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https://www.readbyqxmd.com/read/29352411/the-impact-of-using-an-upper-limb-prosthesis-on-the-perception-of-real-and-illusory-weight-differences
#1
Gavin Buckingham, Johnny Parr, Greg Wood, Samuel Vine, Pan Dimitriou, Sarah Day
Little is known about how human perception is affected using an upper-limb prosthesis. To shed light on this topic, we investigated how using an upper-limb prosthesis affects individuals' experience of object weight. First, we examined how a group of upper-limb amputee prosthetic users experienced real mass differences and illusory weight differences in the context of the 'size-weight' illusion. Surprisingly, the upper-limb prosthetic users reported a markedly smaller illusion than controls, despite equivalent perceptions of a real mass difference...
January 19, 2018: Psychonomic Bulletin & Review
https://www.readbyqxmd.com/read/29350089/a-comparative-analysis-of-internal-bone-remodelling-concepts-in-a-novel-implant-for-direct-skeletal-attachment-of-limb-prosthesis-evaluation-a-finite-element-analysis
#2
Piotr Prochor, Eugeniusz Sajewicz
Nowadays, numerous internal bone remodelling concepts are under development, in order to estimate long-term functionality of implants by evaluating the intensity of stress-shielding effect. This effect is also analysed for the implants for direct skeletal attachment, considered as a better exoprosthesis fixation method than prosthetic sockets. Most of bone remodelling approaches are based on basic concepts, differing with certain assumptions, which may affect the accuracy of the results. This article compares commonly used internal bone remodelling concepts and evaluates the functionality of the proposed Limb Prosthesis Osseointegrated Fixation System for direct skeletal attachment of limb prosthesis in comparison with two currently available implants: the Intraosseous Transcutaneous Amputation Prosthesis and the Osseointegrated Prostheses for the Rehabilitation of Amputees...
January 1, 2018: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/29322812/adjustment-to-finger-amputation-and-silicone-finger-prosthesis-use
#3
Zala Kuret, Helena Burger, Gaj Vidmar, Tomaz Maver
PURPOSE: Finger amputations are the most common amputations of upper limbs. They influence hand function, general functioning and quality of life. One of the possibilities for rehabilitation after finger amputation is fitting a silicone finger prosthesis. We wanted to evaluate the adjustment to amputation and prosthesis use in patients after finger amputation. METHODS: We included 42 patients with partial or complete single or multiple finger amputation of one hand who visited the outpatient clinic for prosthetics and orthotics at our institute and received a silicone prosthesis...
January 11, 2018: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29321625/cerebellar-grey-matter-modifications-in-lower-limb-amputees-not-using-prosthesis
#4
Antonella Di Vita, Maddalena Boccia, Liana Palermo, Federico Nemmi, Marco Traballesi, Stefano Brunelli, Roberto De Giorgi, Gaspare Galati, Cecilia Guariglia
Plastic brain changes following peripheral deafferentation, in particular those following limb amputations, are well-documented, with significant reduction of grey matter (GM) in the sensory-motor cerebral areas representing the amputated limb. However, few studies have investigated the role played by the use of a prosthesis in these structural brain modifications. Here we hypothesized that using a functional prosthesis that allows individuals to perform actions may reduce grey matter reduction. We investigated the brain structural reorganization following lower limb amputation by using a Voxel Based Morphometry (VBM) analysis of structural magnetic resonance imaging (MRI) in 8 right-handed individuals with lower limb amputation (LLA) fitted with prostheses (LLAwp), compared to 6 LLA who had never used a prosthesis (LLAnp)...
January 10, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320640/syme-amputation-a-systematic-review
#5
Rudwina Braaksma, Pieter U Dijkstra, Jan H B Geertzen
BACKGROUND: In the decision-making process toward an amputation of the lower extremity, knowledge about patient-related outcomes after amputation and rehabilitation is important. We have not found a systematic review that provides this knowledge for Syme amputation. The aim of this study was to present an overview of outcomes after a Syme amputation grouped according to the International Classification of Functioning, Disability and Health (ICF) model, focusing on body structures and functions, activities, and participation...
