[Spinal biomechanics and the sitting position].
Our study was conducted in two stages. In a first stage, elaboration of a reliable biomechanical model for the lumbar spine, permitting to calculate for each lumbar level, for a definite posture and a given patient, the normal and tangential forces as well as the overall stresses applied to the disc, and represented by the intradiscal pressure of the nucleus pulposus and the overall stresses in the annulus fibers. This biomechanical model was constructed with the help of radiographs and formulas of forces and moments balance in comparison with a reference axis system. This biomechanical model was then used to compare stresses on the disc in various sitting positions, in order to determine an ergonomic adaptation of the sitting position at work.
Lelong
C
C
Clinique Rhumatologique, CHU de Grenoble.
Drevet
J G
JG
Chevallier
R
R
Phelip
X
X
D001696:Biomechanical Phenomena; D006801:Humans; D007403:Intervertebral Disc / Q000000981:diagnostic imaging / Q000502:physiology*; D008159:Lumbar Vertebrae / Q000000981:diagnostic imaging / Q000502:physiology*; D008433:Mathematics; D008954:Models, Biological; D011187:Posture; D011312:Pressure; D011859:Radiography; D013314:Stress, Mechanical; D014937:Work
Biomécanique rachidienne et station assise.