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Touch on predefined areas on the forearm can be associated with specific fingers : Towards a new principle for sensory feedback in hand prostheses

Wijk, Ulrika LU ; Svensson, Pamela LU ; Antfolk, Christian LU ; Carlsson, Ingela K LU ; Björkman, Anders LU and Rosén, Birgitta LU (2019) In Journal of Rehabilitation Medicine 51(3). p.209-216
Abstract

OBJECTIVE: Currently available hand prostheses lack sensory feedback. A "phantom hand map", a referred sensation, on the skin of the residual arm is a possible target to provide amputees with non-invasive somatotopically matched sensory feedback. How-ever, not all amputees experience a phantom hand map. The aim of this study was to explore whether touch on predefined areas on the forearm can be associated with specific fingers.

DESIGN: A longitudinal cohort study.

SUBJECTS: A total of 31 able-bodied individuals.

METHODS: A "tactile display" was developed consisting of 5 servo motors, which provided the user with mechanotactile stimulus. Predefined pressure points on the volar aspect of the forearm were stimulated... (More)

OBJECTIVE: Currently available hand prostheses lack sensory feedback. A "phantom hand map", a referred sensation, on the skin of the residual arm is a possible target to provide amputees with non-invasive somatotopically matched sensory feedback. How-ever, not all amputees experience a phantom hand map. The aim of this study was to explore whether touch on predefined areas on the forearm can be associated with specific fingers.

DESIGN: A longitudinal cohort study.

SUBJECTS: A total of 31 able-bodied individuals.

METHODS: A "tactile display" was developed consisting of 5 servo motors, which provided the user with mechanotactile stimulus. Predefined pressure points on the volar aspect of the forearm were stimulated during a 2-week structured training period.

RESULTS: Agreement between the stimulated areas and the subjects' ability to discriminate the stimulation was high, with a distinct improvement up to the third training occasion, after which the kappa score stabilized for the rest of the period.

CONCLUSION: It is possible to associate touch on intact skin on the forearm with specific fingers after a structured training period, and the effect persisted after 2 weeks. These results may be of importance for the development of non-invasive sensory feedback systems in hand prostheses.

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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Rehabilitation Medicine
volume
51
issue
3
pages
209 - 216
publisher
Taylor & Francis
external identifiers
  • scopus:85062855366
ISSN
1651-2081
DOI
10.2340/16501977-2518
language
English
LU publication?
yes
id
0fa8dfd3-9a91-4929-b571-5d380b7aa5b7
date added to LUP
2019-03-04 15:19:51
date last changed
2019-03-24 04:53:07
@article{0fa8dfd3-9a91-4929-b571-5d380b7aa5b7,
  abstract     = {<p>OBJECTIVE: Currently available hand prostheses lack sensory feedback. A "phantom hand map", a referred sensation, on the skin of the residual arm is a possible target to provide amputees with non-invasive somatotopically matched sensory feedback. How-ever, not all amputees experience a phantom hand map. The aim of this study was to explore whether touch on predefined areas on the forearm can be associated with specific fingers.</p><p>DESIGN: A longitudinal cohort study.</p><p>SUBJECTS: A total of 31 able-bodied individuals.</p><p>METHODS: A "tactile display" was developed consisting of 5 servo motors, which provided the user with mechanotactile stimulus. Predefined pressure points on the volar aspect of the forearm were stimulated during a 2-week structured training period.</p><p>RESULTS: Agreement between the stimulated areas and the subjects' ability to discriminate the stimulation was high, with a distinct improvement up to the third training occasion, after which the kappa score stabilized for the rest of the period.</p><p>CONCLUSION: It is possible to associate touch on intact skin on the forearm with specific fingers after a structured training period, and the effect persisted after 2 weeks. These results may be of importance for the development of non-invasive sensory feedback systems in hand prostheses.</p>},
  author       = {Wijk, Ulrika and Svensson, Pamela and Antfolk, Christian and Carlsson, Ingela K and Björkman, Anders and Rosén, Birgitta},
  issn         = {1651-2081},
  language     = {eng},
  month        = {02},
  number       = {3},
  pages        = {209--216},
  publisher    = {Taylor & Francis},
  series       = {Journal of Rehabilitation Medicine},
  title        = {Touch on predefined areas on the forearm can be associated with specific fingers : Towards a new principle for sensory feedback in hand prostheses},
  url          = {http://dx.doi.org/10.2340/16501977-2518},
  volume       = {51},
  year         = {2019},
}