Begona Mateo

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This study demonstrates that appropriate measurement procedures can detect differences in head movement in a near reading task when using three different progressive addition lenses (PALs). The movements were measured using an anatomical reference system with a biomechanical rationale. This reference system was capable of representing rotations for(More)
—This paper describes a method for calculating the vectorial kinematic parameters of 3D human movement by stereophotogrammetry, with special emphasis on an accurate characterization of the Instantaneous Helical Axis. That method is applied to the measure of trunk flexion in sitting posture, the results being interpreted in biomechanical terms, and compared(More)
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