COMPARISON OF 2 METHODS OF MEASURING SPINE ANGULAR KINEMATICS DURING DYNAMIC FLEXION MOVEMENTS: SKIN-MOUNTED MARKERS COMPARED WITH MARKERS AFFIXED TO RIGID BODIES

摘要

Objective: The purpose of this study was to compare the spine flexion angle time histories computed with the 2 described techniques (dot product [DP] and a modified joint coordinate system [JCS] approaches) that used vector algebra and used skin-mounted markers to the spine flexion angles derived using local coordinate systems constructed from rigid bodies affixed to the pelvis and thorax during spine flexion movements.