Effect of aging on the coordination between equilibrium and movement: what changes?

This investigation studies the effect of aging on the coordination between equilibrium and trunk movement. Eight young adults and seven adults at the end of middle age bent their trunk forward and stabilized their position. The center of mass shift was studied as an indicator of equilibrium control as was the electromyographic pattern of the main muscles involved in the movement. The kinematic strategy responsible for both the movement and equilibrium control was quantified by performing a principal components analysis on the hip, knee, ankle angle changes occurring during the movement. We observed that the effect of aging can be detected early. It is not expressed as a deterioration of equilibrium control but rather as “over control”. The kinematic strategy is modified, the central command adapted. These results could express the onset of a lesser ability to simplify the coordination between equilibrium and movement as young adults leading to its deterioration in the elderly.

[1]  P. Derambure,et al.  Effect of age on anticipatory postural adjustments in unilateral arm movement. , 2006, Gait & posture.

[2]  V. Hatzitaki,et al.  Age-induced modifications of static postural control in humans , 2003, Neuroscience Letters.

[3]  S. Park,et al.  Feedback equilibrium control during human standing , 2005, Biological Cybernetics.

[4]  Alexander A. Frolov,et al.  Biomechanical analysis of movement strategies in human forward trunk bending. I. Modeling , 2001, Biological Cybernetics.

[5]  O. Beauchet,et al.  Decreased trunk angular displacement during sitting down: an early feature of aging. , 2005, Physical therapy.

[6]  Serge Mesure,et al.  Balance control and adaptation of kinematic synergy in aging adults during forward trunk bending , 2007, Neuroscience Letters.

[7]  Maciej Bosek,et al.  Degradation of postural control system as a consequence of Parkinson's disease and ageing , 2005, Neuroscience Letters.

[8]  Alexander A. Frolov,et al.  Biomechanical analysis of movement strategies in human forward trunk bending. II. Experimental study , 2001, Biological Cybernetics.

[9]  John P Hirdes,et al.  Risk factors for falling among community-based seniors using home care services. , 2002, The journals of gerontology. Series A, Biological sciences and medical sciences.

[10]  L. Nashner,et al.  The organization of human postural movements: A formal basis and experimental synthesis , 1985, Behavioral and Brain Sciences.

[11]  J. Massion,et al.  Axial synergies during human upper trunk bending , 1998, Experimental Brain Research.

[12]  C D Mah,et al.  Quantitative analysis of human movement synergies: constructive pattern analysis for gait. , 1994, Journal of motor behavior.

[13]  F. Horak,et al.  Components of postural dyscontrol in the elderly: A review , 1989, Neurobiology of Aging.

[14]  J. Massion,et al.  Forward and backward axial synergies in man , 2004, Experimental Brain Research.

[15]  J. Massion,et al.  Kinematic synergies and equilibrium control during trunk movement under loaded and unloaded conditions , 1999, Experimental Brain Research.

[16]  F. Horak,et al.  Central programming of postural movements: adaptation to altered support-surface configurations. , 1986, Journal of neurophysiology.

[17]  N. A. Bernshteĭn The co-ordination and regulation of movements , 1967 .

[18]  C. F. Ramos,et al.  Postural maintenance during fast forward bending: a model simulation experiment determines the “reduced trajectory” , 2004, Experimental Brain Research.

[19]  A Thorstensson,et al.  Fast voluntary trunk flexion movements in standing: motor patterns. , 1987, Acta physiologica Scandinavica.

[20]  T. Brandt,et al.  Disorders of posture and gait. , 1990, Journal of vestibular research : equilibrium & orientation.

[21]  J. Massion,et al.  Is the center of gravity controlled during upper trunk movements? , 1996, Neuroscience Letters.

[22]  Anatol G. Feldman,et al.  Interjoint coordination in lower limbs during different movements in humans , 2002, Experimental Brain Research.

[23]  Caroline Paquette,et al.  Aging affects coordination of rapid head motions with trunk and pelvis movements during standing and walking. , 2006, Gait & posture.

[24]  P. Crenna,et al.  A motor programme for the initiation of forward‐oriented movements in humans. , 1991, The Journal of physiology.

[25]  J. Massion,et al.  Kinematic synergy adaptation to an unstable support surface and equilibrium maintenance during forward trunk movement , 2006, Experimental Brain Research.

[26]  J Massion,et al.  Kinematic synergy adaptation to microgravity during forward trunk movement. , 2000, Journal of neurophysiology.

[27]  A. Pedotti,et al.  Postural synergies in axial movements: short and long-term adaptation , 2004, Experimental Brain Research.

[28]  Alexander Frolov,et al.  Why and how are posture and movement coordinated? , 2004, Progress in brain research.

[29]  Chien-Chun Huang,et al.  Postural fluctuations during pointing from a unilateral or bilateral stance. , 2006, Human movement science.