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Vibratory perception threshold in the lower extremities. Normative values

P Urban1, Z Jandak, E Lukas

  • 1Centre of Industrial Hygiene and Occupational Disease, National Institute of Public Health, Prague, Czech Republic.

Central European Journal of Public Health
|November 1, 1995
PubMed
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This study established normative vibratory perception threshold (VPT) values for lower extremities in healthy adults. Age was found to influence VPT, particularly in males, highlighting its importance in clinical assessments.

Area of Science:

  • Neurology
  • Biomedical Engineering
  • Physiology

Background:

  • Vibratory perception threshold (VPT) assessment is crucial for detecting peripheral neuropathy.
  • Establishing normative VPT values is essential for accurate clinical interpretation.
  • Understanding VPT's dependence on physiological factors aids in refining diagnostic criteria.

Purpose of the Study:

  • To determine normative vibratory perception threshold (VPT) values in the lower extremities of healthy individuals.
  • To investigate the relationship between VPT and physiological factors such as age and sex.
  • To develop a reference nomogram for VPT across various frequencies.

Main Methods:

  • VPT measurements were conducted on 30 healthy volunteers (10 men, 20 women) using a B&K vibration threshold meter (model 1800).

Related Experiment Videos

  • VPT was assessed at the external malleolus for frequencies including 8, 16, 31.5, 63, 125, 250, and 500 Hz.
  • The threshold tracking method was employed, with measurements repeated to ensure reliability.

    • Main Results:

    • Normative VPT values were established for each tested frequency, with a calculated global index reference value of 840 +/- 52 dB.
    • No significant differences in VPT were observed between the right and left lower extremities or between repeated measurements.
    • A trend of increasing VPT with age was noted, reaching statistical significance in males for several frequencies (16-125 Hz).

    Conclusions:

    • The study provides valuable normative data for vibratory perception thresholds in the lower extremities.
    • Age is a significant factor influencing VPT, particularly in males, necessitating age-adjusted reference ranges.
    • The developed nomogram and global index can serve as useful tools for clinical evaluation of vibratory sensation.