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https://www.readbyqxmd.com/read/29779455/function-quality-of-life-and-community-integration-of-deka-arm-users-after-discharge-from-prosthetic-training-impact-of-home-use-experience
#1
Linda Resnik, Frantzy Acluche, Matthew Borgia, Jill Cancio, Gail Latlief, Nicole Sasson
BACKGROUND: Research on adaptation to advanced upper limb prostheses is needed. OBJECTIVES: To (1) examine change in function, quality of life and community integration after prosthetic training, (2) determine whether change in outcomes varied by prosthesis complexity, and (3) compare patterns of change at 1 month for those who withdrew from the study and those who did not. STUDY DESIGN: Quasi-experimental time series. METHODS: Data were analyzed for 22 participants (18 completers)...
May 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29756458/evaluation-of-the-effects-of-adding-vibrotactile-feedback-to-myoelectric-prosthesis-users-on-performance-and-visual-attention-in-a-dual-task-paradigm
#2
Eitan Raveh, Jason Friedman, Sigal Portnoy
OBJECTIVE: To evaluate the effects of adding vibrotactile feedback to myoelectric prosthesis users on the performance time and visual attention in a dual-task paradigm. DESIGN: A repeated-measures design with a counterbalanced order of two conditions. SETTING: Laboratory setting. SUBJECTS: Transradial amputees using a myoelectric prosthesis with normal or corrected eyesight ( N = 12, median age = 65 ± 13 years)...
May 1, 2018: Clinical Rehabilitation
https://www.readbyqxmd.com/read/29755399/leg-prosthesis-with-somatosensory-feedback-reduces-phantom-limb-pain-and-increases-functionality
#3
Caroline Dietrich, Sandra Nehrdich, Sandra Seifert, Kathrin R Blume, Wolfgang H R Miltner, Gunther O Hofmann, Thomas Weiss
Phantom limb pain (PLP) develops in most patients with lower limb amputation. Changes in the peripheral and central nervous system (CNS) are hypothesized to contribute to PLP. Based on ideas to modify neural reorganization within the CNS, the aim of the study was to test, whether prostheses with somatosensory feedback might help to reduce PLP, and increase the functionality of movement with a prosthesis. We therefore equipped the prostheses of 14 lower leg amputees with a simple to use feedback system that provides electrocutaneous feedback to patients' thigh whenever the foot and toes of the prosthesis touch the ground...
2018: Frontiers in Neurology
https://www.readbyqxmd.com/read/29752241/upper-limb-prosthesis-control-for-high-level-amputees-via-myoelectric-recognition-of-leg-gestures
#4
Kenneth R Lyons, Sanjay S Joshi
Recognition of motion intent via surface electromyography (EMG) has become increasingly practical for prosthesis control, but lacking residual muscle sites remains a major obstacle to its use by high-level amputees. Currently, there are few approaches to upper limb prosthesis control for individuals with amputations proximal to the elbow, all of which suffer from one or more of three primary problems: invasiveness, the need for intensive training, and lacking functionality. Using surface EMG sensors placed on the lower leg and a natural mapping between degrees of freedom of the leg and the arm, we tested a noninvasive control approach by which high-level amputees could control prosthetic elbow, wrist, and hand movements with minimal training...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29752234/a-stair-ascent-and-descent-controller-for-a-powered-ankle-prosthesis
#5
Steven Culver, Harrison Bartlett, Amanda Shultz, Michael Goldfarb
This paper presents a control system for a powered transtibial prosthesis that provides stair ascent and descent capability, as well as ability for user-controlled transitions between walking, standing, stair ascent, and stair descent. The control system was implemented on a powered prosthesis and evaluated on a single unilateral transtibial amputee subject. The ability of the prosthesis to provide appropriate functionality during stair ascent and descent was assessed by comparing gait kinematics and kinetics of the prosthesis to those of a passive dynamic elastic response prosthesis and those of a set of non-amputee subjects...
