Patterns of muscular activity during movement in patients with chronic low-back pain.
Bilateral paraspinal electromyogram (EMG) at levels L1-L2 and L4-L5, and abdominal EMG of a group of 20 low-back pain patients were compared to those of a group of 20 pain-free controls during flexion, extension, lateral bending to right and left, and rotation to right and left. The results showed no significant left-right differences in paraspinal EMG levels between low-back pain patients and pain-free controls during any of the movements. However, patterns of paraspinal and abdominal EMG were found to be different for low-back pain patients compared to pain-free controls during flexion only.
D000009:Abdominal Muscles / Q000503:physiopathology; D000328:Adult; D000704:Analysis of Variance; D001416:Back Pain / Q000503:physiopathology*; D004576:Electromyography; D005260:Female; D006801:Humans; D008161:Lumbosacral Region / Q000503:physiopathology; D008297:Male; D009068:Movement; D009132:Muscles / Q000503:physiopathology*; D011187:Posture; D012737:Sex Factors