Document Detail

Dynamical coupling between locomotion and respiration.
MedLine Citation:
PMID:  15052479     Owner:  NLM     Status:  MEDLINE    
In search of the formative principles underwriting locomotor-respiratory coupling, we reanalyzed and modeled the data collected by Siegmund and coworkers (1999) on the synchronization of respiration during rowing. Apart from the frequency doubling in respiration reported earlier, detailed time-resolved spectral analyses revealed decreasing stability of entrainment close to abrupt changes in frequency relations as well as switches in the relative phase between respiration and locomotion. A single physiological, albeit mechanically constrained, quantity sufficed to explain the observed frequency and phase locking phenomena: the effective value of oxygen volume in the lungs. The cyclic abdominal pressure modulates the self-sustaining rhythmic respiration, modifies the total lung pressure, and causes (local) maxima at frequency ratios between movement and respiration that are composed of small integers. Hence, optimizing the effective oxygen volume can be seen as the mechanism that drives respiration to synchronize with locomotion.
Andreas Daffertshofer; Raoul Huys; Peter J Beek
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2004-03-03
Journal Detail:
Title:  Biological cybernetics     Volume:  90     ISSN:  0340-1200     ISO Abbreviation:  Biol Cybern     Publication Date:  2004 Mar 
Date Detail:
Created Date:  2004-03-30     Completed Date:  2004-06-14     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  7502533     Medline TA:  Biol Cybern     Country:  Germany    
Other Details:
Languages:  eng     Pagination:  157-64     Citation Subset:  IM    
Faculty of Human Movement Sciences, Institute for Fundamental and Clinical Human Movement Sciences, Vrije Universiteit, Van der Boechorststraat 9, 1081 BT Amsterdam, The Netherlands.
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MeSH Terms
Locomotion / physiology*
Models, Biological
Movement / physiology
Nonlinear Dynamics*
Time Factors

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

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