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Optimal integration of intraneural somatosensory feedback with visual information: a single-case study.

  • Risso G Robotics, Brain and Cognitive Sciences (RBCS), Istituto Italiano di Tecnologia, Genoa, Italy.
  • Valle G Bertarelli Foundation Chair in Translational Neuroengineering, Centre for Neuroprosthetics and Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland. vallegiacomo@gmail.com.
  • Iberite F The Biorobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy.
  • Strauss I Bertarelli Foundation Chair in Translational Neuroengineering, Centre for Neuroprosthetics and Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Stieglitz T Laboratory for Biomedical Microtechnology, Department of Microsystems Engineering-IMTEK & Bernstein Center, University of Freiburg, Freiburg, D-79110, Germany.
  • Controzzi M The Biorobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy.
  • Clemente F The Biorobotics Institute, Scuola Superiore Sant'Anna, Pisa, Italy.
  • Granata G Institute of Neurology, Catholic University of The Sacred Heart, Policlinic A. Gemelli Foundation, Roma, Italy.
  • Rossini PM Institute of Neurology, Catholic University of The Sacred Heart, Policlinic A. Gemelli Foundation, Roma, Italy.
  • Micera S Bertarelli Foundation Chair in Translational Neuroengineering, Centre for Neuroprosthetics and Institute of Bioengineering, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
  • Baud-Bovy G Robotics, Brain and Cognitive Sciences (RBCS), Istituto Italiano di Tecnologia, Genoa, Italy. gabriel.baud-bovy@iit.it.
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  • 2019-05-29
Published in:
  • Scientific reports. - 2019
Amputees
Artificial Limbs
Brain-Computer Interfaces
Electric Stimulation
Electrodes, Implanted
Electromyography
Feedback, Sensory
Female
Forearm
Humans
Middle Aged
Single-Case Studies as Topic
Treatment Outcome
Ulnar Nerve
English Providing somatosensory feedback to amputees is a long-standing objective in prosthesis research. Recently, implantable neural interfaces have yielded promising results in this direction. There is now considerable evidence that the nervous system integrates redundant signals optimally, weighting each signal according to its reliability. One question of interest is whether artificial sensory feedback is combined with other sensory information in a natural manner. In this single-case study, we show that an amputee with a bidirectional prosthesis integrated artificial somatosensory feedback and blurred visual information in a statistically optimal fashion when estimating the size of a hand-held object. The patient controlled the opening and closing of the prosthetic hand through surface electromyography, and received intraneural stimulation proportional to the object's size in the ulnar nerve when closing the robotic hand on the object. The intraneural stimulation elicited a vibration sensation in the phantom hand that substituted the missing haptic feedback. This result indicates that sensory substitution based on intraneural feedback can be integrated with visual feedback and make way for a promising method to investigate multimodal integration processes.
Language
  • English
Open access status
gold
Identifiers
Persistent URL
https://sonar.ch/global/documents/189540
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