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Interference between competing motor memories developed through learning with different limbs.

Neeraj Kumar1, Adarsh Kumar2, Bhoomika Sonane1

  • 1Centre for Cognitive Science, Indian Institute of Technology Gandhinagar, Gujarat, India.

Journal of Neurophysiology
|May 24, 2018
PubMed
Summary
This summary is machine-generated.

Motor learning across different limbs interferes, suggesting shared neural resources. Practicing with both arms consecutively may hinder new motor memory stabilization, impacting sports and rehabilitation.

Keywords:
generalizationinterlimb transfermotor learningretrograde interferencevisuomotor adaptation

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Area of Science:

  • Neuroscience
  • Motor Control
  • Cognitive Psychology

Background:

  • Learning from motor errors is crucial for tasks like tool use and rehabilitation.
  • Understanding how the brain integrates error signals across different limbs is key.

Purpose of the Study:

  • To investigate potential interference between motor memories learned with separate arms.
  • To explore the neural basis of cross-limb error-driven learning.

Main Methods:

  • Participants adapted to opposing visuomotor rotations with each arm.
  • Relearning of one mapping was tested after a delay to assess interference.
  • Order of arm practice was manipulated to examine asymmetric transfer.

Main Results:

  • Robust retrograde interference was observed between motor memories learned with different arms.
  • Learning was asymmetric, with greater interference when the left arm learned second.
  • Interference was retrograde, suggesting shared neural resources for motor memory formation.

Conclusions:

  • Motor learning with different limbs relies on common neural resources.
  • Consecutive practice with two arms may impede motor memory consolidation.
  • Findings have implications for optimizing training and rehabilitation strategies.