January 1, 2018: Foot & Ankle International
https://www.readbyqxmd.com/read/29276305/stable-robust-hybrid-zero-dynamics-control-of-powered-lower-limb-prostheses
#6
Anne E Martin, Robert D Gregg
To improve the quality of life for lower-limb amputees, powered prostheses are being developed. Advanced control schemes from the field of bipedal robots, such as hybrid zero dynamics (HZD), may provide great performance. HZD-based control specifies the motion of the actuated joints using output functions to be zeroed, and the required torques are calculated using input-output linearization. For one-step periodic gaits, there is an analytic metric of stability. To apply HZD-based control on a powered prosthesis, several modifications must be made...
August 2017: IEEE Transactions on Automatic Control
https://www.readbyqxmd.com/read/29215082/the-myokinetic-control-interface-tracking-implanted-magnets-as-a-means-for-prosthetic-control
#7
S Tarantino, F Clemente, D Barone, M Controzzi, C Cipriani
Upper limb amputation deprives individuals of their innate ability to manipulate objects. Such disability can be restored with a robotic prosthesis linked to the brain by a human-machine interface (HMI) capable of decoding voluntary intentions, and sending motor commands to the prosthesis. Clinical or research HMIs rely on the interpretation of electrophysiological signals recorded from the muscles. However, the quest for an HMI that allows for arbitrary and physiologically appropriate control of dexterous prostheses, is far from being completed...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29201828/hand-functions-of-myoelectric-and-3d-printed-pressure-sensored-prosthetics-a-comparative-study
#8
Kyu Ho Lee, Hobeom Bin, KeunBae Kim, So Young Ahn, Bong-Ok Kim, Soo-Kyung Bok
The loss of an upper limb significantly limits the functional activities of daily living. A huge emphasis is placed on the manipulation, shape, weight, and comfort of a prosthesis, to enable its use as an inherent body part. Even with technological advances, customized upper-extremity myoelectric prosthesis remain heavy and expensive. The high cost of upper-extremity prosthesis is an especially steep economic barrier for patients. Three-dimensional (3D) printing is a promising avenue for reducing the cost of prosthesis...
October 2017: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/29190727/influence-of-the-type-of-training-task-on-intermanual-transfer-effects-in-upper-limb-prosthesis-training-a-randomized-pre-posttest-study
#9
Sietske Romkema, Raoul M Bongers, Corry K van der Sluis
Intermanual transfer, the transfer of motor skills from the trained hand to the untrained hand, can be used to train upper limb prosthesis skills. The aim of this study was to determine the relation between the magnitude of the intermanual transfer effect and the type of training task. The used tasks were based on different aspects of prosthetic handling: reaching, grasping, grip-force production and functional tasks. A single-blinded clinical trial, with a pre-posttest design was executed. Seventy-one able-bodied, right-handed participants were randomly assigned to four training and two control groups...
2017: PloS One
https://www.readbyqxmd.com/read/29184493/step-to-step-ankle-inversion-eversion-torque-modulation-can-reduce-effort-associated-with-balance
#10
Myunghee Kim, Steven H Collins
Below-knee amputation is associated with higher energy expenditure during walking, partially due to difficulty maintaining balance. We previously found that once-per-step push-off work control can reduce balance-related effort, both in simulation and in experiments with human participants. Simulations also suggested that changing ankle inversion/eversion torque on each step, in response to changes in body state, could assist with balance. In this study, we investigated the effects of ankle inversion/eversion torque modulation on balance-related effort among amputees (N = 5) using a multi-actuated ankle-foot prosthesis emulator...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29178940/restoration-of-motor-control-and-proprioceptive-and-cutaneous-sensation-in-humans-with-prior-upper-limb-amputation-via-multiple-utah-slanted-electrode-arrays-useas-implanted-in-residual-peripheral-arm-nerves
#11
Suzanne Wendelken, David M Page, Tyler Davis, Heather A C Wark, David T Kluger, Christopher Duncan, David J Warren, Douglas T Hutchinson, Gregory A Clark
BACKGROUND: Despite advances in sophisticated robotic hands, intuitive control of and sensory feedback from these prostheses has been limited to only 3-degrees-of-freedom (DOF) with 2 sensory percepts in closed-loop control. A Utah Slanted Electrode Array (USEA) has been used in the past to provide up to 81 sensory percepts for human amputees. Here, we report on the advanced capabilities of multiple USEAs implanted in the residual peripheral arm nerves of human amputees for restoring control of 5 DOF and sensation of up to 131 proprioceptive and cutaneous hand sensory percepts...
