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Twisting of the human back in forward flexion
Summary
Twisting the spine while bent forward increases rotational ability, potentially leading to intervertebral disc injury. This study investigated spinal torsion and flexion to understand injury mechanisms.
Area of Science:
- Biomechanics
- Spinal Injury Research
- Human Movement Analysis
Background:
- Spinal injuries can result from complex movements.
- Understanding the biomechanics of spinal torsion is crucial for injury prevention.
Purpose of the Study:
- To investigate the role of spinal torsion in injury production.
- To examine the combined effects of torsion and flexion on spinal mobility.
Main Methods:
- Utilized a non-invasive, three-dimensional opto-electronic CODA-3 scanner.
- Measured spinal mobility in 16 healthy males in upright and flexed postures.
- Assessed the ability to twist the back in various positions.
Main Results:
- Rotational ability generally increased in flexed postures.
- This increase is likely due to the opening of lumbar zygapophysial joints.
- Suggests a potential mechanism for intervertebral disc injury.
Conclusions:
- Twisting the spine in a flexed position may cause intervertebral disc injury.
- Flexed postures enhance spinal rotation, increasing injury risk.
- Further research into combined spinal movements and injury is warranted.