title: A functional subdivision of the lumbar extensor musculature. Recruitment patterns and force-RA-EMG relationships under isometric conditions.
mesh_terms: D000293:Adolescent; D000328:Adult; D001415:Back / Q000502:physiology*; D006801:Humans; D007537:Isometric Contraction; D008161:Lumbosacral Region; D008297:Male; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology*