Document Detail


Speed-accuracy trade-off in voluntary postural movements.
MedLine Citation:
PMID:  15995258     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
We investigated the speed and accuracy of fast voluntary movements performed by the whole body during standing. Adults stood on a force plate and performed rhythmic postural movements generating fore and back displacements of the center of pressure (shown as online visual feedback). We observed that for the same target distance, movement time increased with the ratio between target distance and target width, as predicted by Fitts'-type relationships. For different target distances, however, the linear regressions had different slopes. Instead, a single linear relation was observed for the effective target width versus mean movement speed. We discuss this finding as a result of the pronounced inherent variability of the postural control system and when such a source of variability is considered, the observed relationship can be explained. The results reveal that the accuracy of fast voluntary postural movements is deteriorated by the variability due to sway during standing.
Authors:
Marcos Duarte; Sandra M S F Freitas
Related Documents :
22501678 - Motion analysis for emotional performance of snare drums using a motion averaging method.
21235098 - Oxygenation state and twilight vision at 2438 m.
15151898 - Power spectral density analysis of lateral human standing sway.
9726668 - Postural reactions induced by vertical motion of visual scenes and the effects of weigh...
8157508 - Simulation of free-field sound sources and its application to studies of cortical mecha...
7941408 - Effect of the isi on the visible persistence of a stimulus in apparent motion.
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Motor control     Volume:  9     ISSN:  1087-1640     ISO Abbreviation:  Motor Control     Publication Date:  2005 Apr 
Date Detail:
Created Date:  2005-07-04     Completed Date:  2005-08-02     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  9706297     Medline TA:  Motor Control     Country:  United States    
Other Details:
Languages:  eng     Pagination:  180-96     Citation Subset:  IM    
Affiliation:
Laboratory of Biophysics, Escola de Educacao Fisica e Esporte, Universidade de Sao Paulo, Brazil.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Descriptor/Qualifier:
Adult
Female
Humans
Male
Models, Biological
Movement / physiology*
Posture*
Time Factors

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


Previous Document:  Coupling of force variability in bimanual tapping with asymmetrical force.
Next Document:  Adaptation to separate kinematic and dynamic transformations in children and adults.