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https://www.readbyqxmd.com/read/29747672/two-ways-to-improve-myoelectric-control-for-a-transhumeral-amputee-after-targeted-muscle-reinnervation-a-case-study
#1
Yang Xu, Dingguo Zhang, Yang Wang, Juntao Feng, Wendong Xu
BACKGROUND: Myoelectric control of multifunctional prostheses is challenging for individuals with high-level amputations due to insufficient surface electromyography (sEMG) signals. A surgical technique called targeted muscle reinnervation (TMR) has achieved impressive improvements in myoelectric control by providing more sEMG control signals. In this case, some channels of sEMG signals are coupled after TMR, which limits the performance of conventional amplitude-based control for upper-limb prostheses...
May 10, 2018: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/29742031/case-studies-in-neuroscience-sensations-elicited-and-discrimination-ability-from-nerve-cuff-stimulation-in-an-amputee-over-time
#2
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/29565293/towards-control-of-a-transhumeral-prosthesis-with-eeg-signals
#3
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/29456499/can-we-achieve-intuitive-prosthetic-elbow-control-based-on-healthy-upper-limb-motor-strategies
#4
Manelle Merad, Étienne de Montalivet, Amélie Touillet, Noël Martinet, Agnès Roby-Brami, Nathanaël Jarrassé
Most transhumeral amputees report that their prosthetic device lacks functionality, citing the control strategy as a major limitation. Indeed, they are required to control several degrees of freedom with muscle groups primarily used for elbow actuation. As a result, most of them choose to have a one-degree-of-freedom myoelectric hand for grasping objects, a myoelectric wrist for pronation/supination, and a body-powered elbow. Unlike healthy upper limb movements, the prosthetic elbow joint angle, adjusted prior to the motion, is not involved in the overall upper limb movements, causing the rest of the body to compensate for the lack of mobility of the prosthesis...
2018: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/29422484/spiral-sockets-for-various-types-of-stumps-in-transhumeral-amputees-a-case-series
#5
Yukiyo Shimizu, Hirotaka Mutsuzaki, Hiroyuki Torishima, Kenichi Yoshikawa, Daisuke Katane, Ryoko Takeuchi, Yuki Mataki, Kayo Tokeji, Yasuyoshi Wadano
BACKGROUND: Fitting a stump prosthesis is difficult in transhumeral amputees because of the stump's conical form. Shoulder harnesses for suspension can cause neck and shoulder pain. We developed a novel spiral socket transhumeral prosthesis to overcome these difficulties. We investigated its safety and effects in transhumeral amputees. CASE REPORT: Five transhumeral amputees with a mean age of 50.8 ± 23.8 (range, 19-75 years) were fitted with the spiral socket between April 2013 and February 2017...
February 7, 2018: European Journal of Physical and Rehabilitation Medicine
https://www.readbyqxmd.com/read/29261703/transhumeral-loading-during-advanced-upper-extremity-activities-of-daily-living
#6
Alex J Drew, Morgan T Izykowski, Kent N Bachus, Heath B Henninger, K Bo Foreman
Percutaneous osseointegrated (OI) implants for direct skeletal attachment of upper extremity prosthetics represent an alternative to traditional socket suspension that may yield improved patient function and satisfaction. This is especially true in high-level, transhumeral amputees where prosthetic fitting is challenging and abandonment rates remain high. However, maintaining mechanical integrity of the bone-implant interface is crucial for safe clinical introduction of this technology. The collection of population data on the transhumeral loading environment will aid in the design of compliance and overload protection devices that mitigate the risk of periprosthetic fracture...
2017: PloS One
https://www.readbyqxmd.com/read/29062019/myoelectric-pattern-recognition-outperforms-direct-control-for-transhumeral-amputees-with-targeted-muscle-reinnervation-a-randomized-clinical-trial
#7
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/29060523/motor-imagery-classification-of-upper-limb-movements-based-on-spectral-domain-features-of-eeg-patterns
#8
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/28628623/use-of-the-deka-arm-for-amputees-with-brachial-plexus-injury-a-case-series
#9
Linda Resnik, Christopher Fantini, Gail Latlief, Samuel Phillips, Nicole Sasson, Eve Sepulveda
OBJECTIVE: Patients with upper limb amputation and brachial plexus injuries have high rates of prosthesis rejection. Study purpose is to describe experiences of subjects with transhumeral amputation and brachial plexus injury, who were fit with, and trained to use, a DEKA Arm. METHODS: This was a mixed-methods study utilizing qualitative (e.g. interview, survey) and quantitative data (e.g. self-report and performance measures). Subject 1, a current prosthesis user, had a shoulder arthrodesis...
