Document Detail


Mechanisms of interpersonal sway synchrony and stability.
MedLine Citation:
PMID:  25339686     Owner:  NLM     Status:  In-Process    
Abstract/OtherAbstract:
Here we explain the neural and mechanical mechanisms responsible for synchronizing sway and improving postural control during physical contact with another standing person. Postural control processes were modelled using an inverted pendulum under continuous feedback control. Interpersonal interactions were simulated either by coupling the sensory feedback loops or by physically coupling the pendulums with a damped spring. These simulations precisely recreated the timing and magnitude of sway interactions observed empirically. Effects of firmly grasping another person's shoulder were explained entirely by the mechanical linkage. This contrasted with light touch and/or visual contact, which were explained by a sensory weighting phenomenon; each person's estimate of upright was based on a weighted combination of veridical sensory feedback combined with a small contribution from their partner. Under these circumstances, the model predicted reductions in sway even without the need to distinguish between self and partner motion. Our findings explain the seemingly paradoxical observation that touching a swaying person can improve postural control.
Authors:
Raymond F Reynolds; Callum J Osler
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of the Royal Society, Interface / the Royal Society     Volume:  11     ISSN:  1742-5662     ISO Abbreviation:  J R Soc Interface     Publication Date:  2014 Dec 
Date Detail:
Created Date:  2014-10-23     Completed Date:  -     Revised Date:  2014-12-06    
Medline Journal Info:
Nlm Unique ID:  101217269     Medline TA:  J R Soc Interface     Country:  England    
Other Details:
Languages:  eng     Pagination:  20140751     Citation Subset:  IM    
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MeSH Terms
Descriptor/Qualifier:
Grant Support
ID/Acronym/Agency:
BB/100579X/1//Biotechnology and Biological Sciences Research Council

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