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Normative vibrotactile thresholds measured at five European test centres
Christopher J Lindsell1, Michael J Griffin
1Human Factors Research Unit, Institute of Sound and Vibration Research, University of Southampton, UK.
Summary
Vibrotactile thresholds can be reliably compared across international centers using standardized methods. Age significantly impacts 125 Hz thresholds, necessitating age-correction for accurate diagnosis of sensory neuropathy.
Area of Science:
- Neuroscience
- Sensory Physiology
- Biomedical Engineering
Background:
- Vibrotactile thresholds are crucial for assessing peripheral nerve function.
- Variability in measurement methods can hinder cross-center comparisons and clinical utility.
Purpose of the Study:
- To standardize vibrotactile threshold measurements across five international centers.
- To identify factors contributing to measurement variability.
- To establish normative data for diagnosing peripheral neuropathy.
Main Methods:
- Measured vibrotactile thresholds at 31.5 Hz and 125 Hz in 1,008 subjects.
- Employed standardized up-and-down methods with specific stimulus parameters (e.g., 3 dB/s rate, 2 N push force, 1 N probe force, 6 mm probe diameter).
- Compared data from centers using different methodologies.
Main Results:
- Thresholds were similar across centers using comparable measurement methods.
- Small differences (<5 dB) observed between genders, worker types, and fingers.
- Thresholds increased with age, with a notable 10 dB increase over 25 years for 125 Hz.
Conclusions:
- Standardized measurement protocols ensure cross-center comparability of vibrotactile thresholds.
- Age-specific corrections, particularly for 125 Hz, are recommended for clinical use.
- Normative data aids in diagnosing peripheral neuropathy affecting vibrotactile sensation.