Document Detail

Proximodistal gradient in the perception of delayed stiffness.
MedLine Citation:
PMID:  20357066     Owner:  NLM     Status:  MEDLINE    
Proximal and distal muscles are different in size, maximum force, mechanical action, and neuromuscular control. In the current study we explore the perception of delayed stiffness when probing is executed using movement of different joints. We found a proximodistal gradient in the amount of underestimation of delayed stiffness in the transition between probing with shoulder, elbow, and wrist joints. Moreover, there was a similar gradient in the optimal weighting between estimation of stiffness and the inverse of estimation of compliance that predicted the perception of the subjects. These gradients could not be ascribed to differences in movement amplitude, duration, velocity, and force amplitude because these variables were not significantly modulated by the joint used for probing. Mean force did not follow a similar gradient either. Therefore we suggest that the observed gradient in perception reveals a proximodistal gradient in control, such that proximal joints are dominated by force control, whereas distal joints are dominated by position control.
Ilana Nisky; Pierre Baraduc; Amir Karniel
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-03-31
Journal Detail:
Title:  Journal of neurophysiology     Volume:  103     ISSN:  1522-1598     ISO Abbreviation:  J. Neurophysiol.     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-06-10     Completed Date:  2010-09-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375404     Medline TA:  J Neurophysiol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3017-26     Citation Subset:  IM    
Biomedical Engineering Department, Ben-Gurion University of the Negev, POB 653, Beer-Sheva 84105, Israel.
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MeSH Terms
Electromyography / methods
Joints / physiology
Models, Statistical
Movement / physiology*
Muscle, Skeletal / physiology*
Perception / physiology*
Predictive Value of Tests
Regression Analysis

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

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