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10:41
Method to Measure Tone of Axial and Proximal Muscle
Published on: December 14, 2011
X-ray of trunk rotation
1Neurological Clinic, 2nd Medical Faculty, Charles University, Prague-Vinohrady, Czech Republic.
Journal of Manipulative and Physiological Therapeutics
|October 6, 1997
Summary
Trunk rotation involves coupled side bending and rotation in the lumbar spine, continuing into the thoracic spine. Movement restrictions at the thoracolumbar junction are not visible on X-rays.
Area of Science:
- Biomechanics
- Spinal Anatomy
- Neurology
Background:
- The lumbar zygapophyseal joints are thought to limit axial rotation.
- Understanding thoracolumbar spine mechanics during trunk rotation is crucial for diagnosing and treating spinal restrictions.
Purpose of the Study:
- To elucidate the mechanism of the thoracolumbar spine during trunk rotation.
- To investigate the nature of movement restrictions in the thoracolumbar spine.
Main Methods:
- Patients with unilateral rotation restriction underwent examination with the pelvis fixed.
- Maximum trunk rotations (right and left) were assessed before and after mobilization.
- Anteroposterior X-rays were taken with a horizontal beam during maximal rotation.
Main Results:
- Coupled rotation and side flexion occurred during trunk rotation in all patients.
- Movement initiated at L5 and progressed cranially without a distinct maximum.
- The thoracolumbar junction, often near midline, showed opposite thoracic spine bending when restricted.
Conclusions:
- Contrary to assumptions, coupled side bending and rotation occur in the lumbar spine during trunk rotation.
- This coupled motion extends seamlessly into the thoracic spine.
- Radiographic visualization of movement restriction sites, typically at the thoracolumbar junction, is not possible.
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