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Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system

BACKGROUND: The users of today's commercial prosthetic hands are not given any conscious sensory feedback. To overcome this deficiency in prosthetic hands we have recently proposed a sensory feedback system utilising a "tactile display" on the remaining amputation residual limb acting...

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Autores principales: Antfolk, Christian, Balkenius, Christian, Lundborg, Göran, Rosén, Birgitta, Sebelius, Fredrik
Formato: Texto
Lenguaje:English
Publicado: BioMed Central 2010
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2949881/
https://www.ncbi.nlm.nih.gov/pubmed/20840758
http://dx.doi.org/10.1186/1475-925X-9-50
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author Antfolk, Christian
Balkenius, Christian
Lundborg, Göran
Rosén, Birgitta
Sebelius, Fredrik
author_facet Antfolk, Christian
Balkenius, Christian
Lundborg, Göran
Rosén, Birgitta
Sebelius, Fredrik
author_sort Antfolk, Christian
collection PubMed
description BACKGROUND: The users of today's commercial prosthetic hands are not given any conscious sensory feedback. To overcome this deficiency in prosthetic hands we have recently proposed a sensory feedback system utilising a "tactile display" on the remaining amputation residual limb acting as man-machine interface. Our system uses the recorded pressure in a hand prosthesis and feeds back this pressure onto the forearm skin. Here we describe the design and technical solution of the sensory feedback system aimed at hand prostheses for trans-radial/humeral amputees. Critical parameters for the sensory feedback system were investigated. METHODS: A sensory feedback system consisting of five actuators, control electronics and a test application running on a computer has been designed and built. Firstly, we investigate which force levels were applied to the forearm skin of the user while operating the sensory feedback system. Secondly, we study if the proposed system could be used together with a myoelectric control system. The displacement of the skin caused by the sensory feedback system would generate artefacts in the recorded myoelectric signals. Accordingly, EMG recordings were performed and an analysis of the these are included. The sensory feedback system was also preliminarily evaluated in a laboratory setting on two healthy non-amputated test subjects with a computer generating the stimuli, with regards to spatial resolution and force discrimination. RESULTS: We showed that the sensory feedback system generated approximately proportional force to the angle of control. The system can be used together with a myoelectric system as the artefacts, generated by the actuators, were easily removed using a simple filter. Furthermore, the application of the system on two test subjects showed that they were able to discriminate tactile sensation with regards to spatial resolution and level of force. CONCLUSIONS: The results of these initial experiments in non-amputees indicate that the proposed tactile display, in its simple form, can be used to relocate tactile input from an artificial hand to the forearm and that the system can coexist with a myoelectric control systems. The proposed system may be a valuable addition to users of myoelectric prosthesis providing conscious sensory feedback during manipulation of objects.
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spelling pubmed-29498812010-10-06 Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system Antfolk, Christian Balkenius, Christian Lundborg, Göran Rosén, Birgitta Sebelius, Fredrik Biomed Eng Online Research BACKGROUND: The users of today's commercial prosthetic hands are not given any conscious sensory feedback. To overcome this deficiency in prosthetic hands we have recently proposed a sensory feedback system utilising a "tactile display" on the remaining amputation residual limb acting as man-machine interface. Our system uses the recorded pressure in a hand prosthesis and feeds back this pressure onto the forearm skin. Here we describe the design and technical solution of the sensory feedback system aimed at hand prostheses for trans-radial/humeral amputees. Critical parameters for the sensory feedback system were investigated. METHODS: A sensory feedback system consisting of five actuators, control electronics and a test application running on a computer has been designed and built. Firstly, we investigate which force levels were applied to the forearm skin of the user while operating the sensory feedback system. Secondly, we study if the proposed system could be used together with a myoelectric control system. The displacement of the skin caused by the sensory feedback system would generate artefacts in the recorded myoelectric signals. Accordingly, EMG recordings were performed and an analysis of the these are included. The sensory feedback system was also preliminarily evaluated in a laboratory setting on two healthy non-amputated test subjects with a computer generating the stimuli, with regards to spatial resolution and force discrimination. RESULTS: We showed that the sensory feedback system generated approximately proportional force to the angle of control. The system can be used together with a myoelectric system as the artefacts, generated by the actuators, were easily removed using a simple filter. Furthermore, the application of the system on two test subjects showed that they were able to discriminate tactile sensation with regards to spatial resolution and level of force. CONCLUSIONS: The results of these initial experiments in non-amputees indicate that the proposed tactile display, in its simple form, can be used to relocate tactile input from an artificial hand to the forearm and that the system can coexist with a myoelectric control systems. The proposed system may be a valuable addition to users of myoelectric prosthesis providing conscious sensory feedback during manipulation of objects. BioMed Central 2010-09-14 /pmc/articles/PMC2949881/ /pubmed/20840758 http://dx.doi.org/10.1186/1475-925X-9-50 Text en Copyright ©2010 Antfolk et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research
Antfolk, Christian
Balkenius, Christian
Lundborg, Göran
Rosén, Birgitta
Sebelius, Fredrik
Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
title Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
title_full Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
title_fullStr Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
title_full_unstemmed Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
title_short Design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
title_sort design and technical construction of a tactile display for sensory feedback in a hand prosthesis system
topic Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2949881/
https://www.ncbi.nlm.nih.gov/pubmed/20840758
http://dx.doi.org/10.1186/1475-925X-9-50
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