May 2018: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/29742031/case-studies-in-neuroscience-sensations-elicited-and-discrimination-ability-from-nerve-cuff-stimulation-in-an-amputee-over-time
#6
Rochelle Ackerley, Helena Backlund Wasling, Max Ortiz Catalan, Rickard Brånemark, Johan Wessberg
The present case study details sensations elicited by electrical stimulation of peripheral nerve axons using an implanted nerve cuff electrode, in a participant with a transhumeral amputation. The participant uses an osseointegrated electromechanical interface, which enables skeletal attachment of the prosthesis and long-term, stable, bidirectional communication between the implanted electrodes and prosthetic arm. We focused on evoking somatosensory percepts, where we tracked and quantified the evolution of perceived sensations in the missing hand, which were evoked from electrical stimulation of the nerve, for over 2 years...
May 9, 2018: Journal of Neurophysiology
https://www.readbyqxmd.com/read/29689178/gender-differences-in-psychosocial-and-physical-outcomes-in-haitian-amputees
#7
Pey-Shan Wen, Marilys G Randolph, Leonard Elbaum, Mario De la Rosa
OBJECTIVE: The purpose of this study was to investigate the gender differences in psychosocial and physical outcomes in users of lower-extremity prostheses who became amputees after the 2010 earthquake in Haiti. METHOD: We enrolled 140 unilateral amputees in this cross-sectional study in Port-au-Prince, Haiti. Trained staff administered the assessments by reading the questions aloud to participants. Participants completed the Trinity Amputation and Prosthesis Experience Scales and Locomotor Capabilities Index about 2 yr after the earthquake...
May 2018: American Journal of Occupational Therapy: Official Publication of the American Occupational Therapy Association
https://www.readbyqxmd.com/read/29678418/a-new-method-to-quantify-liner-deformation-within-a-prosthetic-socket-for-below-knee-amputees
#8
Amy L Lenz, Katie A Johnson, Tamara Reid Bush
Many amputees who wear a leg prosthesis develop significant skin wounds on their residual limb. The exact cause of these wounds is unclear as little work has studied the interface between the prosthetic device and user. Our research objective was to develop a quantitative method for assessing displacement patterns of the gel liner during walking for patients with transtibial amputation. Using a reflective marker system and a custom clear socket, evaluations were conducted with a clear transparent test socket mounted over a plaster limb model and a deformable limb model...
April 13, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29676961/development-and-preliminary-evaluation-of-a-new-anatomically-based-prosthetic-alignment-method-for-below-knee-prosthesis
#9
Nahid Tafti, Masoud Karimlou, Mohammad Ali Mardani, Amir Salar Jafarpisheh, Gholam Reza Aminian, Reza Safari
The objectives of current study were to a) assess similarities and relationships between anatomical landmark-based angles and distances of lower limbs in unilateral transtibial amputees and b) develop and evaluate a new anatomically based static prosthetic alignment method. First sub-study assessed the anthropometrical differences and relationships between the lower limbs in the photographs taken from amputees. Data were analysed via paired t-test and regression analysis. Results show no significant differences in frontal and transverse planes...
April 20, 2018: Assistive Technology: the Official Journal of RESNA
https://www.readbyqxmd.com/read/29673566/apparent-motion-perception-in-lower-limb-amputees-with-phantom-sensations-obstacle-shunning-and-obstacle-tolerance
#10
Gianluca Saetta, Ilva Grond, Peter Brugger, Bigna Lenggenhager, Anthony J Tsay, Melita J Giummarra
Phantom limbs are the phenomenal persistence of postural and sensorimotor features of an amputated limb. Although immaterial, their characteristics can be modulated by the presence of physical matter. For instance, the phantom may disappear when its phenomenal space is invaded by objects ("obstacle shunning"). Alternatively, "obstacle tolerance" occurs when the phantom is not limited by the law of impenetrability and co-exists with physical objects. Here we examined the link between this under-investigated aspect of phantom limbs and apparent motion perception...
