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Ankle stability

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https://www.readbyqxmd.com/read/28814046/adaptive-control-of-an-actuated-ankle-foot-orthosis
#1
Victor Arnez-Paniagua, Hala Rifai, Yacine Amirat, Samer Mohammed
This paper deals with the control of an active ankle foot orthosis (AAFO) to assist the gait of paretic patients. The AAFO system is driven by both, the residual human torque delivered by the muscles spanning the ankle joint and the AAFO's actuator's torque. A projection-based model reference adaptive control is proposed to assist dorsiflexion and plantar-flexion of the ankle joint during daily living walking activities. Unlike most classical model-based controllers, the proposed one does not require any prior estimation of the system's (foot-AAFO) parameters...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813971/feasibility-study-of-transtibial-amputee-walking-using-a-powered-prosthetic-foot
#2
Martin Grimmer, Matthew Holgate, Jeffrey Ward, Alexander Boehler, Andre Seyfarth
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 achieve non-amputee ankle biomechanics during walking with the powered prosthetic foot, Walk-Run Ankle. Trajectories were calculated using the desired ankle angle and ankle moment based spring deflection at a given spring stiffness...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813828/active-lower-limb-orthosis-with-one-degree-of-freedom-for-people-with-paraplegia
#3
Michal Gloger, Goro Obinata, Eiichi Genda, Jan Babjak, Yanling Pei
The main challenges of designing devices for paraplegic walking can be summarized into three groups, stability and comfort, high efficiency or low energy consumption, dimensions and weight. A new economical device for people with paraplegia which tackles all problems of the three groups is introduced in this paper. The main idea of this device is based on HALO mechanism. HALO is compact passive medial hip joint orthosis with contralateral hip and ankle linkage, which keeps the feet always parallel to the ground and assists swinging the leg...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28800713/application-of-high-speed-dual-fluoroscopy-to-study-in-vivo-tibiotalar-and-subtalar-kinematics-in-patients-with-chronic-ankle-instability-and-asymptomatic-control-subjects-during-dynamic-activities
#4
Koren E Roach, K Bo Foreman, Alexej Barg, Charles L Saltzman, Andrew E Anderson
BACKGROUND: Abnormal angular and translational (ie, kinematic) motion at the tibiotalar and subtalar joints is believed to cause osteoarthritis in patients with chronic ankle instability (CAI). METHODS: In this preliminary study the investigators quantified and compared in vivo tibiotalar and subtalar kinematics in 4 patients with CAI (3 women) and 10 control subjects (5 men) using dual fluoroscopy during a balanced, single-leg heel-rise and treadmill walking at 0...
August 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28800708/multiplanar-correction-of-the-lesser-digital-deviation-and-indirect-plantar-plate-rupture-repair-using-a-braided-polyethylene-nylon-suture-a-technique-guide
#5
Cody D Blazek, Roberto A Brandão, Jeffrey M Manway, Patrick R Burns
Forefoot and lesser digital pathology continues to be a challenging area of surgical correction for foot and ankle surgeons. Many techniques for the correction of digital deformities secondary to plantar plate rupture, regardless of planal dominance, have been described including direct repair and metatarsal shortening osteotomies for repair. The authors present a new technique for multiplanar correction of deformed lesser digits without direct repair of the plantar plate rupture utilizing a specialty suture...
August 1, 2017: Foot & Ankle Specialist
https://www.readbyqxmd.com/read/28782096/the-prevention-of-musculoskeletal-injuries-in-volleyball-the-systematic-development-of-an-intervention-and-its-feasibility
#6
Vincent Gouttebarge, Marije van Sluis, Evert Verhagen, Johannes Zwerver
BACKGROUND: A scientific research project has started in the Netherlands with the aim of developing and implementing an evidence-based intervention to prevent the occurrence of musculoskeletal injuries among young and adult recreational volleyball players. This article describes (i) the systematic development of the intervention; and (ii) the assessment of its feasibility in terms of relevancy, suitability and usability. SYSTEMATIC DEVELOPMENT OF THE INTERVENTION: The development of the intervention was based on the Intervention Mapping structured and systematic process...
