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Long- but not short-term tool-use changes hand representation.

Lara A Coelho1, Jason P Schacher2,3, Cory Scammel2,3

  • 1The Brain in Action Laboratory, Department of Kinesiology and Physical Education, University of Lethbridge, Lethbridge, AB, T1K 3M4, Canada. lara.coelho@uleth.ca.

Experimental Brain Research
|October 25, 2018
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Summary
This summary is machine-generated.

Long-term use of tools like baseball gloves alters body representation, shrinking perceived hand size even in untrained hands. Short-term glove use did not significantly change hand perception.

Keywords:
Body modelBody representationHandPlasticityTraining

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Area of Science:

  • Neuroscience
  • Human-Computer Interaction
  • Sports Science

Background:

  • Tool use can modify body representation, incorporating the tool into the body schema.
  • Previous research focused on tools extending reach, not encapsulating body parts.
  • The impact of long-term tool use on the body model remains underexplored.

Purpose of the Study:

  • To investigate the long-term effects of tool use on hand representation.
  • To explore the relationship between tool use and the body model.
  • To compare hand representation in elite baseball players (EBP) and controls.

Main Methods:

  • Recruited 19 elite baseball players (EBP) and 18 age-matched controls.
  • Participants performed a hand representation task, pointing to locations on their hands under a tabletop.
  • Perceived hand size was mapped using Optotrak camera tracking.

Main Results:

  • Elite baseball players underestimated hand width and finger length compared to controls.
  • This effect was observed in both trained and untrained hands of EBP.
  • A follow-up study showed no significant change in hand perception after 15 minutes of glove use in novices.

Conclusions:

  • Long-term, immersive tool use (baseball gloves) leads to significant alterations in the body model.
  • The body model adapts to long-term tool use, affecting both trained and untrained body parts.
  • Short-term tool use does not appear to induce similar changes in body representation.