Document Detail


A comparison of subtalar joint motion during anticipated medial cutting turns and level walking using a multi-segment foot model.
MedLine Citation:
PMID:  19897368     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The weight-bearing in-vivo kinematics and kinetics of the talocrural joint, subtalar joint and joints of the foot were quantified using optical motion analysis. Twelve healthy subjects were studied during level walking and anticipated medial turns at self-selected pace. A multi-segment model of the foot using skin-mounted marker triads tracked four foot segments: the hindfoot, midfoot, lateral and medial forefoot. The lower leg and thigh were also tracked. Motion between each of the segments could occur in three degrees of rotational freedom, but only six inter-segmental motions were reported in this study: (1) talocrural dorsi-plantar-flexion, (2) subtalar inversion-eversion, (3) frontal plane hindfoot motion, (4) transverse plane hindfoot motion, (5) forefoot supination-pronation twisting and (6) the height-to-length ratio of the medial longitudinal arch. The motion at the subtalar joint during stance phase of walking (eversion then inversion) was reversed during a turning task (inversion then eversion). The external subtalar joint moment was also changed from a moderate eversion moment during walking to a larger inversion moment during the turn. The kinematics of the talocrural joint and the joints of the foot were similar between these two tasks. During a medial turn, the subtalar joint may act to maintain the motions in the foot and talocrural joint that occur during level walking. This is occurring despite the conspicuously different trajectory of the centre of mass of the body. This may allow the foot complex to maintain its function of energy absorption followed by energy return during stance phase that is best suited to level walking.
Authors:
T R Jenkyn; R Shultz; J R Giffin; T B Birmingham
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-11-08
Journal Detail:
Title:  Gait & posture     Volume:  31     ISSN:  1879-2219     ISO Abbreviation:  Gait Posture     Publication Date:  2010 Feb 
Date Detail:
Created Date:  2010-02-03     Completed Date:  2010-05-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9416830     Medline TA:  Gait Posture     Country:  England    
Other Details:
Languages:  eng     Pagination:  153-8     Citation Subset:  IM    
Copyright Information:
Copyright 2009 Elsevier B.V. All rights reserved.
Affiliation:
Wolf Orthopaedic Biomechanics Laboratory, Fowler Kennedy Sport Medicine Clinic, The University of Western Ontario, London, Ontario, Canada. tjenkyn@eng.uwo.ca
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MeSH Terms
Descriptor/Qualifier:
Adult
Biomechanics
Female
Foot / physiology*
Gait / physiology*
Humans
Imaging, Three-Dimensional / instrumentation
Leg / physiology
Male
Models, Biological
Movement / physiology
Pronation
Subtalar Joint / physiology*
Supination
Walking / physiology*

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


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