Lumbar Spine Musculoskeletal Physiology and Biomechanics During Simulated Military Operations
Technical Report,01 Jun 2015,31 May 2016
University of California, San Diego La Jolla United States
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This study evaluated the relationship between 3D geometry of the lumbar spine, under different loading conditions and positions, and the pathophysiology of the intervertebral disc and lumbar trunk muscles. 43 Marines were scanned using upright MRI in operationally relevant loading conditions with minimum load, 39 of these Marines were also scanned in a high-resolution MRI scanner to muscle and disc pathophysiological assessment. Significant decreases in lumbar lordosis were found through all levels except L1-L2 when sitting. When prone on elbows, the only increase in lumbar lordosis was found at L5-S1. A caudal increase in fat fraction of the multifidus was observed, with no significant increase in the erector spine. No significant correlations were found between disc injury and muscle pathophysiology.
- Anatomy and Physiology