December 2017: Injury Epidemiology
https://www.readbyqxmd.com/read/28777127/antivertiginous-drug-therapy-does-not-hinder-the-efficacy-of-individualized-vibrotactile-neurofeedback-training-for-vestibular-rehabilitation-a-randomized-trial
#7
Dietmar Basta, Liliana Borsellino, Arne Ernst
Vestibular rehabilitation using individualized vibrotactile neurofeedback training (IVNT) can lead to significant improvement in the postural stability of patients with vestibular symptoms of different origins. However, some of these patients have complex, severe dizziness, meaning that a pharmacological pretreatment or parallel (to vestibular rehabilitation) treatment can help them perform the rehabilitation exercises. Hence, the present study investigated the influence of a pharmacological treatment on the efficacy of vibrotactile neurofeedback training in patients with chronic, noncompensated vestibulopathies...
August 2, 2017: International Journal of Rehabilitation Research. Revue Internationale de Recherches de Réadaptation
https://www.readbyqxmd.com/read/28765981/-anatomic-stabilization-of-chronic-lateral-instability-of-the-ankle-gold-technique
#8
REVIEW
T Diermeier, B Scheiderer, L Lacheta, A B Imhoff
OBJECTIVES: Anatomical reconstruction of the lateral ligament complex in the ankle. INDICATIONS: Chronic lateral ankle instability. CONTRAINDICATIONS: Severe osteoarthritis, obesity, hindfoot varus, general contraindications (infection, circulatory disorders, diabetic foot syndrome). SURGICAL TECHNIQUE: Anatomical V‑shaped reconstruction of the lateral ligament complex with half of the peroneus brevis tendon and additional retinaculum stabilization...
August 1, 2017: Operative Orthopädie und Traumatologie
https://www.readbyqxmd.com/read/28764814/differences-of-muscle-co-contraction-of-the-ankle-joint-between-young-and-elderly-adults-during-dynamic-postural-control-at-different-speeds
#9
Yoshitaka Iwamoto, Makoto Takahashi, Koichi Shinkoda
BACKGROUND: Agonist and antagonist muscle co-contractions during motor tasks are greater in the elderly than in young adults. During normal walking, muscle co-contraction increases with gait speed in young adults, but not in elderly adults. However, no study has compared the effects of speed on muscle co-contraction of the ankle joint during dynamic postural control in young and elderly adults. We compared muscle co-contractions of the ankle joint between young and elderly subjects during a functional stability boundary test at different speeds...
August 2, 2017: Journal of Physiological Anthropology
https://www.readbyqxmd.com/read/28751531/the-preventive-effect-of-a-soccer-specific-ankle-brace-on-acute-lateral-ankle-sprains-in-girls-amateur-soccer-players-study-protocol-of-a-cluster-randomised-controlled-trial
#10
Karin Thijs, Bionka Huisstede, Edwin Goedhart, Frank Backx
BACKGROUND: Acute lateral ankle sprains are the single most often diagnosed injury in female soccer players and often result in an inability to play. This highlights the need for effective prevention strategies. Proprioceptive training and/or the use of an external support to decrease inversion of the ankle joint can prevent or reduce the number of acute lateral ankle sprains. The effectiveness of a soccer-specific ankle brace in reducing first-time and recurrent acute lateral ankle sprains has never been investigated in girl soccer players...
July 27, 2017: Injury Prevention: Journal of the International Society for Child and Adolescent Injury Prevention
https://www.readbyqxmd.com/read/28751170/rehabilitation-of-distal-radioulnar-joint-instability
#11
G Mesplié, V Grelet, O Léger, S Lemoine, D Ricarrère, C Geoffroy
Distal radioulnar joint (DRUJ) instabilities are common and often combined with other injuries of the interosseous membrane and/or the proximal radioulnar joint. Once they are diagnosed and the treatment is chosen, physiotherapists have limited choices due to the lack of validated protocols. The benefits of proprioception and neuromuscular rehabilitation have been brought to light for the shoulder, knee and ankle joints, among others. However, no program has been described for the DRUJ. The purpose of this article is to study the muscular elements responsible for active DRUJ stability, and to propose a proprioceptive rehabilitation program suited to this condition...
