Electromyography of deep back muscles in man.
D001415:Back; D004576:Electromyography; D005260:Female; D006801:Humans; D008161:Lumbosacral Region; D008297:Male; D008722:Methods; D009068:Movement; D009132:Muscles / Q000502:physiology*; D013909:Thorax; D013997:Time Factors