Intervertebral Disc Kinematics in Active Duty Marines With and Without Lumbar Spine Pathology
Journal Article - Open Access
NAVAL HEALTH RESEARCH CENTER SAN DIEGO CA SAN DIEGO United States
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Low back pain LBP is a common occurrence among military members and is thought to be associated with alter kinematics and increasedintervertebral disc IVD injury resulting from postures and loads experienced during training and combat. Forty percent 165385 of IVDsshowed evidence of degeneration and 3 13385 demonstrated a disc bulge. IVD degeneration was not related to posterior annular position ofthe disc for any lumbar level p0.34. There was no effect of LBP on posterior annular position at any level p0.074. Sagittal intervertebralangles decreased with loading at the L45 and L5S1 levels p0.001 with no associated changes in posterior disc height p0.21 or relationshipwith posterior annular position p0.05. Individuals with a larger baseline posterior annular position demonstrated a larger reduction in posteriorannular position with load at all levels p0.002, with the largest reductions occurring at the lower lumbar levels. Lumbar lordosis decreased, andposterior annular position was reduced with loading in active- duty Marines, particularly in the lower lumbar levels. Presence of LBP did notinfluence IVD kinematic response to loading in this cohort.