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Related Concept Videos

Sensation01:21

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Sensory receptors are specialized neurons that respond to specific types of external stimuli, initiating the process known as sensation. This occurs when sensory input, such as light entering the eye, is detected by these receptors, causing chemical changes in the cells of the retina. These cells then convert the sensory stimulus into action potentials that are transmitted to the central nervous system, a process termed transduction.
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Neuro-rehabilitation Approach for Sudden Sensorineural Hearing Loss
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Current perception threshold and the HAVS Stockholm sensorineural scale.

Ron House1, Kristine Krajnak, Michael Manno

  • 1Division of Occupational and Environmental Health, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada. houser@smh@toronto.on.ca

Occupational Medicine (Oxford, England)
|May 23, 2009
PubMed
Summary

Current perception threshold (CPT) testing can detect neurological damage from hand-arm vibration syndrome (HAVS) above baseline. However, CPT and nerve conduction tests do not reliably differentiate between higher stages of HAVS.

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Area of Science:

  • Occupational Health
  • Neurology
  • Biomedical Engineering

Background:

  • Hand-arm vibration syndrome (HAVS) is a significant occupational health concern.
  • Identifying reliable tests for neurological damage from vibration exposure is crucial.

Purpose of the Study:

  • To evaluate the association between the Stockholm sensorineural scale for HAVS and peripheral neurological function tests.
  • Specifically, to assess current perception threshold (CPT) and nerve conduction measurements in relation to HAVS severity.

Main Methods:

  • 155 male subjects with potential HAVS exposure were assessed.
  • Methods included medical/occupational history, physical examination for Stockholm stage, CPT testing (5, 250, 2000 Hz) on median and ulnar nerves, and blinded nerve conduction studies.

Main Results:

  • CPT was significantly elevated in HAVS Stages 1 and ≥2 compared to Stage 0 across all tested frequencies and nerves (P < 0.001).
  • CPT did not effectively differentiate between HAVS Stages 1 and ≥2.
  • Nerve conduction studies showed no association with Stockholm scale stages.

Conclusions:

  • Nerve conduction measurements did not correlate with the severity of HAVS as defined by the Stockholm scale.
  • While CPT indicated neurological dysfunction above Stage 0, it lacked the precision to distinguish between higher stages of the condition.