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https://www.readbyqxmd.com/read/28427290/a-real-time-method-for-decoding-the-neural-drive-to-muscles-using-single-channel-intra-muscular-emg-recordings
#1
Saeed Karimimehr, Hamid Reza Marateb, Silvia Muceli, Marjan Mansourian, Miguel Angel Mañanas, Dario Farina
The neural command from motor neurons to muscles - sometimes referred to as the neural drive to muscle - can be identified by decomposition of electromyographic (EMG) signals. This approach can be used for inferring the voluntary commands in neural interfaces in patients with limb amputations. This paper proposes for the first time an innovative method for fully automatic and real-time intramuscular EMG (iEMG) decomposition. The method is based on online single-pass density-based clustering and adaptive classification of bivariate features, using the concept of potential measure...
March 20, 2017: International Journal of Neural Systems
https://www.readbyqxmd.com/read/28422686/an-integrated-movement-analysis-framework-to-study-upper-limb-function-a-pilot-study
#2
Kimberly Kontson, Ian Marcus, Barbara Myklebust, Eugene Civillico
The functional capabilities of individuals with upper limb disabilities are assessed throughout rehabilitation and treatment regimens using functional outcome measures. For the upper limb amputee population, there are none which quantitatively take into account the quality of movement while an individual is performing tasks. In this work, we demonstrate the use of an integrated movement analysis framework, based on motion capture and ground reaction force data, to capture quantitative information about how subjects complete a commonly used functional outcome measure, the Box and Blocks Test (BBT)...
April 12, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28422662/use-of-accelerometers-in-the-control-of-practical-prosthetic-arms
#3
Peter Kyberd, Adrian Poulton
Accelerometers can be used to augment the control of powered prosthetic arms. They can detect the orientation of the joint and limb and the controller can correct for the amount of torque required to move the limb. They can also be used to create a platform, with a fixed orientation relative to gravity for the object held in the hand. This paper describes three applications for this technology, in a powered wrist and powered arm. By adding sensors to the arm making these data available to the controller, the input from the user can be made simpler...
April 12, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28420135/a-prosthetic-hand-body-area-controller-based-on-efficient-pattern-recognition-control-strategies
#4
Simone Benatti, Bojan Milosevic, Elisabetta Farella, Emanuele Gruppioni, Luca Benini
Poliarticulated prosthetic hands represent a powerful tool to restore functionality and improve quality of life for upper limb amputees. Such devices offer, on the same wearable node, sensing and actuation capabilities, which are not equally supported by natural interaction and control strategies. The control in state-of-the-art solutions is still performed mainly through complex encoding of gestures in bursts of contractions of the residual forearm muscles, resulting in a non-intuitive Human-Machine Interface (HMI)...
April 15, 2017: Sensors
https://www.readbyqxmd.com/read/28405377/modulation-of-leg-joint-function-to-produce-emulated-acceleration-during-walking-and-running-in-humans
#5
Dominic James Farris, Brent J Raiteri
Understanding how humans adapt gait mechanics for a wide variety of locomotor tasks is important for inspiring the design of robotic, prosthetic and wearable assistive devices. We aimed to elicit the mechanical adjustments made to leg joint functions that are required to generate accelerative walking and running, using metrics with direct relevance to device design. Twelve healthy male participants completed constant speed (CS) walking and running and emulated acceleration (ACC) trials on an instrumented treadmill...
March 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28399873/influence-of-functional-task-oriented-mental-practice-on-the-gait-of-transtibial-amputees-a-randomized-clinical-trial
#6
Rodrigo Gontijo Cunha, Paulo José Guimarães Da-Silva, Clarissa Cardoso Dos Santos Couto Paz, Ana Carolina da Silva Ferreira, Carlos Julio Tierra-Criollo
BACKGROUND: Mental practice (MP) through motor imagery is a cognitive training strategy used to improve locomotor skills during rehabilitation programs. Recent works have used MP tasks to investigate the neurophysiology of human gait; however, its effect on functional performance has not been evaluated. In the present study, the influence of gait-oriented MP tasks on the rehabilitation process of gait in transtibial amputees was investigated by assessing the vertical (V), anterior-posterior (AP), and medio-lateral (ML) ground reaction forces (GRFs) and the time duration of the support phase of the prosthetic limb...
