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https://www.readbyqxmd.com/read/28227747/split-belt-adaptation-and-gait-symmetry-in-transtibial-amputees-walking-with-a-hybrid-emg-controlled-ankle-foot-prosthesis
#1
Oliver A Kannape, Hugh M Herr, Oliver A Kannape, Hugh M Herr, Oliver A Kannape, Hugh M Herr
Our ability to automatically adapt our walking pattern to the demands of our environment is central to maintaining a steady gait. Accordingly, a large effort is being made to extend and integrate this adaptability to lower-limb prostheses. To date, the main focus of this research has been on short term adaptation, such as in response to a terrain transition or a sudden change in the environment. However, long term adaptation and underlying sensorimotor learning processes are critical to optimizing walking patterns and predictively changing our gait when faced with continued perturbations...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227637/measurement-of-the-passive-stiffness-of-ankle-joint-in-3-dof-using-stewart-platform-type-ankle-foot-device
#2
Kenta Nomura, Teru Yonezawa, Hiroshi Mizoguchi, Hiroshi Takemura, Kenta Nomura, Teru Yonezawa, Hiroshi Mizoguchi, Hiroshi Takemura, Kenta Nomura, Hiroshi Mizoguchi, Teru Yonezawa, Hiroshi Takemura
This paper presents a method to measure the passive stiffness of an ankle joint in three degrees of freedom (DOF) under two motion speeds (1 Hz and 5 degree/s) using a developed Stewart platform-type device. The developed device can reproduce input motions of the foot in 6 DOF by controlling six pneumatic linear motion actuators. We used the device to measure the passive stiffness of an ankle joint undergoing three kinds of motion, namely dorsi-plantar flexion, inversion-eversion, and adduction-abduction. The measured values of the passive stiffness of the ankle joint in dorsiflexion that we obtained agreed well with that obtained in a previous study, indicating that the developed device is useful for measuring the passive stiffness of ankle joint...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227240/measurement-of-shank-angle-during-stance-using-laser-range-finders
#3
Pouya Amiri, Luke J MacLean, Robert E Kearney, Pouya Amiri, Luke J MacLean, Robert E Kearney, Robert E Kearney, Luke J MacLean, Pouya Amiri
Ankle joint stiffness, the dynamic relationship between the joint angle and the torque acting about it, plays an important role in the control of upright stance. In order to identify the contribution of ankle joint stiffness to stance control, ankle joint must be perturbed externally. One way to do this is to displace the foot that will cause shank movement. For identification, the ankle angle must be measured with high accuracy, for which we need to measure both foot and shank angles. However, most motion capture systems do not have the resolution and accuracy needed to measure the small ankle joint movements that occur during stance...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227214/activity-recognition-in-patients-with-lower-limb-impairments-do-we-need-training-data-from-each-patient
#4
Luca Lonini, Aakash Gupta, Konrad Kording, Arun Jayaraman, Luca Lonini, Aakash Gupta, Konrad Kording, Arun Jayaraman, Luca Lonini, Konrad Kording, Arun Jayaraman, Aakash Gupta
Machine learning allows detecting specific physical activities using data from wearable sensors. Such a quantification of patient mobility over time promises to accurately inform clinical decisions for physical rehabilitation. There are two strategies of setting up the machine learning problem: detect one patient's activities using data from the same patient (personal model) or detect their activities using data from other patients (global model), and we currently do not know if personal models are necessary...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227187/estimation-of-heart-rate-from-foot-worn-photoplethysmography-sensors-during-fast-bike-exercise
#5
Delaram Jarchi, Alexander J Casson, Delaram Jarchi, Alexander J Casson, Alexander J Casson, Delaram Jarchi
