The Dynamics of Visual Reweighting in Healthy and Fall-Prone Older Adults

ABSTRACT Multisensory reweighting (MSR) is an adaptive process that prioritizes the visual, vestibular, and somatosensory inputs to provide the most reliable information for postural stability when environmental conditions change. This process is thought to degrade with increasing age and to be particularly deficient in fall-prone versus healthy older adults. In the present study, the authors investigate the dynamics of sensory reweighting, which is not well-understood at any age. Postural sway of young, healthy, and fall-prone older adults was measured in response to large changes in the visual motion stimulus amplitude within a trial. Absolute levels of gain, and the rate of adaptive gain change were examined when visual stimulus amplitude changed from high to low and from low to high. Compared with young adults, gains in both older adult groups were higher when the stimulus amplitude was high. Gains in the fall-prone elderly were higher than both other groups when the stimulus amplitude was low. Both older groups demonstrated slowed sensory reweighting over prolonged time periods when the stimulus amplitude was high. The combination of higher vision gains and slower down weighting in older adults suggest deficits that may contribute to postural instability.

[1]  Thomas R. Kane,et al.  THEORY AND APPLICATIONS , 1984 .

[2]  Marjorie H. Woollacott,et al.  Aging and Posture Control: Changes in Sensory Organization and Muscular Coordination , 1986, International journal of aging & human development.

[3]  F. Schmitt,et al.  Predicting Intellectual Level from the Mini—Mental State Examination , 1988, Journal of the American Geriatrics Society.

[4]  F. Horak,et al.  Influence of stimulus parameters on human postural responses. , 1988, Journal of neurophysiology.

[5]  L. Nashner,et al.  Sensory, neuromuscular, and biochemical contributions to human balance , 1989 .

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

[7]  L. Nashner,et al.  A dynamic posturography study of balance in healthy elderly , 1992, Neurology.

[8]  L. Wolfson,et al.  Altered sensory function and balance in older persons. , 1993, Journal of gerontology.

[9]  Nicholas I. Fisher,et al.  Statistical Analysis of Circular Data , 1993 .

[10]  P. Sprent,et al.  Statistical Analysis of Circular Data. , 1994 .

[11]  M. Tinetti,et al.  A multifactorial intervention to reduce the risk of falling among elderly people living in the community. , 1994, The New England journal of medicine.

[12]  N. Alexander,et al.  Postural Control in Older Adults , 1994, Journal of the American Geriatrics Society.

[13]  N. Bohnen Technique of the Neurologic Examination: A Programmed Text , 1994 .

[14]  R. Fitzpatrick,et al.  Proprioceptive, visual and vestibular thresholds for the perception of sway during standing in humans. , 1994, The Journal of physiology.

[15]  J. Jensen,et al.  Postural sensitivity to visual flow in aging adults with and without balance problems. , 1996, The journals of gerontology. Series A, Biological sciences and medical sciences.

[16]  Denise F. Polit,et al.  Data analysis & statistics for nursing research , 1996 .

[17]  F Englander,et al.  Economic dimensions of slip and fall injuries. , 1996, Journal of forensic sciences.

[18]  B E Maki,et al.  Influence of arousal and attention on the control of postural sway. , 1996, Journal of vestibular research : equilibrium & orientation.

[19]  B E Maki,et al.  Preferred placement of the feet during quiet stance: development of a standardized foot placement for balance testing. , 1997, Clinical biomechanics.

[20]  A. Shumway-cook,et al.  Predicting the probability for falls in community-dwelling older adults. , 1997, Physical therapy.

[21]  Christianna S. Williams,et al.  The effect of falls and fall injuries on functioning in community-dwelling older persons. , 1998, The journals of gerontology. Series A, Biological sciences and medical sciences.

[22]  C. Bard,et al.  Aging and Postural Control: Postural Perturbations Caused by Changing the Visual Anchor , 1999, Journal of the American Geriatrics Society.

[23]  S. Brauer,et al.  A prospective study of laboratory and clinical measures of postural stability to predict community-dwelling fallers. , 2000, The journals of gerontology. Series A, Biological sciences and medical sciences.

[24]  Tim Kiemel,et al.  Multisensory information for human postural control: integrating touch and vision , 2000, Experimental Brain Research.

