Quantitative analysis of surface and percutaneous electromyographic activity in lumbar erector spinae of normal young women.
Bilateral surface and fine-wire electromyographic activity from the erector spinae at the L4-5 interspace was recorded from 10 female subjects during flexion, extension, rotation to right/left, and sidebending to right/left. Fine-wire electrodes demonstrated significant left-right electromyographic differences during terminal flexion. Surface and fine-wire electromyographic recordings demonstrated a symmetric pattern of activity during extension. A symmetric pattern of erector spinae activity was observed during rotation using fine-wire electrodes but not from surface electrodes. Increased electromyographic activity from the contralateral erector spinae was detected by the surface electrodes during sidebending to neutral movements.
Wolf
L B
LB
Department of Rehabilitation Medicine, Emory University, Atlanta, Georgia.
Segal
R L
RL
Wolf
S L
SL
Nyberg
R
R
D000328:Adult; D001416:Back Pain / Q000503:physiopathology; D004576:Electromyography / Q000379:methods*; D005260:Female; D006801:Humans; D008161:Lumbosacral Region; D009068:Movement; D009119:Muscle Contraction / Q000502:physiology*; D009132:Muscles / Q000502:physiology*; D012016:Reference Values