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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...
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...
Kinetic data acquired from force plates embedded in moving platforms naturally contain artifacts called inertial components; however, their removal requires knowledge of the system’s inertial properties. Our objective was to: develop a method for estimating the inertial properties and force plate ...
The purpose of this study was to quantify the individuality of knee kinematics during running by examining the level of similarity between closely matched runners. Our results suggest that it becomes easier to identify similar runners as the size of a candidate pool increases; however, there is a li...
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...
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...
Children with Autism Spectrum Disorder (ASD) have been shown to exhibit gait abnormalities when compared to children with typical development (TD). Despite this phenomenon, few discernible gait patterns have been revealed among children with ASD. Therefore, no generalized gait characteristics have b...
High knee flexion postures, despite their association with increased joint loading, are frequently adopted in occupational childcare. This study sought to quantify the frequency and depth of high knee flexion postures adopted by childcare workers in order to evaluate their increased risk of knee ost...
The windlass mechanism of the human foot is a well known anatomical feature that causes the height of the medial longitudinal arch (MLA) to rise in response to toe dorsiflexion under constant load.¶ It is interpreted as a stiffening mechanism which is hypothesized to work by increasing the moment a...
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...
Disease-induced impaired hand function leads reduced quality of life and is frequently assessed by physicians in routine care of scleroderma patients. Hand movements are complex and current clinical assessments are subjective or inaccurate. A mixed cohort of scleroderma patients and healthy controls...
Reverse total shoulder arthroplasty (RSA) surgery is an effective treatment strategy for patients with varying shoulder deficiencies. The purpose of this study was to quantify the distribution of bone density in the scapulae of patients undergoing reverse shoulder arthroplasty (RSA) to guide optimal...
Surface electromyograms (EMG) are susceptible to motion artifacts, especially during dynamic non-isometric contractions. A novel method is presented for detecting motion artifact contamination in EMG recordings. Specifically, root mean square (RMS) amplitudes of EMG recordings with two high-pass cor...
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