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Female urinary incontinence has been recently termed a “silent epidemic”, requiring systematic attention and a multidisciplinary approach towards economically ameliorating its impact. In this paper we examine the role of the pelvic floor (PF) in maintaining urinary continence by evaluating the dynamics produced during its voluntary and reflex activation. Analytical methods for the acquisition and...
In motor rehabilitation, the search for better methodologies is intense. In parallel, natural interaction technologies are considered to be a nice approach for rehabilitation guidance, as they can provide content for visual feedback in augmented reality. This paper describes an augmented reality physiotherapy rehabilitation system called ARkanoidAR, which was implemented using the Microsoft Kinect...
The socioeconomic impact of limb disabilities produced by injuries, traumas or congenital defects is evident in low-income countries, where there are often inadequate systems of trauma care and rehabilitation. The most medical schools in developing countries do not include a disability and rehabilitation component in their curricula. Even worst, many institutes do not have facilities or equipment...
The purpose of this study was to analyze the electromyography (EMG) signals of the Quadratus Lumborum (QL) muscle activity on leg length discrepancy (LLD) and pelvic asymmetry. So we investigated whether pelvic asymmetry might cause injuries in lumbar spine and lower extremity. This was a randomized control experiment, total 50 (25 males and 25 females) datas were analyzed. All participants were right...
Nowadays, decreasing birthrate and aging population become to be the serious social problem in Japan. Therefore, needs of assistive devices are more and more increasing. When people use such assistive devices, there is a risk that devices cost user excessive burden. So analysis and evaluation of motions and load of person who uses assistive devices are necessary. In this paper, a model to analyze...
Dynamic mechanical analysis (DMA) was carried out to understand the effect of the application of elastin on wound skin of hairless mice. Wound group, placebo group, and elastin group were selected to evaluate that effect. As the results of DMA testing, the wound and the placebo groups showed lower storage and loss moduli than the elastin group. On the result of loss tangent, there is a small difference...
In this paper, we propose a novel fatigue assessment technique using Vertical Ground Reaction Force (VGRF) signals acquired during ultra-marathon running. To achieve that goal, we performed frequency-domain on singlechannel VGRF signals on different time intervals during ultra-marathon running and tracked the features' variation. Our method was applied on single-channel VGRF signals recorded via instrumented...
In this paper, we propose guidelines and techniques for optimally handling Vertical Ground Reaction Force (VGRF) signals acquired during running. For that endeavor, we developed an algorithm that performs leg-specific signal separation in an adaptive manner such that each VGRF signal is decomposed into two equally-sized time series each being specific to one of the two legs. Our technique was applied...
Mimicking Nature becomes very popular in technology, however the approaches used for bio-imitation are not clearly defined especially in bioengineering and biomedical sciences. Most of the time, these scientific fields apply imitation principles but the interest of biomechanical assessment is underestimated. There are three main ways to mimic biological systems : biomimicry, biomimetics and bioinspiration...
The main objective of all eye movements is to keep the image of the object of interest focused. Head motion makes this objective more complex. However, the vestibular system is responsible for eye movement that compensate head motion. Simulating and analysing eye movement in coordination with head and neck movements is useful for assessing visual system contribution to discomfort in different tasks...
Corresponding to low targeting accuracy due to tissue deformation during the process of electrode insertion in sub-thalamic nucleus deep brain stimulation (DBS), biomechanical properties of brain tissue are essential to investigate. Elastic and viscoelastic biomechanical properties in post-puncture are investigated by indentation-relaxation experiment. In this paper the flat indenter with a diameter...
Investigating biomechanical properties of the cornea can have many clinical applications, including the diagnosis of keratoconus and post-refractive keratectasia. However, ascertaining the biomechanical properties of cornea remains a challenge because of the low resolution of currently available modalities cannot provide a point-to-point stiffness mapping of cornea. In this study, we reported a high-resolution...
Novel methods for determining rupture risk in abdominal aortic aneurysms (AAAs) have focused primarily on CT-based wall stress analysis using finite element models (FEMs). Recent studies have demonstrated ultrasound (US) based FEM, and the possibility of using inverse FEM analysis: matching displacements between the models and US to find patient specific aortic stiffness. This requires an accurate...
Early detection of pathological processes is crucial for the prognosis and treatment of patients, which can be facilitated through studying tissue biomechanical properties. Shear wave elastography is a technique to estimate the shear modulus of tissue. Such measurements quantify elasticity linearized around an immediate state of local stress condition, under applied nature of excitation. Stress-strain...
The biomechanics of the sclera can play a critical role in glaucoma diagnosis and monitoring new treatment methods. Previous studies have used strain elastography and investigated the relationship between scleral stiffness and intraocular pressure. However, applying shear wave elastography (SWE) to scleral tissue is challenging because sclera (100–1000 kPa) is significantly stiffer than normal soft...
The flexion and extension of human muscular doesn't only support the human's motion but it also could help in term of energy harvesting. Motion of the human body is capable to generate electrical energy with the support of suitable harvesting devices. This type of energy is very useful for those do not have access to the electrical power grid for prolonged duration. Biomechanical energy harvesting...
A virtual reality program has been developed to assess the strength and flexibility of a computer based model of a term fetus or newborn baby's neck. The software has a haptic/force feedback user interface which allows clinical experts to adjust the mechanical properties, including range of motion and mechanical stiffness of a newborn neck model, at runtime. The developed software was assessed by...
Passive prosthetic feet are not able to provide non-amputee kinematics and kinetics for the ankle joint. Persons with amputations show reduced interlimb symmetry, slower walking speeds, and increased walking effort. To improve ankle range of motion and push off, various powered prosthetic feet were introduced. This feasibility study analyzed if predefined motor reference trajectories can be used to...
Robotic prosthetic foot-ankle prostheses typically aim to replace the lost joint with revolute joints aimed at replicating normal joint biomechanics. In this paper, a previously developed robotic ankle prosthesis with active alignment is evaluated. It uses a four-bar mechanism to inject positive power into the gait cycle while altering the kinematics of the ankle joint and pylon segment to reduce...
This paper describes our efforts to employ the Microsoft Kinect as a low cost vision control system for the MIT-Skywalker, a robotic gait rehabilitation device. The Kinect enables an alternative markerless solution to control the MIT-Skywalker and allows a more user-friendly set-up. A study involving eight healthy subjects and two stroke survivors using the MIT-Skywalker device demonstrates the advantages...
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