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Related Experiment Videos

Age and upper limb tension testing affects current perception thresholds.

Melissa Costantini1, Kari Tunks, Christine Wyatt

  • 1The University of Western Ontario, Ontario, Canada.

Journal of Hand Therapy : Official Journal of the American Society of Hand Therapists
|July 25, 2006
PubMed
Summary

Upper limb tension testing (ULTT) measurably affects nerve sensory thresholds, particularly in older individuals. Age influences current perception threshold (CPT) responses, with distinct effects at different frequencies.

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Area of Science:

  • Neuroscience
  • Biomedical Engineering
  • Clinical Neurology

Background:

  • Quantitative sensory testing is crucial for understanding peripheral nerve function.
  • Upper limb tension testing (ULTT) is commonly used to assess nerve involvement in upper limb disorders.
  • Age-related changes in nerve function can impact sensory perception.

Purpose of the Study:

  • To quantitatively assess the sensory response to ULTT using current perception threshold (CPT) testing.
  • To investigate the influence of age on CPT in response to ULTT.
  • To determine if ULTT effectively tensions specific nerves and how age affects this response.

Main Methods:

  • Fifty-nine healthy subjects underwent randomized CPT testing at 5 Hz and 2,000 Hz.
  • Testing was performed in a resting position and a median-nerve bias position using a Neurometer.

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  • Statistical analyses, including correlation and covariate analysis, were used to evaluate the data.

    • Main Results:

    • ULTT significantly impacted CPT in normal subjects, with a more pronounced effect on the ulnar nerve compared to the median nerve.
    • Age was a significant covariate for CPT at both 5 Hz and 2,000 Hz.
    • Age showed a weak but significant correlation with CPT, with trends towards hypoesthesia at 2,000 Hz and hyperesthesia at 5 Hz.

    Conclusions:

    • ULTT elicits measurable changes in peripheral nerve sensory thresholds.
    • These sensory changes are more pronounced with increasing age.
    • Further research is needed to explore the specificity of nerve bias induced by different ULTT protocols.