Foundation for Systems Anthropometry: Lumbar/Pelvic Kinematics

摘要

Research protocol and results from System Anthropometry Laboratory's three-dimensional investigation of the lumbar/pelvis linkage system are presented. A stereoradiographic system measures three-dimensional coordinates of implanted targets in the skeletal system of an unembalmed cadaver seated in a wooden seat conforming to Air Force specifications. The cadaver is experimentally positioned to obtain three-dimensional data on lumbar extension, flexion, and lateral sidebending motions. Data are analyzed to provide a screw axis description of the instantaneous axis of rotation for each change of position. In addition, position vectors are calculated that describe locations of the bones in the lumbar/pelvic linkage system and a point on the screw axis closest to the origin of the bone frame of reference. The data are presented in three-dimensional coordinates measured in a laboratory with a spatial accuracy of approximately + or minus 0.03 cm. The extensive references to measurement and measurement techniques studies offer a listing not presented elsewhere in the literature, or in other reviews of the literature, and with particular application to systems anthropometry, from the fields of anthropometry, osteology, kinematics, and three-dimensional measurement techniques.