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Related Experiment Videos

Segmental nerve conduction velocity in vibration-exposed shipyard workers.

M Cherniack1, A J Brammer, R Lundstrom

  • 1Ergonomics Technology Center, University of Connecticut Health Center, 263 Farmington Avenue-MC6210, Farmington, Connecticut 06030-6210, USA. cherniack@nso.uchc.edu

International Archives of Occupational and Environmental Health
|February 27, 2004
PubMed
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Segmental sensory nerve conduction velocity (SNCV) in shipyard workers exposed to vibration showed slower speeds in digital segments, suggesting a link to occupational exposure. This study adapted laboratory methods for field use to assess nerve function in exposed workers.

Area of Science:

  • Occupational health
  • Neurophysiology
  • Biomedical engineering

Background:

  • Industrial use of vibratory tools can lead to peripheral nerve damage.
  • Assessing nerve conduction velocity (NCV) is crucial for diagnosing and understanding nerve injuries.
  • Segmental NCV measurements offer a more detailed assessment than standard wrist-digit tests.

Purpose of the Study:

  • To measure segmental sensory nerve conduction velocity (SNCV) in vibration-exposed shipyard workers.
  • To determine if SNCV is selectively slowed in the fingers.
  • To evaluate the feasibility of adapting laboratory NCV methods for field use.

Main Methods:

  • Segmental SNCV was measured from wrist to hand and digits in shipyard workers using vibratory tools.
  • Stimulation at the wrist with distal recording electrodes adjusted to individual anatomy.

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  • Three segments were analyzed: wrist-palm, palm-proximal digit, and digital segments.

    • Main Results:

    • SNCV was slower in wrist-palm and digital segments compared to palm-proximal digit segments for both median and ulnar nerves.
    • In dominant-hand median nerves of exposed workers, wrist-palm SNCV was 41.4 m/s and digital SNCV was 42.1 m/s.
    • Skin temperature significantly affected SNCV, with varying impacts across different nerve segments.

    Conclusions:

    • Reduced digital SNCV may result from occupational exposure to industrial vibration.
    • Each sensory nerve segment exhibits distinct velocity characteristics and temperature associations.
    • Differences in median and ulnar nerve segments have implications for standard wrist-digit velocity assessments.