Influence of posture on the range of axial rotation and coupled lateral flexion of the thoracic spine

Edmondston, Stephen J., Aggerholm, Mathew, Elfving, Suzanne, Flores, Neil, Ng, Christopher, Smith, Richard and Netto, Kevin 2007, Influence of posture on the range of axial rotation and coupled lateral flexion of the thoracic spine, Journal of manipulative and physiological therapeutics, vol. 30, no. 3, pp. 193-199.

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Title Influence of posture on the range of axial rotation and coupled lateral flexion of the thoracic spine
Author(s) Edmondston, Stephen J.
Aggerholm, Mathew
Elfving, Suzanne
Flores, Neil
Ng, Christopher
Smith, Richard
Netto, Kevin
Journal name Journal of manipulative and physiological therapeutics
Volume number 30
Issue number 3
Start page 193
End page 199
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2007-03
ISSN 0161-4754
1532-6586
Keyword(s) thoracic vertebrae
rotation
biomechanics
posture
Summary Objective
This study examines the influence of posture on the range of axial rotation of the thorax and the range and direction of the coupled lateral flexion.

Methods

The ranges of mid thoracic axial rotation and coupled lateral flexion were measured in 52 asymptomatic subjects (aged 18-43 years) using an optical motion analysis system. To examine the influence of posture on primary and coupled motion, we initiated axial rotation from a neutral sitting posture and from end-range thoracic flexion and extension.

Results
There was a significant decrease in the range of thoracic rotation in flexion compared with the neutral and extended postures (P < .001). The mean range of coupled lateral flexion was 8.9% of the axial rotation range in the neutral posture and increased to 14.3% and 23.2% in the extended and flexed postures, respectively. Patterns of coupled motion varied between subjects, but an ipsilateral pattern was more common in the flexed posture, whereas a contralateral pattern was more common in the neutral and extended postures.

Conclusions

The ranges and patterns of coupled motion of the thorax appear to be strongly influenced by the posture from which the movement is initiated. This has important implications in relation to the interpretation of clinical tests of thoracic motion and in consideration of mechanisms of development of thoracic pain disorders.
Language eng
Field of Research 110601
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2007, National University of Health Sciences
Persistent URL http://hdl.handle.net/10536/DRO/DU:30020381

Document type: Journal Article
Collection: School of Exercise and Nutrition Sciences
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