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Imagined paralysis alters somatosensory evoked-potentials.
Journal article

Imagined paralysis alters somatosensory evoked-potentials.

  • Palluel E Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Swiss Federal Institute of Technology (EPFL) , Geneva, Switzerland.
  • Falconer CJ Department of Psychology, University of Bern , Bern, Switzerland.
  • Lopez C Aix Marseille University, CNRS, LNSC, FR3C , Marseille, France.
  • Marchesotti S Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Swiss Federal Institute of Technology (EPFL) , Geneva, Switzerland.
  • Hartmann M Department of Psychology, University of Bern , Bern, Switzerland.
  • Blanke O Laboratory of Cognitive Neuroscience, Center for Neuroprosthetics and Brain Mind Institute, Swiss Federal Institute of Technology (EPFL) , Geneva, Switzerland.
  • Mast FW Department of Psychology, University of Bern , Bern, Switzerland.
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  • 2020-07-15
Published in:
  • Cognitive neuroscience. - 2020
Imagined paralysis
body representation
imagery
somatosensory-evoked potentials
English Recent studies employing body illusions have shown that multisensory conflict can alter body representations and modulate low-level sensory processing. One defining feature of these body illusions is that they are sensory driven and thus passive on behalf of the participant. Thus, it remained to establish whether explicit alteration of own-body representations modulates low-level sensory processing. We investigated whether tibial nerve somatosensory-evoked potentials were modulated when participants imagined paralysis of their legs and arms. Imagined paralysis of the legs decreased P40 amplitude, but not imagined paralysis of the arms. These results show modulation of early somatosensory processing via explicit, top-down alteration to the internal representation of the body. Interestingly, P40 suppression positively correlated with bodily awareness scores whereas it negatively correlated with body dissociation scores. This suggests that the ability to actively alter own-body representation and its corresponding sensory processing depends upon dispositions to attend to and focus on bodily sensations.
Language
  • English
Open access status
closed
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Persistent URL
https://sonar.ch/global/documents/206191
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