Abstract
Three methods are compared for assessing impaired tactile sensation in vibration-exposed workers: a medical examination including traditional neurological tests, and refined measures of vibrotactile and gap perception. Of 28 subjects, 21 were judged free of confounding factors (13 forestry workers exposed to chain saw vibration, aged 28 years ± 4 s.d., and 8 laboratory workers not exposed to vibration, for comparison, aged 34 ± 3 years). The measurements of vibrotactile perception were performed over a wide frequency range (2–400 Hz) to permit separate assessment of the three different types of mechanoreceptors—Pacinian corpuscles, Meissner corpuscles, and Merkel disks. The gap perception was measured with a newly improved aesthesiometer. Preliminary analysis of the results indicates that measurements of vibrotactile perception particularly can detect sensory changes in the fingers not consistently found by conventional clinical tests.
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