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Laterality differences for speed but not for control in sequential finger tapping.

L Z Podbros1, M A Wyke

  • 1Department of Rehabilitation Medicine, Tufts University School of Medicine, Boston, MA 02111.

Perceptual and Motor Skills
|December 1, 1988
PubMed
Summary
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The dominant right hand shows faster finger tapping speed than the left hand, with or without vision. However, both hands demonstrate equal motor control in sequential tasks, suggesting similar cerebral function beyond speed.

Area of Science:

  • Neuroscience
  • Motor Control
  • Human Movement Analysis

Background:

  • Sequential finger tapping is a common task to assess motor skills.
  • The dominant hand typically exhibits faster movement speeds.
  • The role of vision in fine motor control and inter-manual differences requires further investigation.

Purpose of the Study:

  • To compare the speed and control of sequential finger tapping between the dominant right and non-dominant left hands.
  • To investigate the influence of vision on inter-manual differences in motor performance.
  • To explore hemispheric lateralization in motor sequencing and control.

Main Methods:

  • 36 right-handed adults performed a sequential finger-tapping task on a block.
  • Performance was assessed with and without visual feedback.

Related Experiment Videos

  • Key metrics included tapping rate and block displacement (control).

    • Main Results:

    • The right hand was significantly faster than the left hand for sequential tapping, irrespective of vision.
    • Both hands showed improved steadiness (reduced block movement) with vision compared to without.
    • No significant differences in motor control (steadiness) were found between the right and left hands.

    Conclusions:

    • The findings support the hypothesis of left hemisphere dominance for rapid sequential motor tasks.
    • Motor control, excluding speed, appears to be equivalent between hands for sequential sequencing.
    • Vision enhances motor control for both hands, but does not alter inter-manual differences in control.