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Prosthesis embodiment and attenuation of prosthetic touch in upper limb amputees : A proof-of-concept study

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2021

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Fritsch, Antonia
Bekrater-Bodmann, Robin

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Consciousness and Cognition. Elsevier. 2021, 88, 103073. ISSN 1053-8100. eISSN 1090-2376. Available under: doi: 10.1016/j.concog.2020.103073

Zusammenfassung

Sensory attenuation of self-touch, that is, the perceptual reduction of self-generated tactile stimuli, is considered a neurocognitive basis for self-other distinction. However, whether this effect can also be found in upper limb amputees using a prosthesis is unknown. Thirteen participants were asked to touch their foot sole with a) their intact hand (self-touch), b) their prosthesis (prosthesis-touch), or c) let it be touched by another person (other-touch). Intensity of touch was assessed with a questionnaire. In addition, prosthesis embodiment was assessed in nine participants. Self-touch as well as prosthesis-touch was characterized by significant perceptual attenuation compared to other-touch, while self- and prosthesis-touch did not differ. The more embodied the prosthesis was, the more similar was its elicited touch perception to actual self-touch. These findings - although preliminary - suggest that perceptually embodied prostheses can be represented as an actual limb by the users' sensorimotor system.

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150 Psychologie

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Embodiment, Forward model, Prosthesis, Self-touch, Sensory attenuation

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ISO 690FRITSCH, Antonia, Bigna LENGGENHAGER, Robin BEKRATER-BODMANN, 2021. Prosthesis embodiment and attenuation of prosthetic touch in upper limb amputees : A proof-of-concept study. In: Consciousness and Cognition. Elsevier. 2021, 88, 103073. ISSN 1053-8100. eISSN 1090-2376. Available under: doi: 10.1016/j.concog.2020.103073
BibTex
@article{Fritsch2021Prost-56847,
  year={2021},
  doi={10.1016/j.concog.2020.103073},
  title={Prosthesis embodiment and attenuation of prosthetic touch in upper limb amputees : A proof-of-concept study},
  volume={88},
  issn={1053-8100},
  journal={Consciousness and Cognition},
  author={Fritsch, Antonia and Lenggenhager, Bigna and Bekrater-Bodmann, Robin},
  note={Article Number: 103073}
}
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    <dcterms:abstract xml:lang="eng">Sensory attenuation of self-touch, that is, the perceptual reduction of self-generated tactile stimuli, is considered a neurocognitive basis for self-other distinction. However, whether this effect can also be found in upper limb amputees using a prosthesis is unknown. Thirteen participants were asked to touch their foot sole with a) their intact hand (self-touch), b) their prosthesis (prosthesis-touch), or c) let it be touched by another person (other-touch). Intensity of touch was assessed with a questionnaire. In addition, prosthesis embodiment was assessed in nine participants. Self-touch as well as prosthesis-touch was characterized by significant perceptual attenuation compared to other-touch, while self- and prosthesis-touch did not differ. The more embodied the prosthesis was, the more similar was its elicited touch perception to actual self-touch. These findings - although preliminary - suggest that perceptually embodied prostheses can be represented as an actual limb by the users' sensorimotor system.</dcterms:abstract>
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