Linked Life Data

20008409

Source:http://linkedlifedata.com/resource/pubmed/id/20008409

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1911
pubmed:dateCreated
2009-12-17
pubmed:abstractText
We report on experiments and modelling involving the 'visuo-postural control loop' in the upright stance. We experimentally manipulated an artificial delay to the visual feedback during standing, presented at delays ranging from 0 to 1 s in increments of 250 ms. Using stochastic delay differential equations, we explicitly modelled the centre-of-pressure (COP) and centre-of-mass (COM) dynamics with two independent delay terms for vision and proprioception. A novel 'drifting fixed point' hypothesis was used to describe the fluctuations of the COM with the COP being modelled as a faster, corrective process of the COM. The model was in good agreement with the data in terms of probability density functions, power spectral densities, short- and long-term correlations (Hurst exponents) as well the critical time between the two ranges.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
1364-503X
pubmed:author
pubmed:copyrightInfo
This journal is © 2010 The Royal Society
pubmed:issnType
Print
pubmed:day
28
pubmed:volume
368
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
423-38
pubmed:meshHeading
pubmed:year
2010
pubmed:articleTitle
Stochastic two-delay differential model of delayed visual feedback effects on postural dynamics.
pubmed:affiliation
Department of Physics, University of Ottawa, Ottawa, Ontario K1N 6N5, Canada. jboul079@uottawa.ca
pubmed:publicationType
Journal Article