Advanced

A Tactile Display System for Hand Prostheses to Discriminate Pressure and Individual Finger Localization

Antfolk, Christian LU ; Balkenius, Christian LU ; Lundborg, Göran LU ; Rosén, Birgitta LU and Sebelius, Fredrik LU (2010) In Journal of Medical and Biological Engineering 30(6). p.355-359
Abstract
No current commercially available myoelectrically controlled prosthetic hands provide conscious sensory feedback to the user. A system aiming at relocation of sensory input from a prosthetic hand equipped with force sensors to the forearm skin of amputees, a tactile display, has been developed and constructed. The system consists of five piezoresistive force sensors or, alternatively, a prosthetic hand equipped with force sensors, five digital servomotors with a lever and a circular plastic disk pushing on the skin, control electronics based on an MSP430 microcontroller and a test application implemented in LabVIEW running on a PC. The tactile display system is intended to be integrated into the socket of a hand prosthesis and used as a... (More)
No current commercially available myoelectrically controlled prosthetic hands provide conscious sensory feedback to the user. A system aiming at relocation of sensory input from a prosthetic hand equipped with force sensors to the forearm skin of amputees, a tactile display, has been developed and constructed. The system consists of five piezoresistive force sensors or, alternatively, a prosthetic hand equipped with force sensors, five digital servomotors with a lever and a circular plastic disk pushing on the skin, control electronics based on an MSP430 microcontroller and a test application implemented in LabVIEW running on a PC. The tactile display system is intended to be integrated into the socket of a hand prosthesis and used as a conscious sensory feedback system for hand amputees using a myoelectrically controlled hand prosthesis. The system will provide continuous force feedback from sensors in the fingertips of each prosthetic finger and will likely improve the users' controllability and perception of the prosthetic hand. Here we report on tests made on "a five site" localization discrimination task and three pressure level discrimination tasks on the forearm of five healthy participants (non-amputees) using the LabView application to generate the stimulations. A mean five-finger discrimination accuracy of 86% and a mean three-level pressure discrimination accuracy of 93% were achieved, indicating the system to be a viable method of producing sensory feedback on the level of individual fingers. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hand prosthesis, Tactile display, Sensory feedback
in
Journal of Medical and Biological Engineering
volume
30
issue
6
pages
355 - 359
publisher
Institute of Biomedical Engineering, National Cheng Kung University
external identifiers
  • wos:000285723100002
  • scopus:78751506000
ISSN
1609-0985
DOI
10.5405/jmbe.766
language
English
LU publication?
yes
id
c9c846fe-8ea5-4ada-ad01-1c94b0ec48f6 (old id 1814791)
date added to LUP
2011-03-02 13:24:09
date last changed
2018-05-29 10:16:21
@article{c9c846fe-8ea5-4ada-ad01-1c94b0ec48f6,
  abstract     = {No current commercially available myoelectrically controlled prosthetic hands provide conscious sensory feedback to the user. A system aiming at relocation of sensory input from a prosthetic hand equipped with force sensors to the forearm skin of amputees, a tactile display, has been developed and constructed. The system consists of five piezoresistive force sensors or, alternatively, a prosthetic hand equipped with force sensors, five digital servomotors with a lever and a circular plastic disk pushing on the skin, control electronics based on an MSP430 microcontroller and a test application implemented in LabVIEW running on a PC. The tactile display system is intended to be integrated into the socket of a hand prosthesis and used as a conscious sensory feedback system for hand amputees using a myoelectrically controlled hand prosthesis. The system will provide continuous force feedback from sensors in the fingertips of each prosthetic finger and will likely improve the users' controllability and perception of the prosthetic hand. Here we report on tests made on "a five site" localization discrimination task and three pressure level discrimination tasks on the forearm of five healthy participants (non-amputees) using the LabView application to generate the stimulations. A mean five-finger discrimination accuracy of 86% and a mean three-level pressure discrimination accuracy of 93% were achieved, indicating the system to be a viable method of producing sensory feedback on the level of individual fingers.},
  author       = {Antfolk, Christian and Balkenius, Christian and Lundborg, Göran and Rosén, Birgitta and Sebelius, Fredrik},
  issn         = {1609-0985},
  keyword      = {Hand prosthesis,Tactile display,Sensory feedback},
  language     = {eng},
  number       = {6},
  pages        = {355--359},
  publisher    = {Institute of Biomedical Engineering, National Cheng Kung University},
  series       = {Journal of Medical and Biological Engineering},
  title        = {A Tactile Display System for Hand Prostheses to Discriminate Pressure and Individual Finger Localization},
  url          = {http://dx.doi.org/10.5405/jmbe.766},
  volume       = {30},
  year         = {2010},
}