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During the arthroscopic operation, an assistant is often required to assist the surgeon to hold the arthroscope. Hand tremor of the assistant and the cooperation of the passive movement will affect the arthroscopic field image and affect the judgment and efficiency of the surgery. In this study, a p...
In this study, a novel method for in vivo finger motion measurement was proposed. A six degree of freedom electromagnetic tracking system was used to prevent line of sight constraints. A novel landmark digitization method was used that provided accessible landmarks for in vivo use. The study involve...
This study examined whether an introduced forefoot sliding element would influence running biomechanics and performance. Rearfoot strikers performed 10 consecutive running trials on instrumented treadmill, wearing two running shoes with versus without forefoot sliding element. The present results re...
Current researches related to patient-specific knee prosthesis designs are mainly mimicked the anatomical structure of femoral condyle, but the kinematics and the long-term performance are still questionable. What’s more, since the end-stage knee osteoarthritis patients are usually associated with...
Turning gait is important to everyday activity but has yet to be fully explored. In this study a clinical dual-task (DT) assessment using a 180˚ guided turn, instrumented with an inertial measurement unit (IMU), was applied to concussed subjects. Subjects had increased turn time at 72hrs and 1wk po...
The use of platelet-rich plasma (PRP) injections in the treatment of acute Achilles tendon rupture (ATR) remains controversial. This double-blinded, randomized controlled trial aimed to compare the effectiveness of PRP versus placebo injections in non-operatively treated ATR patients. Estimates of t...
Humans typically prefer metabolically economical gait patterns, as evidenced by increases in metabolic cost that accompany large deviations from the preferred step length and step width. Alterations of the mechanical context tend to evoke changes in the preferred gait mechanics that are consistent w...
Healthy populations are often assumed to have near identical movement patterns while asymmetry is commonly associated with pathology. Many current measures of symmetry are limited to discrete events, or involve high level mathematics that do not translate well to a clinical setting. The proposed Ave...
Greyhounds are the fastest canine in the world and sustain unique types of injuries which are rarely seen in other breeds of dogs. Track surface is one of the primary injury contributing factors. There has been little research on the interaction of greyhound’s dynamics with the track surface. Thus...
We performed a pilot study that compares the following methods of visual biofeedback: filtering feedback, fading feedback, and multimodal feedback. We evaluate feedback performance by quantifying the transient response and steady state response of the subject to a new target step width. Transient st...
There are several methods for computing average vertical loading rate (AVLR) in the literature. In this analysis we developed a novel method (the 3-12% auto method) and compared it to 2 methods of computation previously established in the literature (the 3-12% method and 20-80% method). The 3 method...
Mechanical properties of organ-cultured rat tail intervertebral discs were characterized across the entire range of axial tension-compression. Rather than assuming the shape of the axial force-deformation curve, the stiffness-deformation relationship was assumed to follow a double logistic (U-Shaped...
Quadriceps weakness is a common clinical sign following anterior cruciate ligament reconstruction surgery (ACLR). We examined quadriceps strength and limb symmetry index (LSI) from different types of functional tests: isokinetic dynamometry, hop tests, and leg press. A total of 26 subjects with ACLR...
A physical model simulating the right hip joint was placed in known combinations of 3D rotations. Euler/Cardan angles were used to calculate the 3D rotations from reflective marker data, and different rotation sequences were compared to the physical model. The ‘xyz’ (proximal segment as referenc...
This study examined how fatigue, induced by a repetitive sit-to-stand movement, affects walking balance control in young and older adults with and without performing a concurrent cognitive task. Ten young (age: 27 ± 5) and 10 older (age: 70 ± 6) adults were recruited. The results showed that parti...
Subject-specific gait retraining is an effective method to reduce the knee adduction moment (KAM) for knee osteoarthritis but current methods of selecting the specific training target are time-consuming and the final selected new gait pattern may be too awkward to be used in daily life. This paper p...
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...
Reports that medial knee osteoarthritis (OA) is associated with the peak knee adduction moment during walking (pKAM) have led to interventions to reduce pKAM. However, these interventions require repeated costly gait tests to monitor pKAM changes. Thus, the objective of this study was to develop a s...
This study investigates how material properties of the pelvic bone are impacted by the presence of a cancerous tumor. Orthopaedic Oncologists are often faced with the challenging decision of knowing how much surrounding bone should be resected when extracting a tumor. Conservative estimations of how...
For femur fracture, patients’ fracture is treated through osteosynthesis using a femur fracture fixation plate and screws. Since screws in surgery are directly fixed in the bone, however, local damage tends to occur in the bone. As screw holes remain in removing the screws after synostosis, there ...
A novel method for accurately measuring carpal kinematics in a cadaveric model was developed via discreet sensors rigidly fixed to carpal bones using single attachment mounts.
Treadmills are of utmost importance in several fields of research. Treadmills can differ considerable in their dimension, motor power and belt velocity regulation [1]. Therefore, we developed a method that allows researchers to quantify instantaneous belt velocity quickly using motion capture techno...
We use robotic and cadaveric hand preparations to evaluate the efficacy of a novel passive implant mechanism in the ECRL-to-FDP transfer tendon-transfer surgery.Compared with directly suturing the donor to recipient tendons, the implant enables passive differential grasp adaptation between the index...
In Western riding competitions horses have to walk backward. Therefore, they change its gait pattern, which is clearly visible in the kinematics of the lower limb. This might have some ef-fects on the damping function of the pastern at the lower limbs.
In this study, we aimed to clarify futsal shoe outsoles mechanical properties and demonstrate its effect on resultant performances of a v-cut manoeuvre functional test. One participant performed multiple trials of a pylon course using three shoes, each with different outsole’s dynamic coefficient ...
We developed and validated a novel rheological model of anterior cruciate ligament (ACL) loading. The ACL force (FACL) responses to cadaveric knee loading were interpolated using novel basis functions and cross-terms to account for observed non-additivity of uni-planar loading mechanisms. Resulting ...
We propose that the metabolic cost of walking can be estimated from a simple mechanical model composed of centre of mass velocity redirection, body weight support, torso and swing dynamics, and foot-to-ground clearance. From human biomechanical walking data provided by the ISB 2019 metabolic cost mo...
Strength and balance exercises have already been shown to help improve stability, and thereby reduce the risk of falling in older adults. These exercises are often delivered face-to-face in a group class which is not always easy for older adults to attend. Compliance to prescription exercises at hom...
The change of the trabeculae is continuously changed by external stimulus and environment which is mechanoelectrical biosignal, since the bone fluid shear stress and flow induced by the trabeculae deformation stimulate the osteocytes for the bone modeling. The bone fluid flow is generated by mechani...
The production of prosthetic socket for a disabled person is made by the hand of the manufacturer, which makes it difficult to maintain the consistency of the quality, and the production time is lengthened and the efficiency of the work is poor. In order to overcome these problems, we have studied t...
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