Lumbar paraspinal muscle function, perception of lumbar position, and postural control in disc herniation-related back pain.

Study Design: A follow-up study evaluating postural control, lumbar movement perception, and paraspinal muscle reflexes in disc herniation-related chronic low back pain (LBP) before and after discectomy.

Objectives: To assess the effect of discectomy on postural control, lumbar perception, and reflex activation of paraspinal muscles during sudden upper limb loading.

Summary Of Background Data: Impaired muscle function, postural control, and lumbar proprioception have been observed in LBP.

Impaired lumbar movement perception in association with postural stability and motor- and somatosensory-evoked potentials in lumbar spinal stenosis.

Study Design: A descriptive study of the associations between different neurophysiologic findings in patients with lumbar spinal stenosis.

Objectives: To evaluate the ability to sense a change in lumbar position and the associations between lumbar movement perception, postural stability, and motor-evoked potentials and somatosensory-evoked potentials.

Summary Of Background Data: Patients with low back pain have impaired postural control and impaired lumbar proprioception.