Document Detail


A static dynamometer measuring simultaneous torques exerted at the upper limb.
MedLine Citation:
PMID:  9749908     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The majority of available dynamometers are designed to measure force or torque in one specific direction, one joint at a time. For the quantification of motor incoordination in neurological patient populations, these dynamometers provide limited information about the global behavior of the limb under investigation. This report describes the potential use and function of a static dynamometer measuring torques exerted simultaneously at the shoulder (flexion-extension, abduction-adduction, internal-external rotation), elbow (flexion-extension), and forearm (pronation-supination). Orthogonal forces were measured at the arm and wrist using strain gauge transducers interfaced with a laboratory computer. The lever arms were specified to a software program and the joint torques were calculated in real time according to static equilibrium equations. The use of the dynamometer is illustrated by characterizing for one hemiparetic subject, the joints torques recorded at the shoulder, elbow, and forearm during isolated submaximal grip exertions at different force levels on both sides. The torques generated at the shoulder, elbow and forearm during the hand grip tasks on the affected side were significantly higher than those obtained on the nonaffected side and increased with the grip force level. These differences probably reflect the loss of movement selectivity observed following a lesion in the central nervous system. Further studies are currently being undertaken in neurological patient populations to characterize and quantify motor deficits using this dynamometer. As a long term goal, we hope that the method and technologies described here will contribute to the evaluation and rehabilitation of these populations.
Authors:
P Boissy; D Bourbonnais; D Gravel; A B Arsenault; M Leblanc
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  IEEE transactions on rehabilitation engineering : a publication of the IEEE Engineering in Medicine and Biology Society     Volume:  6     ISSN:  1063-6528     ISO Abbreviation:  IEEE Trans Rehabil Eng     Publication Date:  1998 Sep 
Date Detail:
Created Date:  1998-12-01     Completed Date:  1998-12-01     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  9413994     Medline TA:  IEEE Trans Rehabil Eng     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  309-15     Citation Subset:  IM    
Affiliation:
Research Center, Montreal Rehabilitation Institute and the School of Rehabilitation, Faculty of Medicine, University of Montreal, P.Q., Canada.
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MeSH Terms
Descriptor/Qualifier:
Biofeedback, Psychology
Biomechanics
Elbow Joint / physiology*
Forearm / physiology*
Humans
Mathematics
Pronation
Rotation
Shoulder Joint / physiology*
Supination

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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