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Vibration perception thresholds in workers exposed to vibration.

H Virokannas1

  • 1Department of Public Health Science, University of Oulu, Finland.

International Archives of Occupational and Environmental Health
|January 1, 1992
PubMed
Summary
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Hand-arm vibration exposure increases vibration perception thresholds (VPT) in workers. This study found VPT is a useful measure for detecting vibration-induced sensory nerve damage, with high frequencies affected first.

Area of Science:

  • Occupational Health
  • Neuroscience
  • Biophysics

Background:

  • Hand-arm vibration (HAV) is a significant occupational hazard.
  • Assessing sensory nerve function is crucial for understanding HAV effects.
  • Vibration perception thresholds (VPT) measure sensory nerve response to vibration.

Purpose of the Study:

  • To investigate the relationship between hand-arm vibration exposure and VPT.
  • To determine if VPT can detect vibration-induced sensory nerve damage.
  • To explore factors influencing VPT, including carpal tunnel syndrome and alcohol consumption.

Main Methods:

  • VPT was measured at six frequencies (16-500 Hz) in 77 exposed workers and 77 controls.
  • A dose-response relationship between vibration exposure and VPT was analyzed.

Related Experiment Videos

  • Statistical analysis examined the influence of carpal tunnel syndrome and alcohol on VPT.

    • Main Results:

    • Age-adjusted VPTs were significantly higher in vibration-exposed workers compared to controls.
    • A dose-response relationship between vibration exposure and VPT was established.
    • Carpal tunnel syndrome and alcohol consumption were associated with increased VPT, while vibration-induced white finger was not.

    Conclusions:

    • Hand-arm vibration initially affects high-frequency perception, later spreading to low frequencies.
    • VPT testing is a valuable tool for assessing vibration-induced sensory nerve damage.
    • VPT characteristics align with known effects of vibration exposure on nerve function.