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Published on: September 18, 2017
Transfer of learning between the arms during bimanual reaching
Linda R Harley1, Boris I Prilutsky
1Georgia Tech Research Institute, Atlanta, GA 30332, USA. linda.harley@gtri.gatech.edu
Summary
Bimanual reaching enhances motor adaptation in the dominant arm but increases errors in the nondominant arm, suggesting learning transfer depends on arm dominance during viscous force-field tasks.
Area of Science:
- Neuroscience
- Motor Control
- Human Movement Science
Background:
- Motor adaptation is crucial for adjusting movements to altered dynamics.
- Bimanual coordination involves complex inter-limb interactions.
- Understanding inter-limb transfer during motor learning is key to rehabilitation.
Purpose of the Study:
- To investigate the influence of one arm's movement on the other's motor adaptation rate.
- To examine inter-limb learning transfer during bimanual reaching in a viscous force-field.
- To determine the role of arm dominance in bimanual motor adaptation.
Main Methods:
- Forty healthy adults performed unimanual and bimanual reaching tasks.
- A viscous force-field was applied to one arm during bimanual tasks.
- Motor adaptation rates and reaching errors were quantified for each arm.
Main Results:
- The dominant arm showed a faster rate of motor adaptation during bimanual tasks compared to unimanual tasks.
- The nondominant arm exhibited increased reaching errors during bimanual tasks versus unimanual tasks.
- Evidence of bidirectional learning transfer between arms was observed.
Conclusions:
- Bimanual interaction facilitates motor learning in the dominant arm.
- Motor learning transfer during bimanual tasks is asymmetric and influenced by arm dominance.
- Movement information transfer during bimanual reaching is modulated by the dominant/nondominant arm distinction.