[25]  M. Woollacott,et al.  Systems contributing to balance disorders in older adults. , 2000, The journals of gerontology. Series A, Biological sciences and medical sciences.

[26]  J. Bendat,et al.  Random Data: Analysis and Measurement Procedures , 1987 .

[27]  M. Woollacott,et al.  Attentional demands and postural control: the effect of sensory context. , 2000, The journals of gerontology. Series A, Biological sciences and medical sciences.

[28]  M. Woollacott,et al.  Predicting the probability for falls in community-dwelling older adults using the Timed Up & Go Test. , 2000, Physical therapy.

[29]  Tim Kiemel,et al.  Multisensory fusion and the stochastic structure of postural sway , 2002, Biological Cybernetics.

[30]  R. Peterka Sensorimotor integration in human postural control. , 2002, Journal of neurophysiology.

[31]  Gammon M. Earhart,et al.  Does the cerebellum play a role in podokinetic adaptation? , 2002, Experimental Brain Research.

[32]  Kelvin S. Oie,et al.  Multisensory fusion: simultaneous re-weighting of vision and touch for the control of human posture. , 2002, Brain research. Cognitive brain research.

[33]  L. Nyberg,et al.  Fall and Injury Prevention in Residential Care—Effects in Residents with Higher and Lower Levels of Cognition , 2003, Journal of the American Geriatrics Society.

[34]  Robert J Peterka,et al.  Dynamic regulation of sensorimotor integration in human postural control. , 2004, Journal of neurophysiology.

[35]  Y. Lajoie,et al.  Predicting falls within the elderly community: comparison of postural sway, reaction time, the Berg balance scale and the Activities-specific Balance Confidence (ABC) scale for comparing fallers and non-fallers. , 2004, Archives of gerontology and geriatrics.

[36]  Tim Kiemel,et al.  Controlling human upright posture: velocity information is more accurate than position or acceleration. , 2004, Journal of neurophysiology.

[37]  Gérome C Gauchard,et al.  Higher visual dependency increases balance control perturbation during cognitive task fulfilment in elderly people , 2004, Neuroscience Letters.

[38]  Michelle Fleury,et al.  Availability of visual and proprioceptive afferent messages and postural control in elderly adults , 1996, Experimental Brain Research.

[39]  N. Teasdale,et al.  Age differences in visual sensory integration , 1991, Experimental Brain Research.

[40]  Mark S Redfern,et al.  Clinical measurement of sit-to-stand performance in people with balance disorders: validity of data for the Five-Times-Sit-to-Stand Test. , 2005, Physical therapy.

[41]  L. Brown,et al.  Age-dependent differences in the time course of postural control during sensory perturbations , 2006, Aging clinical and experimental research.

[42]  T. Kiemel,et al.  Multisensory reweighting of vision and touch is intact in healthy and fall-prone older adults , 2006, Experimental Brain Research.

[43]  Richard W. Bohannon,et al.  Reference Values for the Five-Repetition Sit-to-Stand Test: A Descriptive Meta-Analysis of Data from Elders , 2006, Perceptual and motor skills.

[44]  S. Studenski,et al.  Striatal dopamine denervation and sensory integration for balance in middle-aged and older adults. , 2007, Gait & posture.

[45]  T. Stoffregen,et al.  Postural Sway during Dual Tasks in Young and Elderly Adults , 2007, Gerontology.

[46]  G. Gauchard,et al.  Age-related part taken by attentional cognitive processes in standing postural control in a dual-task context. , 2007, Gait & posture.

[47]  Kelvin S. Oie,et al.  Asymmetric adaptation with functional advantage in human sensorimotor control , 2008, Experimental Brain Research.

[48]  Patrick J Loughlin,et al.  Postural adaptations to repeated optic flow stimulation in older adults. , 2008, Gait & posture.

[49]  M. Redfern,et al.  Perceptual inhibition is associated with sensory integration in standing postural control among older adults. , 2009, The journals of gerontology. Series B, Psychological sciences and social sciences.

[50]  M. Redfern,et al.  Inhibitory Processes Relate Differently to Balance/Reaction Time Dual Tasks in Young and Older Adults , 2009, Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition.

[51]  Andrej Pázman,et al.  Nonlinear Regression , 2019, Handbook of Regression Analysis With Applications in R.

[52]  F. Horak,et al.  Postural Orientation and Equilibrium , 2011 .