April 11, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/28395001/the-impact-of-simultaneously-applying-normal-stress-and-vibrotactile-stimulation-for-feedback-of-exteroceptive-information
#7
M Reza Motamedi, Martin Otis, Vincent Duchaine
Commercially available prosthetic hands do not convey any tactile information, forcing amputees to rely solely on visual attention. A promising solution to this problem is haptics, which could lead to new prostheses in which tactile information is conveyed between the amputee and the artificial limb. This paper investigates how the simultaneous application of two different types of haptic feedback - vibration and normal stress - impacts the human sensory perception of each separate feedback type. These stimuli were applied to glabrous skin on the forearms of 14 participants...
April 10, 2017: Journal of Biomechanical Engineering
https://www.readbyqxmd.com/read/28389759/risk-factors-for-amputation-in-periprosthetic-knee-infection
#8
Alan Giovanni Polanco-Armenta, Adrián Miguel-Pérez, Adrián Huetzemani Rivera-Villa, Manuel Ignacio Barrera-García, María Guadalupe Sánchez-Prado, Alberto Vázquez-Noya, Fernando Vidal-Cervantes, José de Jesús Guerra-Jasso, José Manuel Pérez-Atanasio
Treatment for prosthetic knee replacement is becoming more common. Infection is an arthroplasty-related complication leading to prolonged hospitalization, multiple surgical procedures, permanent loss of the implant, impaired function, impaired quality of life and even amputation of the limb. Previous studies have evaluated the risk factors associated with periprosthetic knee infection, but scarce information related to risk factors associated with amputation in this group of patients is available. The purpose of this study was to identify risk factors for amputation in periprosthetic infected knee through a case-control study, analyzing patients treated from January 2012 to November 2016 in a hospital with a high incidence of this diagnosis...
April 7, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28377115/this-is-your-new-normal-a-qualitative-study-of-barriers-and-facilitators-to-physical-activity-in-veterans-with-lower-extremity-loss
#9
Alyson J Littman, Erin D Bouldin, Jodie K Haselkorn
BACKGROUND: Regular physical activity (PA) is essential for aging well with a disability, preventing the onset or worsening of chronic conditions, functional loss, and maintaining or improving quality of life, yet PA levels are low in those with disabilities, including those with a lower extremity amputation (LEA). OBJECTIVE: To determine methods for promoting PA in this population, our objective was to better understand the barriers and facilitators to PA that persons with LEA face...
March 22, 2017: Disability and Health Journal
https://www.readbyqxmd.com/read/28366038/perceived-self-efficacy-and-specific-self-reported-outcomes-in-persons-with-lower-limb-amputation-using-a-non-microprocessor-controlled-versus-a-microprocessor-controlled-prosthetic-knee
#10
Saffran Möller, Kerstin Hagberg, Kersti Samulesson, Nerrolyn Ramstrand
PURPOSE: To measure self-efficacy in a group of individuals who have undergone a lower-limb amputation and investigate the relationship between self-efficacy and prosthetic-specific outcomes including prosthetic use, mobility, amputation-related problems and global health. A second purpose was to examine if differences exist in outcomes based upon the type of prosthetic knee unit being used. METHOD: Cross-sectional study using the General Self-Efficacy (GSE) Scale and the Questionnaire for Persons with a Transfemoral Amputation (Q-TFA)...