This paper presents a new method for estimating the average heart rate from a foot/ankle worn photoplethysmography (PPG) sensor during fast bike activity. Placing the PPG sensor on the lower half of the body allows more energy to be collected from energy harvesting in order to give a power autonomous sensor node, but comes at the cost of introducing significant motion interference into the PPG trace. We present a normalised least mean square adaptive filter and short-time Fourier transform based algorithm for estimating heart rate in the presence of this motion contamination...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227176/a-novel-method-to-assess-angle-sensor-performance-for-wearable-exoskeletal-joint-kinematics
#6
Nicholas B Bolus, Geza F Kogler, Omer T Inan, Nicholas B Bolus, Geza F Kogler, Omer T Inan, Geza F Kogler, Omer T Inan, Nicholas B Bolus
Full range of motion (ROM) at a joint is necessary for efficient and adaptive movement; as such, it is an essential clinical evaluation measure for assessing an individual's motor function, which can be affected by any number of musculoskeletal injuries and neuropathies. Measurement of joint ROM in the clinic has classically been accomplished statically through the use of a manual goniometer. More recent efforts in the fields of prosthetics and orthotics have demonstrated the potential utility of wearable systems (e...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226959/evaluation-of-a-variable-resistance-orthotic-knee-joint
#7
Andrew Herbert-Copley, Edward D Lemaire, Natalie Baddour, Andrew Herbert-Copley, Edward D Lemaire, Natalie Baddour, Andrew Herbert-Copley, Natalie Baddour, Edward D Lemaire
Knee-ankle-foot orthoses (KAFOs) are full leg braces for individuals with knee extensor weakness, designed to support the person during weight bearing activities by preventing knee flexion. KAFOs typically result in an unnatural gait pattern and are primarily used for level ground walking. A novel variable resistance orthotic knee joint, the Ottawalk-Variable Speed (OWVS), was designed to address these limitations. This paper presents a pilot test to evaluate the OWVS functional performance during walking and stair descent...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226473/alterations-in-cardiovascular-system-under-artificially-simulated-microgravity-preliminary-study
#8
Aleksandr A Fedotov, Sergey A Akulov, Anna S Akulova, Aleksandr A Fedotov, Sergey A Akulov, Anna S Akulova, Aleksandr A Fedotov, Anna S Akulova, Sergey A Akulov
The main goal of this work is to study the alterations occurred in human cardiovascular system under artificially simulated microgravity by using special short-arm centrifuge. We have used arterial blood pressure, ankle-brachial pressure index and accelerated photoplethysmography approach to determine the effects of artificially simulated microgravity on vascular system. The group of 30 healthy male volunteers was studied in a short-arm human centrifuge at two levels of gravity gradients along head-to-foot direction (Gz): normal gravity gradient of 1 Gz and so called microgravity mode of 0...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225220/efficacy-of-ruscus-extract-hmc-and-vitamin-c-constituents-of-cyclo-3-fort%C3%A2-on-improving-individual-venous-symptoms-and-edema-a-systematic-review-and-meta-analysis-of-randomized-double-blind-placebo-controlled-trials
#9
Stavros K Kakkos, François A Allaert
INTRODUCTION: Venoactive drugs (VADs) are considered an important component of the medical (conservative) treatment of chronic venous disorders (CVDs). However, the efficacy of certain VADs on one or more individual leg symptoms may have not been extensively studied to justify a high level or grade of recommendation in guidelines on CVD. The aim of the present systematic review and meta-analysis was to study the effectiveness of VADs containing Ruscus across the spectrum of defined venous symptoms...
April 2017: International Angiology: a Journal of the International Union of Angiology
https://www.readbyqxmd.com/read/28222622/management-of-acute-achilles-tendon-rupture-with-tendon-bundle-technique
#10
Chun-Guang Li, Bing Li, Yun-Feng Yang
Objective * These authors contributed equally to this work. To explore tendon-bundle technique for treating Achilles tendon rupture with no defects. Methods Patients with full unilateral Achilles tendon rupture with no defects were included. The Achilles tendon medial edge surgical repair approach was used, revealing horsetail-like rupture bundles. Tendon bundles were anatomically realigned and repaired end-to-end using 5-0 sutures. Patients were followed-up for 1 year, and assessed for differences between the repaired versus healthy limb...
