Accession Number:

ADA622194

Title:

Lumbar Spine Musculoskeletal Physiology and Biomechanics During Simulated Military Operations

Descriptive Note:

Annual rept. 1 Jun 2014-31 May 2015

Corporate Author:

CALIFORNIA UNIV SAN DIEGO LA JOLLA

Report Date:

2015-06-01

Pagination or Media Count:

20.0

Abstract:

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. 42 Marines were scanned using upright MRI in a normal standing position, and in simulated operational conditions wearing PPE n30 weight11.4kg, or scanned wearing load 22kg, 33kg, 45kg distributed 2080 or 5050 anteriorposterior n12. 28 Marines were scanned in a highresolution 3T MRI scanner to quantify muscle quality and IVD degeneration. Lumbar lordosis significantly decreases at all levels except L1L2 when sitting. Even anteriorposterior distribution of load maintains whole lumbar lordosis as load increases. Subjects with IVD degeneration at L4L5 had muscle volume differences.

Subject Categories:

  • Medicine and Medical Research
  • Stress Physiology
  • Human Factors Engineering and Man Machine Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE