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Single limb performance following contralateral bimanual limb training.

Jamie Kaye Burgess1, Rachel Bareither, James L Patton

  • 1Northwestern University, Evanston, IL 60208, USA. j-hitchens@northwestern.edu

IEEE Transactions on Neural Systems and Rehabilitation Engineering : a Publication of the IEEE Engineering in Medicine and Biology Society
|September 27, 2007
PubMed
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Bimanual training offered little skill transfer to the dominant hand, similar to intermanual training. This suggests limbs must individually experience dynamics to build internal models for movement learning.

Area of Science:

  • Motor control
  • Neuroscience
  • Biomechanics

Background:

  • Intermanual transfer of reaching movements suggests an
  • extrinsic
  • coordinate system is used.
  • Bimanual training may enhance skill transfer due to movement representation invariance.

Purpose of the Study:

  • Compare intermanual transfer and bimanual transfer of reaching skills.
  • Evaluate the efficacy of bimanual training for motor skill acquisition.
  • Investigate implications for rehabilitation in hemiparesis.

Main Methods:

  • Healthy subjects performed reaching tasks with intermanual and bimanual transfer.
  • Skill transfer was assessed via performance in force fields and "catch trials" (after-effects).

Related Experiment Videos

  • Movement accuracy and after-effects direction were analyzed.

    • Main Results:

    • Both intermanual and bimanual training yielded minimal skill transfer (approx. 20%).
    • No significant difference in movement accuracy was observed between the two training methods.
    • After-effects direction supported extrinsic coordinate system generalization.

    Conclusions:

    • Individual limb experience of dynamics is crucial for internal model development.
    • Bimanual training does not significantly enhance motor skill transfer compared to intermanual training.
    • Nervous system generalizes movements in an extrinsic frame, irrespective of training method.