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Related Experiment Video

Updated: Apr 1, 2026

Force and Position Control in Humans - The Role of Augmented Feedback
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ADJUSTMENT ERRORS IN ASCENDING AND DESCENDING PHASES OF TARGET LEVEL IN CONTROLLED FORCE EXERTION.

Hiroshi Kubota1, Shinichi Demura2

  • 11 Gifu University.

Perceptual and Motor Skills
|October 8, 2015
PubMed
Summary

Men showed fewer hand grip force adjustment errors during ascending force phases and with their dominant hand. Laterality significantly impacts force exertion accuracy in controlled force exertion tests.

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Area of Science:

  • Biomechanics
  • Motor Control
  • Human Performance

Background:

  • Accurate force production is crucial for various motor tasks.
  • Understanding force adjustment errors and the influence of laterality is important for human performance.
  • Controlled Force Exertion (CFE) tests provide a standardized method to assess force control.

Purpose of the Study:

  • To measure hand grip force adjustment errors during ascending and descending phases of a sinusoidal target force.
  • To evaluate the influence of hand laterality (dominant vs. non-dominant) on these force exertion errors.
  • To analyze differences in CFE errors between force increase and decrease phases.

Main Methods:

  • 75 men performed a CFE test, matching handgrip force to target levels (5-25% of maximal grip force).
  • Force adjustment errors were calculated as absolute differences between actual and target force in ascending and descending phases.
  • Laterality effects were analyzed by comparing dominant and non-dominant hand performance.

Main Results:

  • Significantly smaller CFE errors were observed in the ascending phase compared to the descending phase for both hands.
  • The dominant hand exhibited significantly smaller CFE errors in both ascending and descending phases.
  • Both phase direction and hand laterality significantly influenced force exertion errors.

Conclusions:

  • Force exertion accuracy differs between ascending and descending phases of target force.
  • Hand laterality plays a significant role in modulating force control accuracy.
  • Findings have implications for understanding motor control and developing targeted interventions for force production deficits.