2017: PloS One
https://www.readbyqxmd.com/read/28470463/-the-endo-exo-prosthesis-treatment-concept-improvement-in-quality-of-life-after-limb-amputation
#10
REVIEW
T Hoffmeister, F Schwarze, H H Aschoff
Osseointegrated, percutaneous implants as the force bearer for exoprosthetics after limb amputation have been used in individual cases for clinical rehabilitation of amputees during the past years. Most experience in this field in Germany has been accumulated at the Sana Klinik in Lübeck with the so-called endo-exo prosthesis (EEP) system. The two-step implantation procedure can now be considered as reliable. Following a well-documented learning curve initial soft tissue problems concerning the cutaneous stoma can now be regarded as exceptions...
May 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28396957/-transcutaneous-osseointegrated-prosthesis-top-after-limb-amputation-status-quo-and-perspectives
#11
REVIEW
Christian Willy, Christian Krettek
The majority of transfemoral and transtibial amputees can be functionally fitted with conventional suspension sockets; however, due to socket problems using conventional stump care, 60% of the patients have limited function and even in younger patients approximately one sixth are unable to wear the prosthesis daily. After the introduction of transcutaneous osseointegrated prostheses (TOP) the inherent problems of socket-stump care can be avoided for these patients. Against this background this article reviews the recent clinical development of TOP in Sweden, Germany, the Netherlands, Australia and USA currently in nine centers...
May 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28229193/osseointegrated-prostheses-for-rehabilitation-following-amputation-the-pioneering-swedish-model
#12
REVIEW
Yan Li, Rickard Brånemark
The direct attachment of osseointegrated (OI) prostheses to the skeleton avoids the inherent problems of socket suspension. It also provides physiological weight bearing, improved range of motion in the proximal joint, as well as osseoperceptive sensory feedback, enabling better control of the artificial limbs by amputees. The present article briefly reviews the pioneering efforts on extremity osseointegration surgeries in Sweden and the development of the OPRA (Osseointegrated Prostheses for the Rehabilitation of Amputees) program...
April 2017: Der Unfallchirurg
https://www.readbyqxmd.com/read/28091278/brief-activity-performance-measure-for-upper-limb-amputees-bam-ula
#13
Linda Resnik, Matthew Borgia, Frantzy Acluche
BACKGROUND: Measures of activity performance for adults with upper limb amputation are needed. The purposes of this study were to evaluate the measurement properties of a new measure of activity performance for adults with upper limb amputation, which we call the Brief Activity Measure for Upper Limb Amputees (BAM-ULA) and to compare BAM-ULA scores for users of different types of prostheses. METHODS: In all, 35 persons with upper limb amputation were administered the BAM-ULA, twice within 1 week...
February 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/28061779/a-motion-classification-strategy-based-on-semg-eeg-signal-combination-for-upper-limb-amputees
#14
Xiangxin Li, Oluwarotimi Williams Samuel, Xu Zhang, Hui Wang, Peng Fang, Guanglin Li
BACKGROUND: Most of the modern motorized prostheses are controlled with the surface electromyography (sEMG) recorded on the residual muscles of amputated limbs. However, the residual muscles are usually limited, especially after above-elbow amputations, which would not provide enough sEMG for the control of prostheses with multiple degrees of freedom. Signal fusion is a possible approach to solve the problem of insufficient control commands, where some non-EMG signals are combined with sEMG signals to provide sufficient information for motion intension decoding...
January 7, 2017: Journal of Neuroengineering and Rehabilitation
https://www.readbyqxmd.com/read/27824734/targeted-muscle-reinnervation-for-transradial-amputation-description-of-operative-technique
#15
Emily N Morgan, Benjamin Kyle Potter, Jason M Souza, Scott M Tintle, George P Nanos
Targeted muscle reinnervation (TMR) is a revolutionary surgical technique that, together with advances in upper extremity prostheses and advanced neuromuscular pattern recognition, allows intuitive and coordinated control in multiple planes of motion for shoulder disarticulation and transhumeral amputees. TMR also may provide improvement in neuroma-related pain and may represent an opportunity for sensory reinnervation as advances in prostheses and haptic feedback progress. Although most commonly utilized following shoulder disarticulation and transhumeral amputations, TMR techniques also represent an exciting opportunity for improvement in integrated prosthesis control and neuroma-related pain improvement in patients with transradial amputations...
