Posteroanterior stiffness predicts sagittal plane midthoracic range of motion and three-dimensional flexibility in cadaveric spine segments

Sran, Meena M., Khan, Karim M., Zhu, Qingan and Oxland, Thomas R. (2005) Posteroanterior stiffness predicts sagittal plane midthoracic range of motion and three-dimensional flexibility in cadaveric spine segments. Clinical Biomechanics, 20 8: 806-812. doi:10.1016/j.clinbiomech.2005.04.009


Author Sran, Meena M.
Khan, Karim M.
Zhu, Qingan
Oxland, Thomas R.
Title Posteroanterior stiffness predicts sagittal plane midthoracic range of motion and three-dimensional flexibility in cadaveric spine segments
Journal name Clinical Biomechanics   Check publisher's open access policy
ISSN 0268-0033
1879-1271
Publication date 2005-10-01
Sub-type Article (original research)
DOI 10.1016/j.clinbiomech.2005.04.009
Open Access Status Not yet assessed
Volume 20
Issue 8
Start page 806
End page 812
Total pages 7
Place of publication Exeter, England
Publisher Elsevier
Language eng
Subject 110601 Biomechanics
1103 Clinical Sciences
Abstract Background. Spinal joint mobilization is a mainstay of clinical assessment of individuals with back pain. The clinician manually assesses stiffness and joint motion relative to segments above and below. Although clinical theory suggests that manually performed techniques can predict or detect intervertebral motion, this hypothesis remains untested. Methods. Using a precision opto-electronic camera system and a custom spine testing machine, we measured intervertebral range of motion, neutral zone motion and three-dimensional flexibility in eight T5–T8 cadaveric specimens (mean age = 81 years). We then measured stiffness when a cyclic posteroanterior load was applied at the spinous process of T6 using a servohydraulic material testing machine (Instron 8874), simulating the posteroanterior spinal mobilization technique. Findings. There was a strong significant inverse relationship between stiffness during cyclic posteroanterior loading of T6 and flexion or extension range of motion of T6 relative to T7 (r = −0.88, P < 0.01, extension; r = −0.81, P = 0.01, flexion), and T6–T7 flexibility in all six directions. Interpretation. Stiffness during simulated central cyclic posteroanterior mobilization in the cadaveric midthoracic spine is inversely correlated with flexion and extension range of motion and three-dimensional flexibility at the level at which the technique is applied. These findings provide biomechanical support for the inclusion of specific joint mobilization in the assessment of older adults with back pain.
Keyword Spine biomechanics
Thoracic
Flexibility
Mobilization
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
School of Human Movement and Nutrition Sciences Publications
 
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