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Effect of grip type, wrist motion, and resistance level on pressures within the carpal tunnel of normal wrists
Author(s) -
McGorry Raymond W.,
Fallentin Nils,
Andersen Johan H.,
Keir Peter J.,
Hansen Torben B.,
Pransky Glenn,
Lin JiaHua
Publication year - 2014
Publication title -
journal of orthopaedic research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.041
H-Index - 155
eISSN - 1554-527X
pISSN - 0736-0266
DOI - 10.1002/jor.22571
Subject(s) - wrist , carpal tunnel syndrome , ulnar deviation , medicine , displacement (psychology) , grip strength , physical medicine and rehabilitation , range of motion , motion (physics) , orthodontics , carpal tunnel , resistance training , anatomy , physical therapy , surgery , psychology , computer science , artificial intelligence , psychotherapist
Elevated carpal tunnel pressure (CTP) has been associated with carpal tunnel syndrome. This study systematically evaluated the effect of wrist motion resistance and grip type on CTP during wrist motion typical of occupational tasks. CTP during four wrist motion patterns, with and without resistance, and with and without gripping, was measured in vivo in 14 healthy individuals. CTP measured during compound motions fell between that measured in the cardinal planes of wrist flexion/extension and radial/ulnar deviation. Generally, with no active gripping there was little pressure change due to wrist angular displacement or resistance level. However, concurrent active pinch or power grip increased CTP particularly in motions including extension. CTP typically did not increase during wrist flexion, and in fact often decreased. Extension motions against resistance when employing a pinch or power grip increase CTP more than motions with flexion. Results could help inform design or modification of wrist motion intensive occupational tasks. © 2014 The Authors. © 2013 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 32:524–530, 2014.