Index to Chiropractic Literature
Index to Chiropractic Literature
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ID 2132
  Title X-ray of trunk rotation
Journal J Manipulative Physiol Ther. 1997 Sep;20(7):454-458
Peer Review Yes
Publication Type Article

OBJECTIVE: To establish the mechanism of the thoracolumbar spine during trunk rotation and its restriction.

DESIGN: Patients with one-sided rotation restriction were examined seated on a chair with the pelvis fixed in neutral position, at maximum right and left trunk rotations, before and after mobilization of movement restriction; anteroposterior X-rays were taken with a horizontal beam on a vertical X-ray cassette.

SETTING: University neurology clinic.

MAIN OUTCOME CRITERIA: Assessment of rotation and side bending of the thoracolumbar spine (a) on the normal and the restricted side and (b) after mobilization.

RESULTS: In all cases, there was both (coupled) rotation and side flexion during side bending, except that the thoracolumbar junction was frequently near midline; in such cases, the thoracic spine above was bent in the opposite direction. Both rotation and side-bending started at L5 and continued gradually in a cranial direction without a noticeable maximum at any level.

CONCLUSIONS: Although it is generally assumed that the configuration of the lumbar zygapophyseal joints precludes axial rotation in the lumbar spine, I find that, during trunk rotation, a coupled movement of side bending and rotation takes place in the lumbar spine and continues without a noticeable break into the thoracic spine. The site of movement restriction, which usually seems to be located at the thoracolumbar junction, cannot be visualized on X-rays.

This abstract is reproduced with the permission of the publisher; full text is available by subscription. Click on the above link and select a publisher from PubMed's LinkOut feature.


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