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Manipulating response set in a choice reaction task: evidence for anatomical coding in response selection.

Jos J Adam1

  • 1Department of Movement Sciences, Maastricht University, P.O. Box 616, 6200 MD Maastricht, The Netherlands. jos.adam@bw.unimaas.nl

Acta Psychologica
|October 10, 2007
PubMed
Summary

Response selection in motor control is influenced by anatomical finger codes, not just spatial locations. Homologous fingers on different hands showed mirror-symmetrical effects, suggesting anatomy plays a key role.

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Area of Science:

  • Cognitive Neuroscience
  • Motor Control
  • Human Factors

Background:

  • Response selection theories typically emphasize spatial codes.
  • The role of anatomical effector codes in response selection is often overlooked.

Purpose of the Study:

  • To investigate the influence of anatomical finger identities on response selection.
  • To determine if effector anatomy impacts reaction time and error patterns.

Main Methods:

  • A four-choice reaction task was employed.
  • Anatomical identities of response fingers were systematically manipulated.
  • Stimulus and response locations were kept constant.

Main Results:

  • Homologous fingers on different hands produced mirror-symmetrical modulations in reaction time.

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  • Error patterns also exhibited mirror-symmetrical effects based on finger homology.
  • These findings challenge the purely spatial view of response selection.

    • Conclusions:

    • Anatomical factors significantly influence the response selection process.
    • Motor control systems may integrate both spatial and anatomical information.
    • Future research should consider the role of effector anatomy in motor performance.