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The purpose of this investigation was to examine a relationship between constraint of motion and motor output, in that use of an ipsilateral ankle foot orthosis-footwear combination maximizing constraint of ipsilateral ankle motion will minimize muscle activation. Our findings support a relationship...
Ultrasonic imaging is a safe, established and non-invasive method to visualize the position of tissues within the body. Coupling existing skin mounted motion capture markers to ultrasound sensors could allow for precise measurement of bone position and orientation, without the loss in accuracy due t...
We posit that an age-related shift toward shorter plantarflexor operating lengths functionally limits force generation, and thereby the ability of those muscles to respond to increased propulsive demands during walking. In older subjects, we found a strong and significant positive correlation betwee...
The complex anatomy of the neck creates uncertainty regarding how the central nervous system (CNS) activates individual muscles to stabilize the neck in 3-D. The CNS can tune both the activation and mechanics of muscle to preferred directions where the muscle maximally contributes to stability. In t...
Neck flexion, which is associated with neck pain development, is typically observed when an individual uses a smartphone. The purpose of this study was to determine if clinical measures and neck kinematics during smartphone use were different between those who do and do not develop neck and upper ba...
Tennis is a sport that includes multi-directional movement patterns. Tennis players need core stabilization in order to perform upper and lower limb movements effectively and to protect spinal cord at the same time. 24 tennis players (12 control, 12 training) joined in this study. Evaluation methods...
The aim of this study was to use computational simulation to investigate the effect of orthopaedic plate stiffness and its thickness, on the mechanical response of the fracture site within an osteoporotic tibia, and to determine the optimised conditions in favour of the bone healing process.
This study demonstrated that increasing cognitive load and inducing lower extremity muscular fatigue increases muscle activity despite the standing surface. Softening the shoe-surface interface does not seem to be an adequate means of reducing muscular exertion after a fatiguing workload, especially...
Wearable head impact sensors have the potential to generate field data that can be used to improve our understanding of concussive brain injury. This study explores some sources of variability that need to be considered when using these data to create injury risk functions, improve safety equipment,...
Differences in ankle joint work between foot strike patterns may influence Triceps Surae (TS) muscle metabolic energy consumption and hence whole body metabolic energy consumption. Here, we used a dynamic optimization approach to estimate muscle forces, lengths and activations of 43 lower limb muscl...
Studying purpose was to assess the relation between trunk and foot COP at the cocking phase during pitching motion. Subjects were 22 healthy men. We measured using goniometer and electronic vernier caliper at the cocking posture the horizontal abduction angle of humeral articulation (HABD), scapula ...
In recent years many efforts have been done to describe the hemodynamic in intracranial aneurysms, and how it is related to the origin and growth of this cerebrovascular disorder. Numerical simulation has become a widely used tool for the study of hemodynamic; employing idealized and realistic geome...
Understanding the mechanisms underlying human locomotion is a central question in biomechanical and motor control research. In this study, similarities in the modular control structure of different gait forms are examined. Results show for specific coordinative structures (e.g. anterior/ posterior s...
Anterior cruciate ligament reconstruction (ACLR) individuals who exhibit atypical neuromuscular control strategies during a single limb forward hop demonstrate suboptimal self-reported function related to sport specific activities compared with ACLR individuals that use neuromuscular control strateg...
The purpose of this study was to compare the differences in the dominant and nondominant shoulder and trunk range of motion in young female volleyball players. The subjects were 16 healthy female high school volleyball players, and the goniometer was used to measure the shoulder and trunk range of m...
Ankle-foot orthosis (AFO) properties, particularly stiffness, can affect gait kinematics. Because AFOs are made from viscoelastic materials, the effects of stiffness may vary at different walking speeds. However, the impact of ankle flexion speed on AFO stiffness has not been thoroughly investigated...
The Rapid Office Strain Assessment has proven to successfully quantify and reduce the risk of musculoskeletal disorders in office workers. However, since its development, many changes to typical office workstations have occurred as technology has advanced. This study incorporated those changes into ...
This study is seminal in providing long-term functional outcome evaluations of single-event multilevel surgery (SEMLS) in children with cerebral palsy (CwCP, specifically bilaterally spastic CP). It presents a novel multidimensional representation demonstrating that all sagittal joint angles, on bot...
Lately there has been some frustration with academic publishing, highlighted by Europe's "Plan S" and University of California libraries considering to unsubscribe from all Elsevier journals. With the abilities of the internet, growing presence of science on social media, and the increased use of pr...
Understanding normal ulnar geometry is important for surgeons planning corrective ulnar osteotomies. We developed a statistical shape model of the ulna to investigate sex differences in its three-dimensional geometry. The model was based on the right and left ulnae of 20 males and 20 females, isotro...
Overweight and obese children have increased knee abduction angles and moments throughout stance compared to normal weight children.
The mechanical properties of the calcaneal fat pad have been determined during plantarflexion using synchronised motion analysis and force plate systems. This study showed no significant differences in stiffness measurements between genders with respect to the left and right heels. The application o...
Concussions in youth sport are predictable and preventable. Research evaluating concussion prevention strategies to reduce the burden of injury in youth sport will be presented. Research presented will include original research findings evaluating prevention strategies in youth sport and highlights ...
To quantify balance control during walking, different stability outcome measured based on the (extrapolated) centre of mass ((X)CoM), base of support (BoS) and centre of pressure (CoP) have been proposed. Healthy controls (n=20) and patients with balance and gait problems (n=45) performed two times ...
Anterior cruciate ligament (ACL) injury is one of the most frequent sports medicine injuries and characterized by reduced muscle strength, joint instability, and proprioceptive deficits. The long-term effects of these symptoms are excessive impact forces that are associated with knee osteoarthritis....
Mobilisation is used for improving range of motion and reducing pain in patients with shoulder disorders. It is currently unclear what the underlying mechanisms of that technique are. This study aimed to assess the effect of inferior shoulder mobilisation on scapular and shoulder muscle activity, du...
The purpose of the present investigation was to examine the influence of footwear on walking stability. Twenty healthy women walked at 1.3 m/s on an instrumented treadmill. One hundred steps (50-right, 50-left) were analyzed from two walking conditions (shod, unshod). The variability of the centre o...
Joint position sense of the dominant and nondominant shoulder was measured in healthy subjects to quantify error in a joint position sense task with and without visual information. Previous studies have examined sensory differences in dominance with conflicting results. Some have shown that no diffe...
Bilateral cervical facet dislocation (BFD) with facet fracture (Fx) is a devastating neck injury that is rarely recreated experimentally. Neck muscle activation increases intervertebral shear and compression forces during cervical trauma, but the role of these combined loads during BFD is understudi...
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...
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