To investigate in patients with repetitive strain injury (RSI) and in office workers using computer keyboard equipment (a) whether the vibration threshold in the hand was altered, (b) the immediate effects of keyboard use on vibration thresholds and (c) whether the tolerance of suprathreshold vibration was normal.
A vibrametre (Somedic Ab, Stockholm Sweden) was used to obtain threshold vibration measurements, by the method of limits, for all peripheral-nerve cutaneous distributions in the hand.
Tolerance of suprathreshold stimulation was obtained by stimulation of the soft tissues of the forearm by increasing the amplitude of vibration.
Thresholds for vibration were significantly raised for the median nerve in both the patient and office-worker groups.
The patient group additionally had raised thresholds for the ulnar nerve.
Following use of the keyboard, thresholds for the median nerve were further elevated in the patient group, but not in the other groups, demonstrating a work-related exacerbation.
At suprathreshold stimulation, 14 members (82%) of the patient group experienced an allodynic response to vibration, indicating possible changes in the central processing of non-noxious sensory information.
This changed sensory response was not seen in either the office-worker or control groups.
Patients may have a minor polyneuropathy, whereas the office workers demonstrate early signs of the condition. (...)
Mots-clés Pascal : Employé bureau, Homme, Exposition professionnelle, Allodynie, Neuropathie périphérique, Seuil perception, Membre supérieur, Clavier, Ordinateur, Récidive, Vibration, Médecine travail, Système nerveux pathologie, Nerf périphérique pathologie
Mots-clés Pascal anglais : Clerical personnel, Human, Occupational exposure, Allodynia, Peripheral neuropathy, Perception threshold, Upper limb, Keyboard, Computer, Relapse, Vibration, Occupational medicine, Nervous system diseases, Peripheral nerve disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0121752
Code Inist : 002A08E. Création : 22/06/1998.