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Normal nerve conduction velocity and vibrotactile perception thresholds in computer users.

Journal article
Authors Helena Sandén
Micael Edblom
Anna Ekman
Artur Tenenbaum
Gunnar B Wallin
Mats Hagberg
Published in International archives of occupational and environmental health
Volume 78
Issue 3
Pages 239-42
ISSN 0340-0131
Publication year 2005
Published at Institute of Clinical Neurosciences
Institute of Internal Medicine, Dept of Medicine
Pages 239-42
Language en
Keywords Adult, Aged, Computers, Female, Humans, Median Nerve, physiopathology, Middle Aged, Neural Conduction, Occupational Diseases, epidemiology, physiopathology, Questionnaires, Sweden, epidemiology, Touch, Ulnar Nerve, physiopathology, Vibration
Subject categories Medical and Health Sciences


OBJECTIVES: A literature report described significantly raised vibration threshold within the territory of the median nerve in a group of office workers and concluded that the results indicated a change in the function of large sensory fibres. The aim of the present cross-sectional study was to compare vibrotactile perception thresholds and nerve conduction measurements in the upper extremity between female computer users (secretaries) and female non-users (nurses). METHODS: Eighty-two secretaries, aged 25-65 (median 44) years and 35 nurses, aged 24-57 (median 46) years went through nerve conduction measurements on the dominant hand and also a vibration threshold test with readings over the hand at five sites which tested cutaneous innervation of the median, ulnar, and radial nerves. RESULTS: There was no significant difference in any parameter of the nerve conduction testing and there was no significant difference in any parameter of the vibration threshold test between secretaries and nurses. The numerical differences between groups were small and in both directions and thus do not indicate a power problem. CONCLUSIONS: We saw no signs of early neural deficits of large sensory fibres in subjects who intensively use computer keyboard equipment.

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