December 2016: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/27638013/attachment-of-upper-arm-prostheses-with-a-subcutaneous-osseointegrated-implant-in-transhumeral-amputees
#16
Stefan Salminger, Andreas Gradischar, Richard Skiera, Aidan D Roche, Agnes Sturma, Christian Hofer, Oskar C Aszmann
BACKGROUND: The stump-socket interface is of utmost importance for prosthetic function in transhumeral amputees. Stability of this connection may be improved using a newly designed subcutaneous implant. OBJECTIVES: The purpose was to determine the effect of the implant together with customized socket designs on the range of motion of the shoulder and the prosthetic function compared to conventional fitting. STUDY DESIGN: Case series. METHODS: The range of motion was measured with scaled metrics and the prosthetic function evaluated with the Southampton Hand Assessment Procedure and the Box and Block Test...
February 2018: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/27166714/an-anthropomorphic-transhumeral-prosthesis-socket-developed-based-on-an-oscillometric-pump-and-controlled-by-force-sensitive-resistor-pressure-signals
#17
N A Abd Razak, H Gholizadeh, N Hasnan, N A Abu Osman, S S Mohd Fadzil, N A Hashim
While considering the importance of the interface between amputees and prosthesis sockets, we study an anthropomorphic prosthesis socket whose size can be dynamically changed according to the requirements of the residual limb. First, we introduce the structure and function of the anthropomorphic prosthesis socket. Second, we study the dynamic model of the prosthesis system and analyze the dynamic characteristics of the prosthesis socket system, the inputs of an oscillometric pump, and the control mechanism of force-sensitive resistor (FSR) pressure signals...
February 1, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/27164596/classification-of-phantom-finger-hand-wrist-and-elbow-voluntary-gestures-in-transhumeral-amputees-with-semg
#18
Nathanael Jarrasse, Caroline Nicol, Amelie Touillet, Florian Richer, Noel Martinet, Jean Paysant, Jozina Bernardina de Graaf
Decoding finger and hand movements from sEMG electrodes placed on the forearm of transradial amputees has been commonly studied by many research groups. A few recent studies have shown an interesting phenomenon: simple correlations between distal phantom finger, hand and wrist voluntary movements and muscle activity in the residual upper arm in transhumeral amputees, i.e., of muscle groups that, prior to amputation, had no physical effect on the concerned hand and wrist joints. In this study, we are going further into the exploration of this phenomenon by setting up an evaluation study of phantom finger, hand, wrist and elbow (if present) movement classification based on the analysis of surface electromyographic (sEMG) signals measured by multiple electrodes placed on the residual upper arm of five transhumeral amputees with a controllable phantom limb who did not undergo any reinnervation surgery...
January 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/26932982/cutaneous-sensory-outcomes-from-three-transhumeral-targeted-reinnervation-cases
#19
COMPARATIVE STUDY
Jacqueline S Hebert, K Ming Chan, Michael R Dawson
BACKGROUND: Although targeted muscle reinnervation has been shown to be effective in enhancing prosthetic control for upper limb amputees, restored hand sensations have been variable. An understanding of possible sensory feedback channels is crucial in working toward more effective closed-loop prosthetic control. OBJECTIVES: To compare sensory outcomes of different targeted sensory reinnervation approaches. STUDY DESIGN: Case series, cross-sectional, and retrospective...
June 2016: Prosthetics and Orthotics International
https://www.readbyqxmd.com/read/26780786/control-of-a-robotic-hand-using-a-tongue-control-system-a-prosthesis-application
#20
Daniel Johansen, Christian Cipriani, Dejan B Popovic, Lotte N S A Struijk
OBJECTIVE: The aim of this study was to investigate the feasibility of using an inductive tongue control system (ITCS) for controlling robotic/prosthetic hands and arms. METHODS: This study presents a novel dual modal control scheme for multigrasp robotic hands combining standard electromyogram (EMG) with the ITCS. The performance of the ITCS control scheme was evaluated in a comparative study. Ten healthy subjects used both the ITCS control scheme and a conventional EMG control scheme to complete grasping exercises with the IH1 Azzurra robotic hand implementing five grasps...
July 2016: IEEE Transactions on Bio-medical Engineering
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