Recordings of the Movement at the Intervertebral Segment L5-S1: A Technique for the Determination of the Movement in the L5-S1 Spinal Segment by Using Three Specified Postural Positions

The pathomechanism of low-back pain generation is not understood very well. Functional disturbances of motion at the individual segmental level appear to play a role in many cases. In this study a technique of numeric analysis of radiographic observations of the lumbar spine is developed by which the authors are able to assess the displacement of the two components of the L5-S1 motion segment in the sagittal plane when the subject assumes three specified standard postural positions.