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Auteur (up) Maes, L.D.; Herbin, M.; Hackert, R.; Bels, V.L.; Abourachid, A. url  doi
  Titre Steady locomotion in dogs: temporal and associated spatial coordination patterns and the effect of speed Type Article scientifique
  Année 2008 Publication The Journal of Experimental Biology Revue Abrégée J Exp Biol  
  Volume 211 Numéro Pt 1 Pages 138-149  
  Mots-Clés Animals; Dogs/*physiology; Extremities/physiology; Gait/physiology; Locomotion/*physiology; Regression Analysis; Spatial Behavior/*physiology; Time Factors  
  Résumé Only a few studies on quadrupedal locomotion have investigated symmetrical and asymmetrical gaits in the same framework because the mechanisms underlying these two types of gait seem to be different and it took a long time to identify a common set of parameters for their simultaneous study. Moreover, despite the clear importance of the spatial dimension in animal locomotion, the relationship between temporal and spatial limb coordination has never been quantified before. We used anteroposterior sequence (APS) analysis to analyse 486 sequences from five malinois (Belgian shepherd) dogs moving at a large range of speeds (from 0.4 to 10.0 m s(-1)) to compare symmetrical and asymmetrical gaits through kinematic and limb coordination parameters. Considerable continuity was observed in cycle characteristics, from walk to rotary gallop, but at very high speeds an increase in swing duration reflected the use of sagittal flexibility of the vertebral axis to increase speed. This change occurred after the contribution of the increase in stride length had become the main element driving the increase in speed – i.e. when the dogs had adopted asymmetrical gaits. As the left and right limbs of a pair are linked to the same rigid structure, spatial coordination within pairs of limbs reflected the temporal coordination within pairs of limbs whatever the speed. By contrast, the relationship between the temporal and spatial coordination between pairs of limb was found to depend on speed and trunk length. For trot and rotary gallop, this relationship was thought also to depend on the additional action of trunk flexion and leg angle at footfall.  
  Adresse CNRS, MNHN, Universite P6, Col. De France, Museum National d'Histoire Naturelle, Departement Ecologie et Gestion de la Biodiversite, UMR 7179, Pavillon d'Anatomie Comparee, CP 55, 57 rue Cuvier, 75231, Paris cedex 05, France.  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0022-0949 ISBN Médium  
  Région Expédition Conférence  
  Notes PMID:18083742 Approuvé pas de  
  Numéro d'Appel MNHN-CNRS @ hackert @ collection 152  
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