February 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28222618/three-dimensional-printing-in-the-surgical-treatment-of-osteoid-osteoma-of-the-calcaneus-a-case-report
#11
Xiang Ren, Liu Yang, Xiao-Jun Duan
Surgical excision is the traditional treatment for osteoid osteoma. However, the complexity of the foot anatomy makes a satisfactory outcome challenging. Difficulty in localizing the lesion intraoperatively may result in either incomplete tumor resection or excessive bone loss. To date, no published report has described the use of three-dimensional printing in the surgical treatment of osteoid osteoma of the calcaneus. In this case, we printed a three-dimensional model of the calcaneus of a 17-year-old female patient with a 2-year history of night pain in the lateral aspect of the hindfoot and ankle, evaluated the lesion as an osteoid osteoma, and designed a surgical guiding plate...
February 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28222571/the-edurep-approach-plus-manual-therapy-for-the-management-of-insertional-achilles-tendinopathy-a-case-report
#12
Francesco Sartorio, Anna Zanetta, Giorgio Ferriero, Elisabetta Bravini, Stefano Vercelli
BACKGROUND: Insertional Achilles tendinopathy (IAT) is a challenging overuse disorder. The aim of this case report was to study the feasibility of a comprehensive rehabilitative approach according to the Education, Unloading, Reloading, and Prevention (EdUReP) framework combined with Instrument-Augmented Soft Tissue Mobilization (I-ASTM). METHODS: An active 51-year-old man patient with chronic IAT was studied. Clinical assessment battery was composed by visual analogue scale for pain during the Achilles tendon palpation test, passive straight leg raise test, single leg hop test, Patient-Specific Functional Scale, and Foot and Ankle Ability Measure...
February 21, 2017: Journal of Sports Medicine and Physical Fitness
https://www.readbyqxmd.com/read/28222565/carbon-modular-orthosis-ca-m-o-an%C3%A2-innovative-hybrid-modular-ankle-foot-orthosis-to-tune-the-variable-rehabilitation-needs-in-hemiplegic-cerebral-palsy
#13
E Tavernese, M Petrarca, G Rosellini, E Di Stanislao, A Pisano, G Di Rosa, E Castelli
BACKGROUND: Hemiplegic Celebral Palsy (CP) children commonly use AFO orthoses as walking aids. It is known that AFOs may have a detrimental effect on gait. To enhance mechanical properties of AFOs we developed an innovative, custom-made, carbon, ankle-foot orthosis (Ca.M.O) which offers the opportunity to tune its response to the patient's gait characteristics and/or functional maturity. OBJECTIVE: To assess the efficacy of Ca.M.O. in improving gait in a group of hemiplegic CP children and to compare its performances with those of commonly prescribed AFO...
February 10, 2017: NeuroRehabilitation
https://www.readbyqxmd.com/read/28220914/the-association-between-body-built-and-injury-occurrence-in-pre-professional-ballet-dancers-separated-analysis-for-the-injured-body-locations
#14
Petra Zaletel, Damir Sekulić, Nataša Zenić, Michael R Esco, Dorica Šajber, Miran Kondrič
OBJECTIVES: This study has aimed at identifying prevalence of injury-occurrence in 24 pre-professional-ballet-dancers (females, 16-18 years of age), and identifying the associations between the body-built and prevalence of injuries. MATERIAL AND METHODS: The sample of variables included: body mass, body height, and 3 somatotype characteristics (mesomorph, ectomorph and endomorph) and data on injuries over the preceding year. RESULTS: Dancers were mostly ectomorphic-mesomorph (endomorphy: 2...
February 21, 2017: International Journal of Occupational Medicine and Environmental Health
https://www.readbyqxmd.com/read/28220573/a-comparison-of-two-types-of-ankle-supports-in-men-with-haemophilia-and-unilateral-ankle-pain-from-arthropathy
#15
D Oleson, L Fox, T Nguyen, P Sochacki, M McCarthy, E Adams, M Recht
INTRODUCTION: Adults with haemophilia frequently have a painful and disordered gait due to ankle arthropathy. AIM: The aim of this study was to determine if pain and gait parameters were affected by the use of different types of ankle bracing. METHODS: We investigated the gait patterns of 17 men with severe haemophilia without bracing, using a fracture boot (FB) and a carbon fibre floor reaction ankle foot orthosis (CF-AFO). Pain relief was determined in each condition...