April 1, 2017: Disability and Rehabilitation. Assistive Technology
https://www.readbyqxmd.com/read/28360121/prosthetic-model-but-not-stiffness-or-height-affects-the-metabolic-cost-of-running-for-athletes-with-unilateral-transtibial-amputations
#11
Owen N Beck, Paolo Taboga, Alena Marie Grabowski
Running-specific prostheses enable athletes with lower limb amputations to run by emulating the spring-like function of biological legs. Current prosthetic stiffness and height recommendations aim to mitigate kinematic asymmetries for athletes with unilateral transtibial amputations. However, it's unclear how different prosthetic configurations influence the biomechanics and metabolic costs of running. Consequently, we investigated how prosthetic model, stiffness, and height affect the biomechanics and metabolic costs of running...
March 30, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28359320/novel-intramedullary-device-for-lengthening-transfemoral-residual-limbs
#12
Todd A Kuiken, Bennet A Butler, Tom Sharkey, Andre D Ivy, Daniel Li, Terrance D Peabody
BACKGROUND: Lower limb loss is a highly disabling medical condition that can severely impact a person's quality of life. Recovery becomes especially challenging if an amputee has a short residual limb, which can complicate proper prosthetic fitting, causing discomfort, difficulties in suspension, and reduced mobility. Current limb lengthening techniques such as the Ilizarov apparatus and external fixators are cumbersome, uncomfortable, and have high complication rates. In this study, we investigated the effectiveness of a novel limb-lengthening device that uses intramedullary bone lengthening and requires only one percutaneous rod at the end of the limb during the distraction phase...
March 31, 2017: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/28352601/systematic-review-and-comparative-meta-analysis-of-outcomes-following-pedicled-muscle-versus-fasciocutaneous-flap-coverage-for-complex-periprosthetic-wounds-in-patients-with-total-knee-arthroplasty
#13
James M Economides, Michael V DeFazio, Kayvon Golshani, Mark Cinque, Ersilia L Anghel, Christopher E Attinger, Karen Kim Evans
BACKGROUND: In cases of total knee arthroplasty (TKA) threatened by potential hardware exposure, flap-based reconstruction is indicated to provide durable coverage. Historically, muscle flaps were favored as they provide vascular tissue to an infected wound bed. However, data comparing the performance of muscle versus fasciocutaneous flaps are limited and reflect a lack of consensus regarding the optimal management of these wounds. The aim of this study was to compare the outcomes of muscle versus fasciocutaneous flaps following the salvage of compromised TKA...
March 2017: Archives of Plastic Surgery
https://www.readbyqxmd.com/read/28351207/the-effect-of-cognitive-impairment-on-prosthesis-use-in-older-adults-who-underwent-amputation-due-to-vascular-related-etiology-a-systematic-review-of-the-literature
#14
Daniel Joseph Lee, Matthew C Costello
BACKGROUND: Older adults with amputations secondary to vascular etiologies may additionally present with cognitive impairment. Cognition plays an important role in the adoption of a prosthetic limb, although the degree and type of impact are debated. Previous literature reviews have not been directed at the specific population of older adults who underwent vascular-related lower limb amputation. OBJECTIVES: First, to assess extant literature for relationships between cognitive function and prosthesis-related outcomes in older adults who underwent lower limb amputation for vascular-related etiologies...
March 1, 2017: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28349945/touch-and-hearing-mediate-osseoperception
#15
Francesco Clemente, Bo Håkansson, Christian Cipriani, Johan Wessberg, Katarzyna Kulbacka-Ortiz, Rickard Brånemark, Karl-Johan Fredén Jansson, Max Ortiz-Catalan
Osseoperception is the sensation arising from the mechanical stimulation of a bone-anchored prosthesis. Here we show that not only touch, but also hearing is involved in this phenomenon. Using mechanical vibrations ranging from 0.1 to 6 kHz, we performed four psychophysical measures (perception threshold, sensation discrimination, frequency discrimination and reaction time) on 12 upper and lower limb amputees and found that subjects: consistently reported perceiving a sound when the stimulus was delivered at frequencies equal to or above 400 Hz; were able to discriminate frequency differences between stimuli delivered at high stimulation frequencies (~1500 Hz); improved their reaction time for bimodal stimuli (i...
