Original Article: PDF OnlyApplication of a Stereoradiographic Method for the Study of Intervertebral MotionPLAMONDON, ANDRÉ MSc*; GAGNON, MICHELINE PhD*; MAURAIS, GILLES MD†Author Information *From the Départment of d'éducation physique, Univeristé de Montréal, Montréal, Canada †From the Hôpital Sacré-Coeur, Département d'orthopédie, Montréal, Canada Spine: September 1988 - Volume 13 - Issue 9 - p 1027-1032 Buy Abstract A technique of three-dimensional reconstruction along with a method of adjusting anatomic landmarks were used to evaluate movements of the lumbar vertebrae of living subjects. Altogether, 16 subjects took part in the experiment. Each subject was radiographed in an upright standing position, and in each of the following positions: flexion, extension, axial rotation, and lateral bending. The results of the three-dimensional reconstruction procedures and the correction of anatomic landmarks show an adequate level of accuracy for experimentation with living subjects. The mean relative displacements of lumbar vertebrae in rotation are 10° of flexion, 3° of extension, 5° of lateral bending, and 1° of axial rotation. © Lippincott-Raven Publishers.