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Related Experiment Videos

Multiple concurrent visual-motor mappings: implications for models of adaptation

H A Cunningham1, R B Welch

  • 1Life Science Division, NASA-Ames Research Center, Moffett Field, California 94035-1000.

Journal of Experimental Psychology. Human Perception and Performance
|October 1, 1994
PubMed
Summary

The brain can manage multiple visual-motor mappings simultaneously, challenging previous theories. This study shows adaptation to new movement controls is possible with concurrent representations.

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Motor Control

Background:

  • Previous theories proposed the central nervous system (CNS) can only accurately represent one visual-motor mapping at a time.
  • Understanding adaptation to visual-motor rearrangement is crucial for human-computer interaction and rehabilitation.

Purpose of the Study:

  • To investigate the CNS's capacity for representing multiple concurrent visual-motor mappings.
  • To examine the effects of alternating between interfering mappings on adaptation and aftereffects.

Main Methods:

  • Three experiments involved subjects tracking a moving target under alternating visual-motor mappings.
  • A "normal" mapping (computer input) and a 108-degree rotated mapping were used.
  • Factors like color cues, interference, decay, and intermanual transfer were analyzed.
Keywords:
NASA Center ARCNASA Discipline Neuroscience

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Main Results:

  • Alternating between mappings significantly reduced errors under the rotated mapping.
  • The adaptation aftereffect typically seen when switching mappings was also significantly reduced.
  • Evidence suggests the CNS can maintain and switch between multiple visual-motor representations.

Conclusions:

  • The findings challenge the single-mapping hypothesis, indicating a capacity for multiple concurrent visual-motor mappings.
  • A parametric control process near the motor output stage may govern these multiple mappings.
  • This has implications for understanding motor learning and adaptability.