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Median nerve trauma in a rat model of work-related musculoskeletal disorder.

Authors
Clark-BD; Barr-AE; Safadi-FF; Beitman-L; Al-Shatti-T; Amin-M; Gaughan-JP; Barbe-MF
Source
J Neurotrauma 2003 Jul; 20(7):681-695
NIOSHTIC No.
20029156
Abstract
Anatomical and physiological changes were evaluated in the median nerves of rats trained to perform repetitive reaching. Motor degradation was evident after 4 weeks. ED1-immunoreactive macrophages were seen in the transcarpal region of the median nerve of both forelimbs by 5-6 weeks. Fibrosis, characterized by increased immunoexpression of collagen type I by 8 weeks and connective tissue growth factor by 12 weeks, was evident. The conduction velocity (NCV) within the carpal tunnel showed a modest but significant decline after 9-12 weeks. The lowest NCV values were found in animals that refused to participate in the task for the full time available. Thus, both anatomical and physiological signs of progressive tissue damage were present in this model. These results, together with other recent findings indicate that work-related carpal tunnel syndrome develops through mechanisms that include injury, inflammation, fibrosis and subsequent nerve compression.
Keywords
Nerve-damage; Nerves; Laboratory-animals; Animals; Animal-studies; Models; Musculoskeletal-system-disorders; Physiological-effects; Fibrosis; Nerve-tissue; Tissue-disorders; Carpal-tunnel-syndrome; Injuries; Occupational-health
CODEN
JNEUE4
Publication Date
20030701
Document Type
Journal Article
Funding Type
Grant
Fiscal Year
2003
NTIS Accession No.
NTIS Price
Identifying No.
Grant-Number-R01-OH-003970
Issue of Publication
7
ISSN
0897-7151
Source Name
Journal of Neurotrauma
State
PA
Performing Organization
Temple University
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