July 24, 2017: Hand Surgery and Rehabilitation
https://www.readbyqxmd.com/read/28747337/comparisons-of-external-fixator-combined-with-limited-internal-fixation-and-open-reduction-and-internal-fixation-for-sanders-type-2-calcaneal-fractures-finite-element-analysis-and-clinical-outcome
#12
M Pan, L Chai, F Xue, L Ding, G Tang, B Lv
OBJECTIVES: The aim of this study was to compare the biomechanical stability and clinical outcome of external fixator combined with limited internal fixation (EFLIF) and open reduction and internal fixation (ORIF) in treating Sanders type 2 calcaneal fractures. METHODS: Two types of fixation systems were selected for finite element analysis and a dual cohort study. Two fixation systems were simulated to fix the fracture in a finite element model. The relative displacement and stress distribution were analysed and compared...
July 2017: Bone & Joint Research
https://www.readbyqxmd.com/read/28745068/arthroscopic-capsular-shrinkage-for-treatment-of-chronic-lateral-ankle-instability
#13
Gwendolyn Vuurberg, Jasper S de Vries, Rover Krips, Leendert Blankevoort, Alex W F M Fievez, C Niek van Dijk
BACKGROUND: Capsular shrinkage is an arthroscopic stabilization technique that can be used in patients with chronic ankle instability (CAI), if desired in addition to primary arthroscopic procedures. Despite positive short-term results, long-term follow-up of these patients has not yet been performed. Therefore, our objective was to assess whether capsular shrinkage still provided functional outcome after 12-14 years compared to preoperative scores. METHODS: This study was a retrospective long-term follow-up of a prospectively conducted longitudinal multicenter trial...
July 1, 2017: Foot & Ankle International
https://www.readbyqxmd.com/read/28742210/clinical-research-on-correction-of-ankle-arthritis-related-factor-levels-via-urea
#14
C Sun, S Zhang, L Wei, J-Z Zhang
OBJECTIVE: To investigate the reliability of urea as the internal reference of ankle irrigating fluid in correction of synovial fluid and related factor concentration dilution times, and to further determine the factor expression level in synovial fluid. PATIENTS AND METHODS: A total of 91 patients, including 20 cases of non-posterior median foot lesions and 71 cases of unilateral ankle osteoarthritis, were enrolled in this study. AOFAS score, Takakura staging and visual analogue pain scale were given; the venous blood was collected and the ankle fluid and irrigating fluid were obtained from the affected side via puncture...
July 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28736791/control-of-standing-balance-at-leaning-postures-with-functional-neuromuscular-stimulation-following-spinal-cord-injury
#15
Musa L Audu, Brooke M Odle, Ronald J Triolo
This study systematically explored the potential of applying feedback control of functional neuromuscular stimulation (FNS) for stabilizing various erect and leaning standing postures after spinal cord injury (SCI). Perturbations ranging from 2 to 6% body weight were applied to two subjects with motor complete thoracic level SCI who were proficient at standing with implanted multichannel neural stimulators to activate the ankle, knee, hip and trunk muscles. The subjects stood with four different postures: erect, forward, forward-right and forward-left...
