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Related Experiment Videos

Resonance frequency in patellar tendon.

T-G Wang1, T-Y Hsiao, C-L Wang

  • 1Department of Physical Medicine and Rehabilitation, National Taiwan University Hospital, College of Medicine, National Taiwan University, Taipei, Taiwan.

Scandinavian Journal of Medicine & Science in Sports
|February 24, 2007
PubMed
Summary
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This study measured the resonance frequency of the patellar tendon, confirming its existence in human soft tissues. This finding may help detect changes in soft tissue physical properties.

Area of Science:

  • Biomechanics
  • Biomedical Engineering
  • Human Physiology

Background:

  • Soft tissues possess unique physical properties that influence their mechanical behavior.
  • Understanding tissue resonance frequencies can provide insights into their structural integrity.
  • Previous research has not extensively explored resonance frequencies in specific human tendons.

Purpose of the Study:

  • To measure the resonance frequency of the patellar tendon.
  • To determine if resonance frequencies exist in human soft tissues.
  • To investigate the influence of knee flexion on patellar tendon resonance frequency.

Main Methods:

  • Vibrator attached to the tibia to induce vibrations.
  • Accelerometer attached to the patellar tendon to measure response.

Related Experiment Videos

  • Measurements taken at 0, 60, and 90 degrees of knee flexion in 10 healthy subjects.

    • Main Results:

    • Mean resonance frequencies of 22.5, 23.0, and 24.0 Hz were recorded at 0, 60, and 90 degrees of knee flexion, respectively.
    • A statistically significant increase in resonance frequency was observed between 60 and 90 degrees of knee flexion (P<0.05).
    • No significant differences were found between the left and right patellar tendons.

    Conclusions:

    • Resonance frequencies are demonstrable in human soft tissues, specifically the patellar tendon.
    • Knee flexion angle influences patellar tendon resonance frequency, with significant changes at higher flexion angles.
    • Patellar tendon resonance frequency measurement shows potential for assessing soft tissue physical properties and detecting alterations.