November 25, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29167568/elite-long-jumpers-with-below-the-knee-prostheses-approach-the-board-slower-but-take-off-more-effectively-than-non-amputee-athletes
#12
Steffen Willwacher, Johannes Funken, Kai Heinrich, Ralf Müller, Hiroaki Hobara, Alena M Grabowski, Gert-Peter Brüggemann, Wolfgang Potthast
The use of technological aids to improve sport performance ('techno doping') and inclusion of Paralympic athletes in Olympic events are matters of ongoing debate. Recently, a long jumper with a below the knee amputation (BKA) achieved jump distances similar to world-class athletes without amputations, using a carbon fibre running-specific prosthesis (RSP). We show that athletes with BKA utilize a different, more effective take-off technique in the long jump, which provided the best athlete with BKA a performance advantage of at least 0...
November 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29144392/design-and-development-of-a-novel-upper-limb-cycling-prosthesis
#13
Akira Tiele, Shivam Soni-Sadar, Jack Rowbottom, Shilen Patel, Edward Mathewson, Samuel Pearson, David Hutchins, John Head, Stephen Hutchins
The rise in popularity of the Paralympics in recent years has created a need for effective, low-cost sports-prosthetic devices for upper-limb amputees. There are various opportunities for lower-limb amputees to participate in cycling; however, there are only few options for those with upper-limb amputations. If the individual previously participated in cycling, a cycling-specific prosthesis could allow these activities to be integrated into rehabilitation methods. This article describes the processes involved with designing, developing and manufacturing such a prosthesis...
November 16, 2017: Bioengineering
https://www.readbyqxmd.com/read/29126767/the-quality-of-life-analysis-of-knee-prosthesis-with-complete-microprocessor-control-in-trans-femoral-amputees
#14
Yavuz Saglam, Baris Gulenc, Fevzi Birisik, Ali Ersen, Ebru Yilmaz Yalcinkaya, Onder Yazicioglu
OBJECTIVE: The aim of this study was to analyze the patient demographics, etiology of limb loss as well as reporting SF-36 scores for microprocessor prosthesis users in Turkish population. METHODS: We reviewed 72 patients (61 male and 11 female; mean age: 37.7 ± 10.7) with uni-lateral, above knee amputation and a history of regular and microprocessor prosthesis use. All patients were called back for a last follow-up and they were asked to fill a self-administered general health status questionnaire (SF-36)...
November 7, 2017: Acta Orthopaedica et Traumatologica Turcica
https://www.readbyqxmd.com/read/29101394/interactions-between-transfemoral-amputees-and-a-powered-knee-prosthesis-during-load-carriage
#15
Andrea Brandt, Yue Wen, Ming Liu, Jonathan Stallings, He Helen Huang
Machines and humans become mechanically coupled when lower limb amputees walk with powered prostheses, but these two control systems differ in adaptability. We know little about how they interact when faced with real-world physical demands (e.g. carrying loads). Here, we investigated how each system (i.e. amputee and powered prosthesis) responds to changes in the prosthesis mechanics and gravitational load. Five transfemoral amputees walked with and without load (i.e. weighted backpack) and a powered knee prosthesis with two pre-programmed controller settings (i...
