Document Detail

Velocity-dependent changes in the relative motion of the subsynovial connective tissue in the human carpal tunnel.
MedLine Citation:
PMID:  20607819     Owner:  NLM     Status:  MEDLINE    
The purpose of this study was to measure the rate-dependent changes in the relative motion of subsynovial connective tissue (SSCT) and median nerve in the human carpal tunnel. Using fluoroscopy, we measured the relative motion of middle finger flexor digitorum superficialis tendon, SSCT, and median nerve in eight human cadavers during simulated active finger flexion motions at 2.0, 5.0, 7.5, and 10.0 mm/s. The shear index was defined as the difference in motion between tendon and SSCT or tendon and nerve, expressed as a percentage of tendon excursion. The motion patterns of the SSCT and median nerve relative to tendon excursion were measured at each 10% increment (decile) of maximum tendon excursion. The tendon-SSCT shear index was significantly higher at 10.0 mm/s than at 2.0 mm/s in the single-digit motion. There were corresponding significant decreases in SSCT and median nerve motion for the 10.0 mm/s velocity compared to the 2.0 mm/s velocity. This study demonstrates that the relative motion of the tissues in the carpal tunnel appears to be dependent on tendon velocity, specifically with less nerve and SSCT motion at higher velocity tendon motion. This suggests that SSCT may be predisposed to shear injury from high-velocity tendon motion.
Yuichi Yoshii; Chunfeng Zhao; Jacqueline Henderson; Kristin D Zhao; Kai-Nan An; Peter C Amadio
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Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Journal of orthopaedic research : official publication of the Orthopaedic Research Society     Volume:  29     ISSN:  1554-527X     ISO Abbreviation:  J. Orthop. Res.     Publication Date:  2011 Jan 
Date Detail:
Created Date:  2010-11-24     Completed Date:  2011-01-11     Revised Date:  2013-05-29    
Medline Journal Info:
Nlm Unique ID:  8404726     Medline TA:  J Orthop Res     Country:  United States    
Other Details:
Languages:  eng     Pagination:  62-6     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Orthopaedic Research Society.
Orthopedic Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic, 200 First Street South West, Rochester, Minnesota 55905, USA.
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MeSH Terms
Aged, 80 and over
Carpal Tunnel Syndrome / physiopathology*
Connective Tissue / physiopathology*
Synovial Membrane / physiopathology*
Grant Support
AR49823/AR/NIAMS NIH HHS; R01 AR044391-14/AR/NIAMS NIH HHS; R01 AR049823-04/AR/NIAMS NIH HHS; R01 AR049823-09/AR/NIAMS NIH HHS

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