March 21, 2018: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/29626613/comparing-the-effects-of-dual-task-gait-testing-in-new-and-established-ambulators-with-lower-extremity-amputations
#11
Courtney Frengopoulos, Michael Wc Payne, Jeffrey D Holmes, Ricardo Viana, Susan W Hunter
BACKGROUND: Gait is a complex process that involves coordinating motor and sensory systems through higher-order cognitive processes. Walking with a prosthesis after lower extremity amputation challenges these processes. However, the factors that influence the cognitive-motor interaction in gait among lower extremity amputees has not been evaluated. To assess the interaction of cognition and mobility, individuals must be evaluated using the dual-task paradigm. OBJECTIVE: To investigate the effect of etiology and time with prosthesis on dual-task performance in those with lower extremity amputations...
April 4, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29623812/the-efficacy-of-the-ankle-mimicking-prosthetic-foot-prototype-4-0-during-walking-physiological-determinants
#12
Kevin De Pauw, Pierre Cherelle, Bart Roelands, Dirk Lefeber, Romain Meeusen
BACKGROUND: Evaluating the effectiveness of a novel prosthetic device during walking is an important step in product development. OBJECTIVE: To investigate the efficacy of a novel quasi-passive ankle prosthetic device, Ankle Mimicking Prosthetic Foot 4.0, during walking at different speeds, using physiological determinants in transtibial and transfemoral amputees. STUDY DESIGN: Nonrandomized crossover design for amputees. METHODS: Six able-bodied subjects, six unilateral transtibial amputees, and six unilateral transfemoral amputees underwent a 6-min walk test at normal speed, followed by series of 2-min walking at slow, normal, and fast speeds...
April 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29623811/assessment-of-the-compressive-and-tensile-mechanical-properties-of-materials-used-in-the-jaipur-foot-prosthesis
#13
Rachel H Teater, Kristine M Fischenich, Benjamin B Wheatley, Lisa Abrams, Sheryl A Sorby, Harlal Singh Mali, Anil Jain, Tammy L Haut Donahue
BACKGROUND: Designed by Dr. Sethi, the Jaipur Foot prosthesis is ideally suited for amputees in developing countries as it utilizes locally sourced, biodegradable, inexpensive materials and is focused on affordability and functionality. To date, however, no data have been reported on the material properties of the foot components. OBJECTIVES: The goal of this work was to evaluate mechanical properties of the Jaipur Foot components to guide foot design and manufacturing and reduce weight...
April 1, 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/29623025/impact-of-powered-knee-ankle-prosthesis-on-low-back-muscle-mechanics-in-transfemoral-amputees-a-case-series
#14
Chandrasekaran Jayaraman, Shenan Hoppe-Ludwig, Susan Deems-Dluhy, Matt McGuire, Chaithanya Mummidisetty, Rachel Siegal, Aileen Naef, Brian E Lawson, Michael Goldfarb, Keith E Gordon, Arun Jayaraman
Regular use of prostheses is critical for individuals with lower limb amputations to achieve everyday mobility, maintain physical and physiological health, and achieve a better quality of life. Use of prostheses is influenced by numerous factors, with prosthetic design playing a critical role in facilitating mobility for an amputee. Thus, prostheses design can either promote biomechanically efficient or inefficient gait behavior. In addition to increased energy expenditure, inefficient gait behavior can expose prosthetic user to an increased risk of secondary musculoskeletal injuries and may eventually lead to rejection of the prosthesis...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29614465/running-at-submaximal-speeds-the-role-of-the-intact-and-prosthetic-limbs-for-trans-tibial-amputees
#15
Siobhan C Strike, Daniela Acrone, Michael Orendurff
BACKGROUND: Dynamic Elastic Response prostheses are designed absorb and return strain energy in running. Past research has focused on running prostheses with a single toe spring designed for high speeds. RESEARCH QUESTION: To determine how runners with amputation modulate the ground reaction force of each limb to run at different speeds using a general-purpose dynamic prosthesis which has a heel spring. METHODS: Overground running data were collected in 16 recreational runners (8 transtibial amputee using their own BladeXT prosthesis and 8 controls) using Vicon Nexus V...