July 24, 2017: Medical & Biological Engineering & Computing
https://www.readbyqxmd.com/read/28736326/tone-inhibiting-insoles-enhance-the-reciprocal-inhibition-of-ankle-plantarflexors-of-post-stroke-hemiparetic-subjects-an-electromyographic-study
#16
Nobushige Takahashi, Hidetoshi Takahashi, Osamu Takahashi, Ryosuke Ushijima, Rie Umebayashi, Junji Nishikawa, Yasutomo Okajima
BACKGROUND: Spasticity is a common sequela of upper motor neuron pathology, such as cerebrovascular diseases and cerebral palsy. Intervention for spasticity of the ankle plantarflexors in physical therapy may include tone-inhibiting casting and/or orthoses for the ankle and foot. However, the physiological mechanism of tone reduction by such orthoses remains unclarified. OBJECTIVE: To investigate the electrophysiologic effects of tone-inhibiting insoles in stroke subjects with hemiparesis by measuring changes in reciprocal Ia inhibition (RI) in the ankle plantarflexor...
July 20, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28723758/total-knee-arthroplasty-conversion-after-a-failed-lateral-closing-wedge-high-tibial-osteotomy-with-knee-hyperextension-and-secondary-ankle-degeneration-a-case-report
#17
Chen Yao, Xingquan Xu, Sheng Zhou, Xiaoxiao Song, Dongquan Shi, Qing Jiang
RATIONALE: High tibial osteotomy (HTO) has been used widely for medial compartment knee osteoarthritis to correct the deformity and relieve symptoms, especially in young patients who are willing to maintain the high activity level. However, the change of bone morphology, ligament imbalance, limb malalignment, and other complications may influence the short-term outcomes of HTO. Some cases may even require conversion to TKA shortly after HTO because of the loss of correction or pain due to accelerated osteoarthritis...
July 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28717619/comparison-of-dynamic-postural-stability-scores-between-athletes-with-and-without-chronic-ankle-instability-during-lateral-jump-landing
#18
Zeinab Shiravi, Azadeh Shadmehr, Saeed Talebian Moghadam, Behrouz Attarbashi Moghadam
BACKGROUNDS: Many ankle injuries occur while participating in sports that require jumping and landing such as basketball, volleyball and soccer. Most recent studies have investigated dynamic postural stability of patients with chronic ankle instability after landing from a forward jump. The present study aimed to investigate the dynamic postural stability of the athletes who suffer from chronic ankle sprain while landing from a lateral jump. METHODS: Twelve athletes with self-reported unilateral chronic ankle instability (4 females and 8 males) and 12 matched controls (3 females and 9 males) voluntarily participated in the study...
January 2017: Muscles, Ligaments and Tendons Journal
https://www.readbyqxmd.com/read/28710794/ultrasound-assessment-of-the-sural-nerve-in-patients-with-neuropathic-pain-after-ankle-surgery
#19
Nadia Rbia, Tim H J Nijhuis, Gert R Roukema, Ruud W Selles, Cornelis H van der Vlies, Steven E R Hovius
INTRODUCTION: The sural nerve may be damaged after ankle injury. The aim of our study was to determine the diagnostic utility of high-resolution sonography in patients with ankle fractures treated by open reduction and internal fixation in whom there was a clinical suspicion of sural neuropathy. METHODS: We examined the ultrasound (US) characteristics of patients with and without postsurgical sural neuropathic pain and healthy volunteers. Cross-sectional area (CSA), echogenicity, and vascularization of the sural nerves were recorded...
July 15, 2017: Muscle & Nerve
https://www.readbyqxmd.com/read/28710509/x-shaped-inferior-extensor-retinaculum-and-its-doubtful-use-in-the-br%C3%A3-strom-gould-procedure
#20
M Dalmau-Pastor, F Malagelada, G M M J Kerkhoffs, M C Manzanares, J Vega
PURPOSE: The inferior extensor retinaculum (IER) is an aponeurotic structure located in the anterior aspect of the ankle. According to the literature, it can be used to reinforce a repair of the anterior talofibular ligament in ankle instability. Despite its usual description as an Y-shaped structure, it is still unclear which part of the retinaculum is used for this purpose, or if it is instead the crural fascia that is being used. The purpose of this study is to define the anatomical characteristics of the IER to better understand its role in the Broström-Gould procedure...
July 14, 2017: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
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