February 20, 2017: Haemophilia: the Official Journal of the World Federation of Hemophilia
https://www.readbyqxmd.com/read/28220401/numerical-model-for-healthy-and-injured-ankle-ligaments
#16
Antonella Forestiero, Emanuele Luigi Carniel, Chiara Giulia Fontanella, Arturo Nicola Natali
The aim of this work is to provide a computational tool for the investigation of ankle mechanics under different loading conditions. The attention is focused on the biomechanical role of ankle ligaments that are fundamental for joints stability. A finite element model of the human foot is developed starting from Computed Tomography and Magnetic Resonance Imaging, using particular attention to the definition of ankle ligaments. A refined fiber-reinforced visco-hyperelastic constitutive model is assumed to characterize the mechanical response of ligaments...
February 20, 2017: Australasian Physical & Engineering Sciences in Medicine
https://www.readbyqxmd.com/read/28220261/does-a-foot-drop-implant-improve-kinetic-and-kinematic-parameters-in-the-foot-and-ankle
#17
Kiriakos Daniilidis, Eike Jakubowitz, Anna Thomann, Sarah Ettinger, Christina Stukenborg-Colsman, Daiwei Yao
INTRODUCTION: Unlike the drop foot therapy with ortheses, the therapeutic effect of an implantable peroneus nerve stimulator (iPNS) is not well described. IPNS is a dynamic therapy option which is placed directly to the motoric part of the peroneal nerve and evokes a dorsiflexion of the paralysed foot. This retrospective study evaluates the kinematics and kinetics in drop foot patients who were treated with an iPNS. MATERIALS AND METHODS: 18 subjects (mean age 51...
February 20, 2017: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/28219308/perceived-risk-factors-for-nonunion-following-foot-and-ankle-arthrodesis
#18
Gowreeson Thevendran, Kalpesh Shah, Stephen J Pinney, Alastair Se Younger
BACKGROUND: A major complication of foot and ankle arthrodesis is nonunion, which occurs in approximately 12% of cases. Various factors influence a patient's risk for nonunion following foot and ankle arthrodesis. We surveyed international foot and ankle surgeons to determine (1) risk factors perceived most important for nonunion, (2) factors considered absolute contraindications for arthrodesis, and (3) differences among expert groups regarding perceived risk factors and their stratification...
January 2017: Journal of Orthopaedic Surgery
https://www.readbyqxmd.com/read/28219141/-significance-of-bacteria-detection-with-filter-paper-method-on-diagnosis-of-diabetic-foot-wound-infection
#19
X H Zou, Y P Zhu, G Q Ren, G C Li, J Zhang, L J Zou, Z B Feng, B H Li
Objective: To evaluate the significance of bacteria detection with filter paper method on diagnosis of diabetic foot wound infection. Methods: Eighteen patients with diabetic foot ulcer conforming to the study criteria were hospitalized in Liyuan Hospital Affiliated to Tongji Medical College of Huazhong University of Science and Technology from July 2014 to July 2015. Diabetic foot ulcer wounds were classified according to the University of Texas diabetic foot classification (hereinafter referred to as Texas grade) system, and general condition of patients with wounds in different Texas grade was compared...
February 20, 2017: Zhonghua Shao Shang za Zhi, Zhonghua Shaoshang Zazhi, Chinese Journal of Burns
https://www.readbyqxmd.com/read/28217424/joint-mobilization-in-the-management-of-persistent-insertional-achilles-tendinopathy-a-case-report
#20
Dhinu J Jayaseelan, Andrew A Post, John J Mischke, Josiah D Sault
BACKGROUND & PURPOSE: Insertional Achilles tendinopathy (IAT) can be a challenging condition to manage conservatively. Eccentric exercise is commonly used in the management of chronic tendinopathy; however, it may not be as helpful for insertional tendon problems as compared to mid-portion dysfunction. While current evidence describing the physical therapy management of IAT is developing, gaps still exist in descriptions of best practice. The purpose of this case report is to describe the management of a patient with persistent IAT utilizing impairment-based joint mobilization, self-mobilization, and exercise...
February 2017: International Journal of Sports Physical Therapy
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