November 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29062019/myoelectric-pattern-recognition-outperforms-direct-control-for-transhumeral-amputees-with-targeted-muscle-reinnervation-a-randomized-clinical-trial
#16
Levi J Hargrove, Laura A Miller, Kristi Turner, Todd A Kuiken
Recently commercialized powered prosthetic arm systems hold great potential in restoring function for people with upper-limb loss. However, effective use of such devices remains limited by conventional (direct) control methods, which rely on electromyographic signals produced from a limited set of muscles. Targeted Muscle Reinnervation (TMR) is a nerve transfer procedure that creates additional recording sites for myoelectric prosthesis control. The effects of TMR may be enhanced when paired with pattern recognition technology...
October 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29060946/target-of-physiological-gait-realization-of-speed-adaptive-control-for-a-prosthetic-knee-during-swing-flexion
#17
Wujing Cao, Hongliu Yu, Weiliang Zhao, Jin Li, Xiaodong Wei
BACKGROUND: Prosthetic knee is the most important component of lower limb prosthesis. Speed adaptive for prosthetic knee during swing flexion is the key method to realize physiological gait. OBJECTIVE: This study aims to discuss the target of physiological gait, propose a speed adaptive control method during swing flexion and research the damping adjustment law of intelligent hydraulic prosthetic knee. METHODS: According to the physiological gait trials of healthy people, the control target during swing flexion is defined...
October 13, 2017: Technology and Health Care: Official Journal of the European Society for Engineering and Medicine
https://www.readbyqxmd.com/read/29060523/motor-imagery-classification-of-upper-limb-movements-based-on-spectral-domain-features-of-eeg-patterns
#18
Oluwarotimi Williams Samuel, Xiangxin Li, Yanjuan Geng, Pang Feng, Shixiong Chen, Guanglin Li
Surface electromyography pattern recognition methods have been widely applied to decode limb movement intentions for prosthesis control. These methods generally require amputees to provide sufficient myoelectric signals from their residual limb muscles. Previous studies have shown that amputees with high level amputation or neuromuscular disorder usually do not have sufficient residual limb muscles to provide enough myoelectric signals for accurate identification of limb movements. Electroencephalography (EEG), another bioelectric signal associated with limb movements has also been proposed and used for decoding the limb motion intents of humans...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29054880/common-synaptic-input-to-motor-neurons-and-neural-drive-to-targeted-reinnervated-muscles
#19
D Farina, A M Castronovo, I Vujaklija, A Sturma, S Salminger, C Hofer, O C Aszmann
We compared the behaviour of motor neurons innervating their physiological muscle targets with motor neurons from the same spinal segment whose axons were surgically redirected to remnant muscles (targeted muscle reinnervation). The objective was to assess whether motor neurons with non-physiological innervation receive similar synaptic input and could be voluntary controlled as motor neurons with natural innervation. For this purpose, we acquired high-density EMG signals from the biceps brachii in 5 male trans-humeral amputees who underwent targeted reinnervation of this muscle by the ulnar nerve and from the first dorsal interosseous muscle of 5 healthy individuals to investigate the natural innervation of the ulnar nerve...
October 20, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29021127/fall-detection-in-individuals-with-lower-limb-amputations-using-mobile-phones-machine-learning-enhances-robustness-for-real-world-applications
#20
Nicholas Shawen, Luca Lonini, Chaithanya Krishna Mummidisetty, Ilona Shparii, Mark V Albert, Konrad Kording, Arun Jayaraman
BACKGROUND: Automatically detecting falls with mobile phones provides an opportunity for rapid response to injuries and better knowledge of what precipitated the fall and its consequences. This is beneficial for populations that are prone to falling, such as people with lower limb amputations. Prior studies have focused on fall detection in able-bodied individuals using data from a laboratory setting. Such approaches may provide a limited ability to detect falls in amputees and in real-world scenarios...
October 11, 2017: JMIR MHealth and UHealth
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