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Different tool training induces specific effects on body metric representation.

Daniele Romano1,2, Elena Uberti1,3, Pietro Caggiano3

  • 1Department of Psychology, University of Milano Bicocca, Piazza Ateneo Nuovo 1, Milan, 20126, Italy.

Experimental Brain Research
|November 22, 2018
PubMed
Summary

Tool use changes body representation. Specific actions, like using the shoulder or wrist, alter arm perception differently, influencing tool embodiment beyond just tool shape.

Keywords:
Arm bisection taskBody representationBody schemaEmbodimentTool use

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Motor Control

Background:

  • Tool use is known to induce neuroplasticity, affecting body representation.
  • The specific impact of different actions during tool use on body representation remains under-explored.

Purpose of the Study:

  • To investigate how different motor actions during tool use training affect body representation.
  • To determine if the morphology or the action itself is more critical for tool embodiment.

Main Methods:

  • Utilized the arm bisection task to measure changes in perceived arm midpoint.
  • Trained participants using actions focused on proximal (shoulder) or distal (wrist) body parts with and without tools.

Main Results:

  • Training with proximal or distal actions induced distinct shifts in perceived arm midpoint.
  • The observed effects were independent of tool use but enhanced by it.
  • Task-specific demands also influenced the changes in body representation.

Conclusions:

  • Specific motor patterns, not just tool morphology, significantly alter body representation.
  • Tool embodiment should consider the action-based demands of tool use, not solely the tool's physical characteristics.