Document Detail

The sway-density curve and the underlying postural stabilization process.
MedLine Citation:
PMID:  15322309     Owner:  NLM     Status:  MEDLINE    
The sway-density curve (SDC) is computed by counting, for each time instant, the number of consecutive samples of the statokinesigram falling inside a circle of small radius R. The authors evaluated the sensitivity of the curve to the variation of R and found that in the range 3-5 mm the sensitivity was low, indicating that SDC is a robust descriptor of posturographic patterns. In addition, they investigated the relationship between SDC and the underlying postural stabilization process by decomposing the total ankle torque into three components: a tonic component (over 69 & of the total torque), an elastic torque caused by ankle stiffness (about 19 &), and an anticipatory active torque (about 12 &). The last component, although the smallest in size, is the most critical for the overall stability of the standing posture and appears to be correlated with the SDC curve.
Marco Jacono; Maura Casadio; Pietro G Morasso; Vittorio Sanguineti
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Motor control     Volume:  8     ISSN:  1087-1640     ISO Abbreviation:  Motor Control     Publication Date:  2004 Jul 
Date Detail:
Created Date:  2004-08-23     Completed Date:  2004-11-30     Revised Date:  2008-11-21    
Medline Journal Info:
Nlm Unique ID:  9706297     Medline TA:  Motor Control     Country:  United States    
Other Details:
Languages:  eng     Pagination:  292-311     Citation Subset:  IM    
Copyright Information:
Copyright 2004 Human Kinetics Publishers, Inc.
Center of Bioengineering, Hospital La Colletta, Arenzano, Italy.
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MeSH Terms
Ankle / physiology*
Kinesiology, Applied / instrumentation
Models, Biological*
Postural Balance*
Sensitivity and Specificity

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