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Related Experiment Videos

Directional sensibility for quantification of tactile dysfunction

H Olausson1, U Norrsell, K Göthner

  • 1Department of Physiology, Göteborg University, Sweden.

Muscle & Nerve
|October 28, 1997
PubMed
Summary

This study developed a new test for tactile directional sensibility, assessing the ability to detect object motion on the skin. The test proved as effective as nerve conduction studies in identifying tactile nerve dysfunction in patients.

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Area of Science:

  • Neuroscience
  • Somatosensory research
  • Clinical neurology

Background:

  • Tactile directional sensibility is crucial for diagnosing somatosensory disorders.
  • Previous methods for assessing this ability lacked standardization and efficiency.
  • Advances in understanding physiological mechanisms prompted test refinement.

Purpose of the Study:

  • To develop and validate a semiquantitative test for tactile directional sensibility.
  • To establish normative values for healthy individuals.
  • To compare test sensitivity against electrophysiological measures in patients.

Main Methods:

  • A novel test was designed to semiquantify directional sensibility across six body areas.
  • Normal values were established using 40 healthy subjects.

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  • The test was administered to 20 patients with tactile symptoms, including those with confirmed nerve conduction abnormalities.

    • Main Results:

    • The developed test allowed for semiquantification of directional sensibility within 20 minutes.
    • Abnormal directional sensibility was observed in 10 patients with documented nerve conduction deficits.
    • The protocol demonstrated comparable sensitivity to electrophysiological measurements in detecting tactile nerve dysfunction.

    Conclusions:

    • The new protocol offers a sensitive, semiquantitative method for assessing tactile directional sensibility.
    • This test is a valuable tool for detecting tactile nerve dysfunction, complementing electrophysiological assessments.
    • The findings support the clinical utility of directional sensibility testing in neurological evaluations.