Abstract Archive

Knee kinetics were measured in a cadaveric simulation of drop landing, in which clinically-relevant anterior cruciate ligament (ACL) injuries were obtained. A principal component analysis (PCA) was performed on the knee kinetics to identify the most relevant parameters linked to injury. The findings...

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...

For individuals with cerebral palsy (CP) who experience spasticity, selective percutaneous myofascial lengthening (SPML) represents a minimally-invasive surgery targeting connective tissue surrounding muscle that may improve joint range-of-motion and walking ability. These techniques contrast with s...

Fragility fractures pose a massive healthcare burden worldwide. Low bone quality is a major determinant of fracture risk. Bone strength, using computed-tomography based subject-specific finite-element (CT-SSFE) analysis, estimates bone quality more accurately than dual-energy X ray absorptiometry ba...

In the last two decades, quantitative magnetic resonance imaging (qMRI) has grown into a powerful tool for exploring in-vivo biomechanical and functional properties of the musculoskeletal system. However, most qMRI methods are developed and maintained in-house, which results in a lack of transparent...

Individuals after anterior cruciate ligament reconstruction (ACLR) walk using aberrant mechanics, (e.g., smaller involved knee flexion angles and moments and medial tibiofemoral joint under-loading) linked to the early development of osteoarthritis. Limited research has studied the relationship betw...

We present a systematic source of error affecting the measurement of optoelectronic stereophogrammetric sys-tems (OSS), hereinafter called the camera occlusion arte-fact (COA). The COA takes place when the view of a mark-er is partially or completely occluded to one or more cam-eras. In these condit...

The study of the coordination of classical ballet dancers is of great relevance because this group does activities that can generate a higher asymmetric overuse in certain joints or muscles. The aim of this study is to evaluate the coordination variability in the classical ballet dancers during runn...

Fundamental mechanisms that dictate the risk of spine injury, such as basic movement patterns, are affected by cognitive interference. Spine intersegmental angular change was recorded following a mechanical perturbation applied at the hands, both with and without the presence of an additional cognit...

The objective of this study was to evaluate the validity of using inertial measurement units (IMUs) to measure kinematics in the basketball free throw and to determine whether differences in technique across player calibres can be identified using these variables. Five wearable IMUs recorded 3D acce...

A probabilistic evaluation of scapulohumeral muscle functional roles revealed a high degree of sensitivity in moment arms and lines of action to alterations in musculoskeletal geometry in healthy adults. Comparisons of model-predictions against published data highlight the need to validate lines of ...

Spine kinematics are often recorded in vivo by tracking motion of multi-segment regions (e.g. T12 to S1). Many models of the spine must distribute T12/S1 motion across segmental levels, commonly by assuming linear proportions. This raises concern when modelling non-sagittal plane movements as 3-D an...

Lower extremity stance phase peak joint moments were compared for people with a unilateral transtibial amputation (TTA) running with daily-use (DUPs) and running-specific prostheses (RSPs). RSPs generated greater plantarflexion moments due to their design. Prosthetic limb knee and hip extension mome...

PST13

Post-traumatic osteoarthritis (OA) is especially common in the trochlear cartilage of the patellofermoral (PF) joint after anterior cruciate ligament reconstruction (ACLR). The effect of walking mechanics on OA after ACLR is established in the tibiofemoral joint, but not in the PF joint. Our purpose...

The association between asymmetries in quadriceps strength and ground reaction forces (GRF) during gait was evaluated in 11 individuals with acute anterior cruciate ligament reconstruction (ACL-R). Results indicate quadriceps weakness is associated with reduced GRF acutely following surgery. Restora...

Slip-induced falls are a major public health concern as approximately 25% of older adults who fall will fracture their hip [1]. There is a paucity of research investigating the upper extremity responses to a slip. The purpose of the current study was to characterize the frontal and sagittal excursio...

Real-time sonified biofeedback has the potential to facilitate skill acquisition related to balance and successful turns. Turning is an essential skill for dancers and pedestrians. However, in order to turn, people must achieve conflicting mechanical objectives. Specifically, people need to concurre...

Because the anterior cruciate ligament (ACL) injuries occurred during sport activities imply severe consequences for athletes and the risk of reinjury in the same and in the controlateral knee is higher when returning back on the sport field, the development of screening methods to investigate neuro...

In the lab setting, individuals with lower limb amputation (LLAs) have slower walking speed and cadence than non-amputees. However, these measures only represent a small portion of the person’s mobility during daily life. We collected walking data during the daily lives of LLAs and able-bodied con...

Here we present a new musculoskeletal model of the guinea fowl pelvic limb. We use the model to explore how activation and compliance interact to influence the operating lengths and force capacity of muscle.

In sim approaches that integrate in vivo, in vitro, and in silico techniques to optimize healthcare strategies can accelerate medical advances. The present study shows that frontal plane in vivo knee kinematics identify those at risk for anterior cruciate ligament (ACL) injury; and, when combined wi...

Fragility fractures pose a massive healthcare burden worldwide. Low bone quality is a major determinant of fracture risk. Bone strength, using computed-tomography based subject-specific finite-element (CT-SSFE) analysis, estimates bone quality more accurately than dual-energy X ray absorptiometry ba...

PST3

Lesser quadriceps function is moderately associated with longer periods of support during gait in individuals with obesity. Further work is needed to evaluate if increasing quadriceps function in individuals with obesity will improve temporal gait characteristics associated with postural instability...

Persons in law enforcement often encounter physically demanding tasks while working. However, this population has also been shown to have increased risk of cardiovascular disease and injury. We had 20 participants perform self-assessment of fitness then quantitatively measured cardiovascular fitness...

The aim of the present study was to analyze joint and segment coordination and coordination variability during gait of faller and non-faller older adults at different speeds (preferred walking speed (PWS), 120% of PWS and 80% of PWS) through vector coding technique (VC). Thirty-one young adults, 22 ...

We investigated the effect of anterior cruciate ligament (ACL) injury on knee kinematics during walking using a musculoskeletal simulation. Motion data and ground reaction forces of five subjects during walking were captured. A detailed knee model with fourteen ligaments was developed and validated ...

A kinematic analysis of vaulting in comparison with normal walking was performed as 20 participants walked over level ground with and without a brace restricting knee flexion on the right side. It was determined that vaulting results in significantly different plantarflexion and dorsiflexion ankle a...

Wearables enable continuous monitoring of gait in real-world environments over an extended period of time (e.g., week). Previous findings show that in-lab and real-world measures differ; however, it is not fully clear why. This presentation will describe these gaps and illustrate how metrics based o...