Abstrakt
This article deals with an experimental work on spinal segment kinematics. A structure a unique mechanism for spinal segment loading is described.
This mechanism can perform periodic loading by pure bending (flexion/extension) or by coupled bending, shear and compression. The kinematics of particular vertebra is measured by means of motion capture technique.
In this case, a commercial system Qualisys was used. The raw results are time sequences of markers coordinates corresponding to moving bodies (vertebra).
These data are post processed in a Matlab software and converted to more readable kinematic description using instantaneous axis (or center in 2D) of rotation. These experimental data will be used for numerical determination of load transition ratios between two adjacent vertebras.