Relation between focus of low back pain and pain evoking motion

Abstract

The relations between focus of the low back pain and pain evoking motion were studied in 42 cases of non-specific low back pain. Pain at the lower part of lumbar spine tends to be evoked by standing up. Pain at the upper part of that is evoked by sitting or standing still, pain at the middle part by lumbar flexion. In some stage of standing up, lordosis of lumbosacral portion increases. This is considered to cause higher tonus in the lower part of the intrinsic muscles. In standing or sitting still, back muscles of the upper part is consider to work harder for stabilize the posture. In lumbar flexion, the angulation of he middle part of the lumber is bigger than the both rigid end (lumbosacral and thoracolumbar portion), so middle part tend to be the focus of the pain.