5Pope MH, Panjabi M. Biomechanical definitions of spinal instability [J]. Spine, 1985, 10(3):255-256.
6Ylinen J, Salo P, Nykanen M, et al. Decreased isometric neck strength in women with chronic neck pain and the repeatability of neck strength measurements[ J]. Arch Phys Med Rehabil, 2004,85 (8) :1303-1308.
7Kauhanen S, Leivo I, Michelsson JE. Early muscle changes after immobilization: An experimental study on muscle damage [ J ]. Clin Orthop Relat Res, 1993, 297:44-50.