simulated lateral impacts with a test system aligned with a CSA test standard. Prior to testing, hip-specific DXA scans were obtained to extract femoral neck BMD. Simulated lateral impacts were performed with...

A 16-week progressive foot muscle specific intervention program decreased some parameters associated with non-contact anterior cruciate ligament (ACL) and lateral ankle sprain (LAS) injury mechanisms. Changes in inter-foot and foot-shank segmental relationships were also observed.