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  4. Restoring Natural Sensory Feedback in Real-Time Bidirectional Hand Prostheses
 
research article

Restoring Natural Sensory Feedback in Real-Time Bidirectional Hand Prostheses

Raspopovic, Stanisa  
•
Capogrosso, Marco  
•
Petrini, Francesco Maria  
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2014
Science Translational Medicine

Hand loss is a highly disabling event that markedly affects the quality of life. To achieve a close to natural replacement for the lost hand, the user should be provided with the rich sensations that we naturally perceive when grasping or manipulating an object. Ideal bidirectional hand prostheses should involve both a reliable decoding of the user's intentions and the delivery of nearly "natural" sensory feedback through remnant afferent pathways, simultaneously and in real time. However, current hand prostheses fail to achieve these requirements, particularly because they lack any sensory feedback. We show that by stimulating the median and ulnar nerve fascicles using transversal multichannel intrafascicular electrodes, according to the information provided by the artificial sensors from a hand prosthesis, physiologically appropriate (near-natural) sensory information can be provided to an amputee during the real-time decoding of different grasping tasks to control a dexterous hand prosthesis. This feedback enabled the participant to effectively modulate the grasping force of the prosthesis with no visual or auditory feedback. Three different force levels were distinguished and consistently used by the subject. The results also demonstrate that a high complexity of perception can be obtained, allowing the subject to identify the stiffness and shape of three different objects by exploiting different characteristics of the elicited sensations. This approach could improve the efficacy and "life-like" quality of hand prostheses, resulting in a keystone strategy for the near-natural replacement of missing hands.

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Type
research article
DOI
10.1126/scitranslmed.3006820
Web of Science ID

WOS:000331091100010

Author(s)
Raspopovic, Stanisa  
Capogrosso, Marco  
Petrini, Francesco Maria  
Bonizzato, Marco  
Rigosa, Jacopo  
Di Pino, Giovanni
Carpaneto, Jacopo
Controzzi, Marco
Boretius, Tim
Fernandez, Eduardo
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Date Issued

2014

Publisher

American Association for the Advancement of Science

Published in
Science Translational Medicine
Volume

6

Issue

222

Article Number

222ra19

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
TNE  
NCCR-ROBOTICS  
Available on Infoscience
April 2, 2014
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/102411
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