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Related Experiment Videos

A method of measuring finger force with the Kin-Com dynamometer.

I Kondo1, M Fukuda, M Souma

  • 1Department of Rehabilitation Medicine, Institute of Brain Science, Hirosaki University, Japan.

Journal of Hand Therapy : Official Journal of the American Society of Hand Therapists
|January 6, 2000
PubMed
Summary

A new Kin-Com dynamometer attachment effectively measures finger force. This system shows good reproducibility for index finger force and some finger movements, suggesting feasibility for clinical use.

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Area of Science:

  • Biomechanics
  • Human Movement Science
  • Rehabilitation Engineering

Background:

  • Accurate measurement of finger force is crucial for assessing hand function and guiding rehabilitation.
  • Existing methods may have limitations in precision or accessibility.
  • Developing novel, reliable tools for force measurement is an ongoing need in clinical practice.

Purpose of the Study:

  • To evaluate the feasibility of measuring finger force using a new Kin-Com dynamometer attachment.
  • To determine the reproducibility of finger force measurements obtained with this novel system.
  • To assess the system's performance across different fingers and types of muscle contraction (concentric and eccentric).

Main Methods:

  • Eleven healthy adult males participated in the study.

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  • Finger forces for the index and little fingers were measured during concentric and eccentric movements.
  • A new attachment for the Kin-Com dynamometer was utilized for data acquisition.
  • Overall Coefficients of Variation (OCVs) were calculated to assess measurement reproducibility.

    • Main Results:

    • The new system demonstrated good reproducibility (OCV < 20%) for mean index finger force (10.7%).
    • Reproducibility was also good for eccentric motion of the little finger (14.0%).
    • The OCV for concentric motion of the little finger exceeded the 20% threshold, indicating lower reproducibility for this specific condition.

    Conclusions:

    • Measurement of finger force using the new Kin-Com attachment is feasible.
    • The system shows promising reproducibility for key parameters, particularly index finger force.
    • Further refinement may be needed to optimize reproducibility for all tested conditions, such as concentric little finger motion.