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The development of a product for medical use must meet a series of requirements to be used, when you want to use the product, it is necessary to perform some measurements and tests to ensure that the equipment meets the requirements satisfactorily. Being a new development, it is very important that ...
Following anterior cruciate ligament (ACL) injury, altered joint kinematics and moments are often reported, even after long rehabilitation programs, which may lead to increased risk of re-injury. Single leg hop task minimizes the assistance from the contralateral side. The aim of the study was to co...
3.8 million sports and recreational activity related concussions are estimated to occur in the United States Each year, with many occurring in American Football. Reducing concussion in Football is a priority with significant challenges, but with several methods currently under investigation. This si...
Anatomically accurate reconstruction of joint structures, including bone and cartilage, is necessary in musculo-skeletal modelling and prosthesis designs. Correspondingly, CT and MRI shall be used, possibly in combination. A single ankle specimen was analyzed by producing 3D bone and cartilage model...
This study explores the potential benefits of interacting with variable damping-defined environments to improve the trade-off between mediolateral ankle agility and stability in the frontal plane standing. While wearing an exoskeletal robot supported by a knee brace, subjects were instructed to move...
In this study, we proposed implement method between SLIP model that explains the walking dynamics well and a neural network (NN). The proposed method has two major steps. First is biomechanical model step, and second is NN process step. STEP 1. From CLM, estimate two direction of GRFs (F_v,F_ap) fro...
Dr. Finley’s research focuses on the neuromechanics and control of healthy and pathological gait. He was the first to demonstrate that learned behaviours observed during adaptation to walking on a split belt treadmill are likely driven by a preference for economical gaits. Here he will present rec...
The use of walking boots (WB) is one of the most common treatments for diverse foot and ankle injuries such as sprains of Grade II or higher, pressure ulcers, and/or plantar fascia release. WBs have been shown to be beneficial for injury recovery, however, it is important to alert users of the subse...
Knee osteoarthritis decreases the ability to perform many daily activities such as walking. Thus, individuals adapt their initial movement strategy to compensate this deficit. One such compensatory strategy is to increase the foot progression angle. In order to study its impact on the lower limb joi...
The height of the medial longitudinal arch (MLA) is a main parameter to classify foot normality and an indicator of potential injuries of the foot and ankle. The current study aimed to quantify the development of MLA under the influence of gender and normalization in school-age children in Taiwan vi...
Bones are made of complex material comprising organic components and mineral hydroxyapatite, both of which formulate the unique hierarchical structure of bone and its mechanical properties. In this study, atomic force microscopy-based imaging and indentation approaches were adopted to investigate th...
This randomized clinical trial evaluated the immediate effect of cervical spine manipulation on the maximal isometric strength of shoulder abductors. A total of 26 subjects participated where 13 subjects were randomized into the intervention group (joint manipulation of the cervical spine), and 13 s...
The influence of subtalar arthrodesis on the anteroposterior stiffness and laxity of the talocrural joint was studied in vitro. Six fresh-frozen ankle specimens with soft tissues removed following standard specimen preparation procedure were tested by a robot-based joint testing system (RJTS) which ...
Dr. Srinivasan studies energy optimization by combining human subject experiments, with simple mathematical models, and large-scale optimizations. Here he will discuss his recent work that finds that energy optimization explains a surprisingly large fraction of our locomotor repertoire.
The purpose of this study was to quantitatively measure the strain induced upon the bone by an electrically induced contraction of the muscles in order to analyse the potential of using Functional Electrical Stimulation (FES) as a method for targeted osetogenesis. With the force output of a joint du...
Our aim is to create a biologically inspired control architecture for human gait. This work combines reflexes with feedforward input from the spine. Reflexes were based on Geyer and Herr [1], except for the vastus, where a stretch reflex was modelled. Additionally, a spinal architecture with a rhyth...
Dr. Selinger’s research combines a big data approach with controlled lab experiments, and computational models of learning to study motor learning and optimization in human locomotion. Here she will discuss her recent work focused on how the nervous system discovers and learns energetically optima...
Subject-specific lateral trunk lean (LTL) gait modification (GM) decreased knee abduction moment (KAM) magnitude on average by 8.9%, although not statistically significant. There was a concurrent increase in trunk kinetics, which is indicative of increased spinal loading. Over prolonged periods, exp...
This study examined the effect of inter-cycle loading variation on cumulative tolerance in isolated spinal units. An in vitro paradigm was used to compare custom sinusoidal waveforms (i.e., consistent vs. variable amplitude) constructed with control between specimens for an equal average peak amplit...
Gait adaptability may be a predicting factor in the outcome of joint replacement surgery. Stepping targets have been used to show a difference in gait adaptability between young and older adults, however not in a test that relates to the rehabilitation of gait after surgery. The aim of this study to...
This study aimed to compare movement patterns among knee osteoarthritis (OA), knee injured and control groups during functional tasks. Injured participants demonstrated a trend to follow OA movement patterns, especially in more difficult tasks. Knee injury implies movement modification similar to OA...
Kinematic and electromyography data were collected from people without transtibial amputation (TTA) and with TTA for three prosthetic alignment conditions during sit-to-stand (STS). People with TTA had greater amputated side and lower intact side rectus femoris activity compared to people without TT...
Inter-limb leg stiffness changes during weight transfer of gait were used to evaluate the efficacy of surgical treatments on body support strategies in children with diplegic cerebral palsy (DCP). Compared to Controls, children with DCP were found to have similar linter-limb leg stiffness sharing du...
This study reports the effects of mechanical environment on the modulation of ankle impedance during the stance phase of walking. We used a robotic platform, capable of simulating different mechanical environments and providing accurate perturbations, to investigate how ankle impedance vary during w...
Muscle fibres consume metabolic energy to deliver force and do mechanical work. Less well characterized is a separate metabolic cost for cyclic force production, that is not included in current models for metabolic cost. We therefore characterized the metabolic cost for cyclic muscle force, hypothes...
This study examined the effect of a concurrent cognitive task on gait termination in older adults. Nine older adults walked and stepped down a curb, and stopped immediately after stepping down if a light stimulus was activated. Trials were performed with and without a concurrent cognitive task. We f...
The energetic cost of transport for running decreases directly with gravity level, while walking cost is only modestly affected [1]. Speed has the opposite effect: increasing walking speed results in increased cost of transport while that of running is relatively insensitive (power increases but cos...
One of the fundamental motor deficits after stroke is abnormal coordinative patterns. However, it is still unclear underlying mechanisms of the motor deficit characteristic of stroke. Here, we investigated how stroke affects individual joint contributions to the abnormal coordinative patterns during...
The present study evaluates the 3D angle between the joint moment and the joint angular velocity vectors and investigates if the ankle, Chopart and Lisfranc joints are predominantly driven or stabilized during gait. The 3D angle curves show that the three joints adapt a stabilization-resistance conf...
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