March 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28341505/secondary-aortoenteric-erosion-followed-by-recurrent-lower-extremity-abscesses
#16
Shigeshi Ono, Yoshitomo Samejima, Susumu Watada, Toshihiro Kakefuda
A secondary aortoenteric fistula (SAEF) is a relatively rare complication of aortoiliac reconstructive surgery, often involving relatively fixed duodenal 3(rd) portion and a vascular anastomosis. We observed a 52-year-old man with a recurrent right lower leg abscess following the erosion between ipsilateral bifurcated prosthetic graft limb and non-fixed jejunum. In situ graft-sparing surgical treatment with aggressive debridement was successfully performed. A SAEF may occur even at a non-vascular anastomosis site, or in non-fixed small bowel, and may become a source of a septic embolus...
March 22, 2017: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/28341191/-bacillus-cereus-endocarditis-and-a-probable-cutaneous-gateway
#17
S Soudet, C Becquart, F Dezoteux, K Faure, D Staumont-Salle, E Delaporte
BACKGROUND: Bacillus cereus is a ubiquitous telluric organism. B. cereus endocarditis is a rare condition seen mostly in prosthetic heart valves and among intravenous drug users. We report a new case of a patient without risk factors and with a good clinical outcome not requiring valve replacement. CASE REPORT: In October 2014, a 50-year-old woman was referred to the dermatology department of Lille University Hospital for lower-limb wounds developing 6 months earlier...
January 2017: Annales de Dermatologie et de Vénéréologie
https://www.readbyqxmd.com/read/28336738/single-stage-osseointegrated-reconstruction-and-rehabilitation-of-lower-limb-amputees-the-osseointegration-group-of-australia-accelerated-protocol-2-ogaap-2-for-a-prospective-cohort-study
#18
Munjed Al Muderis, William Lu, Kevin Tetsworth, Belinda Bosley, Jiao Jiao Li
INTRODUCTION: Lower limb amputations have detrimental influences on the quality of life, function and body image of the affected patients. Following amputation, prolonged rehabilitation is required for patients to be fitted with traditional socket prostheses, and many patients experience symptomatic socket-residuum interface problems which lead to reduced prosthetic use and quality of life. Osseointegration has recently emerged as a novel approach for the reconstruction of amputated limbs, which overcomes many of the socket-related problems by directly attaching the prosthesis to the skeletal residuum...
March 22, 2017: BMJ Open
https://www.readbyqxmd.com/read/28324949/muscle-synergy-analysis-in-transtibial-amputee-during-ramp-ascending-activity
#19
P Mehryar, M S Shourijeh, H F Maqbool, M Torabi, A A Dehghani-Sanij
In developed countries, the highest number of amputees are elderly with transtibial amputation. Walking on inclined surfaces is difficult for amputees due to loss of muscle volume and strength thereby transtibial amputees (TA) rely on the intact limb to maintain stability. The aim of this study was to use the concatenated non-negative matrix factorization (CNMF) technique to calculate muscle synergy components and compare the difference in muscle synergies and their associated activation profiles in the healthy and amputee groups during ramp ascending (RA) activity...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28323804/transtibial-amputation-outcomes-study-taos-comparing-transtibial-amputation-with-and-without-a-tibiofibular-synostosis-ertl-procedure
#20
Michael J Bosse, Saam Morshed, Lisa Reider, William Ertl, James Toledano, Reeza Firoozabadi, Rachel B Seymour, Eben Carroll, Daniel O Scharfstein, Barbara Steverson, Ellen J MacKenzie
The optimal technique for a transtibial amputation in a young, active, and healthy patient is controversial. Proponents of the Ertl procedure (in which the cut ends of the tibia and fibula are joined with a bone bridge synostosis) argue that the residual limb is more stable which confers better prosthetic fit and improved function especially among high-performing individuals. At the same time, the Ertl procedure is associated with longer operative and healing time and may be associated with a higher complication rate compared with the standard Burgess procedure...
April 2017: Journal of Orthopaedic Trauma
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