March 27, 2018: Gait & Posture
https://www.readbyqxmd.com/read/29580245/the-clinical-relevance-of-advanced-artificial-feedback-in-the-control-of-a-multi-functional-myoelectric-prosthesis
#16
Marko Markovic, Meike A Schweisfurth, Leonard F Engels, Tashina Bentz, Daniela Wüstefeld, Dario Farina, Strahinja Dosen
BACKGROUND: To effectively replace the human hand, a prosthesis should seamlessly respond to user intentions but also convey sensory information back to the user. Restoration of sensory feedback is rated highly by the prosthesis users, and feedback is critical for grasping in able-bodied subjects. Nonetheless, the benefits of feedback in prosthetics are still debated. The lack of consensus is likely due to the complex nature of sensory feedback during prosthesis control, so that its effectiveness depends on multiple factors (e...
March 27, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29579026/targeted-muscle-reinnervation-considerations-for-future-implementation-in-adolescents-and-younger-children
#17
Kevin J Zuo, Michael P Willand, Emily S Ho, Sandra Ramdial, Gregory H Borschel
Prosthetic options for patients with proximal upper limb absence are limited. Current above elbow prostheses may restore basic motor functions for crucial activities, but they are cumbersome to operate, lack sensory feedback, and are often abandoned. Targeted muscle reinnervation (TMR) is a novel surgical procedure that enhances the ability of patients with above elbow amputations to intuitively control a myoelectric prosthesis. By transferring multiple severed peripheral nerves to a robust target muscle, TMR restores physiologic continuity and enables more intuitive prosthetic control...
March 19, 2018: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/29566253/percutaneous-osseointegrated-prostheses-for-transfemoral-amputations
#18
Yan Li, Bennie Lindeque
The direct attachment of the osseointegrated prosthesis to the skeleton avoids the inherent problems of socket suspension. It also permits physiological weight bearing, improved range of motion in the proximal joint, and osseoperceptive sensor feedback, enabling better control of the artificial limb by amputees. This article describes the osseointegration program in Sweden based on the use of bone-anchored prostheses for transfemoral amputation rehabilitation. The authors discuss in detail the patient-centered evaluation, surgical technique, and postoperative rehabilitation protocol...
March 1, 2018: Orthopedics
https://www.readbyqxmd.com/read/29565293/towards-control-of-a-transhumeral-prosthesis-with-eeg-signals
#19
D S V Bandara, Jumpei Arata, Kazuo Kiguchi
Robotic prostheses are expected to allow amputees greater freedom and mobility. However, available options to control transhumeral prostheses are reduced with increasing amputation level. In addition, for electromyography-based control of prostheses, the residual muscles alone cannot generate sufficiently different signals for accurate distal arm function. Thus, controlling a multi-degree of freedom (DoF) transhumeral prosthesis is challenging with currently available techniques. In this paper, an electroencephalogram (EEG)-based hierarchical two-stage approach is proposed to achieve multi-DoF control of a transhumeral prosthesis...
March 22, 2018: Bioengineering
https://www.readbyqxmd.com/read/29544501/evaluation-of-emg-pattern-recognition-for-upper-limb-prosthesis-control-a-case-study-in-comparison-with-direct-myoelectric-control
#20
Linda Resnik, He Helen Huang, Anna Winslow, Dustin L Crouch, Fan Zhang, Nancy Wolk
BACKGROUND: Although electromyogram (EMG) pattern recognition (PR) for multifunctional upper limb prosthesis control has been reported for decades, the clinical benefits have rarely been examined. The study purposes were to: 1) compare self-report and performance outcomes of a transradial amputee immediately after training and one week after training of direct myoelectric control and EMG pattern recognition (PR) for a two-degree-of-freedom (DOF) prosthesis, and 2) examine the change in outcomes one week after pattern recognition training and the rate of skill acquisition in two subjects with transradial amputations...
March 15, 2018: Journal of Neuroengineering and Rehabilitation
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