Evaluation of the threshold of stability for the human spine

Blaszczyk, 2008, Sway ratio-a new measure for quantifying postural stability, Acta. Neurobiol. Exp. (Wars), 68, 51 Bottaro, 2005, Body sway during quiet standing: is it the residual chattering of an intermittent stabilization process?, Hum. Mov. Sci., 24, 588, 10.1016/j.humov.2005.07.006 Cholewicki, 2000, Postural control of trunk during unstable sitting, J. Biomech., 33, 1733, 10.1016/S0021-9290(00)00126-3 Collins, 1993, Open-loop and closed-loop control of posture: a random-walk analysis of center-of-pressure trajectories, Exp. Brain Res., 95, 308, 10.1007/BF00229788 Cornilleau-Peres, 2005, Measurement of the visual contribution to postural steadiness from the COP movement: methodology and reliability, Gait Posture, 22, 96, 10.1016/j.gaitpost.2004.07.009 Delignieres, 2003, A methodological note on nonlinear time series analysis: is the open- and closed-loop model of Collins and De Luca (1993) a statistical artifact?, J. Mot. Behav., 35, 86, 10.1080/00222890309602124 Dieën, 2003, Trunk muscle recruitment patterns in patients with low back pain enhance the stability of the lumbar spine, Spine, 28, 834, 10.1097/01.BRS.0000058939.51147.55 Dingwell, 2000, Slower speeds in patients with diabetic neuropathy lead to improved local dynamic stability of continuous overground walking, J. Biomech., 33, 1269, 10.1016/S0021-9290(00)00092-0 England, 2007, The influence of gait speed on local dynamic stability of walking, Gait Posture, 25, 172, 10.1016/j.gaitpost.2006.03.003 Fernie, 1982, The relationship of postural sway in standing to the incidence of falls in geriatric subjects, Age Ageing, 11, 11, 10.1093/ageing/11.1.11 Granata, 2004, Influence of fatigue in neuromuscular control of spinal stability, Hum. Factors, 46, 81, 10.1518/hfes.46.1.81.30391 2007 Hsiao-Wecksler, 2003, Predicting the dynamic postural control response from quiet-stance behavior in elderly adults, J. Biomech., 36, 1327, 10.1016/S0021-9290(03)00153-2 1993 Lee, 2008, Process stationarity and reliability of trunk postural stability, Clin. Biomech. (Bristol, Avon), 23, 735, 10.1016/j.clinbiomech.2008.01.008 Lee, 2008, Effects of trunk exertion force and direction on postural control of the trunk during unstable sitting, Clin. Biomech. (Bristol, Avon), 23, 505, 10.1016/j.clinbiomech.2008.01.003 Overstall, 1977, Falls in the elderly related to postural imbalance, Br. Med. J., 1, 261, 10.1136/bmj.1.6056.261 Panjabi, 2003, Clinical spinal instability and low back pain, J. Electromyogr. Kinesiol.., 13, 371, 10.1016/S1050-6411(03)00044-0 Prieto, 1996, Measures of postural steadiness: differences between healthy young and elderly adults, IEEE Trans. Biomed. Eng., 43, 956, 10.1109/10.532130 Reeves, 2007, Spine stability: the six blind men and the elephant, Clin. Biomech. (Bristol, Avon), 22, 266, 10.1016/j.clinbiomech.2006.11.011 Roerdink, 2006, Dynamical structure of center-of-pressure trajectories in patients recovering from stroke, Exp. Brain Res., 174, 256, 10.1007/s00221-006-0441-7 Rosenstein, 1993, A practical method for calculating largest lyapunov exponents from small data sets, Physica. D, 65, 117, 10.1016/0167-2789(93)90009-P Slota, 2008, Effects of seated whole-body vibration on postural control of the trunk during unstable seated balance, Clin. Biomech. (Bristol, Avon), 23, 381, 10.1016/j.clinbiomech.2007.11.006 Tanaka, M., 2008. Biodynamic Analysis of Human Torso Stability using Finite Time Lyapunov Exponents. Virginia Tech-Wake Forest University School of Biomedical Engineering. Virginia Polytechnic Institute and State University (Virginia Tech). Blacksburg, Ph.D. Tanaka, M.L., Granata, K.P., 2007. Methods & nonlinear analysis for measuring torso stability. In: ASCE 18th Engineering Mechanics Division Conference. Blacksburg, VA. Teasdale, 1991, Postural sway characteristics of the elderly under normal and altered visual and support surface conditions, J. Gerontol., 46, B238, 10.1093/geronj/46.6.B238 Vuillerme, 2005, Postural control during quiet standing following cervical muscular fatigue: effects of changes in sensory inputs, Neurosci. Lett., 378, 135, 10.1016/j.neulet.2004.12.024 Wolf, 1985, Determining lyapunov exponents from a time series, Phys. D: Nonlinear Phenom., 16, 285, 10.1016/0167-2789(85)90011-9