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Back injuries: mechanical stresses in the human spine.
Terminal Progress Report, 1988 Jan; :1-5
Several methods were used to analyze the mechanics of the human spine during various manual materials handling tasks, resulting in the formation of several biomechanical models. The data gathered to construct these models concerned mainly the response of the cadaver lumbar motion segments in compression, sagittal plane shear and bending, frontal plane shear and bending, and torsion. Measurements were taken of force displacement, moment rotation and disc bulge responses along with intradiscal pressure increases. Exploratory studies of trunk biomechanics were made during materials handling tasks. The finite element models of lumbar motion segments were useful in analyzing internal stresses, given segment geometry, material properties and applied loads. Whole trunk deformable element models developed during the initial years of this study were extended to examine the roles of the trunk muscles in imposing loads on the motion segments during handling activities. While the human body is not rigid, much progress was made in understanding body movements by using rigid body equilibrium considerations. These models enabled the loads imposed by a physical activity on the lumbar spine and the corresponding trunk muscle contraction forces to be calculated. Initial studies on the importance of body dynamics in task performance have been initiated.
NIOSH-Grant; Musculoskeletal-system; Skeletal-system; Back-injuries; Maintenance-workers; Materials-handling; Biomechanics; Ergonomics; Muscle-function
Materials Engineering University of Illinois Dept of Materials Engr, Bx4348 Chicago, Ill 60680
Final Grant Report
NTIS Accession No.
Terminal Progress Report
University of Illinois Chicago Circle, Chicago, Illinois
Page last reviewed: March 11, 2019
Content source: National Institute for Occupational Safety and Health Education and Information Division