The Motion Evaluation of Lumbar Spine Involving the Instantaneous Center of Rotation

Abstract

Using a special spinal-testing device, five functional spinal units obtained from pig spinal column were subjected to flexion-extension analysis in the intact state and after spinal motion segment failure/resection. Instant center of rotation under lumber FSU motion were found to study the motion characteristics at the extent of ligament damage and disc injury. The experimental results showed that the instant center of rotation seems to move as an increasing of motion segment damage.