Physical Activity and Postural Control in the Elderly: Coupling between Visual Information and Body Sway

Background: Aging is characterized by a decline in the postural control performance, which is based on a coherent and stable coupling between sensory information and motor action. Therefore, changes in postural control in elderlies can be related to changes in this coupling. In addition, it has been observed that physical activity seems to improve postural control performance in elderlies. These improvements can be due to changes in the coupling between sensory information and motor action related to postural control. Objective: The purpose of this study was to verify the coupling between visual information and body sway in active and sedentary elderlies. Methods: Sixteen sedentary elderlies (SE), 16 active elderlies (AE) and 16 young adults (YA) were asked to stand upright inside a moving room in two experimental conditions: (1) discrete movement and (2) continuous movement of the room. Results: In the continuous condition, the results showed that the coupling between the movement of the room and body sway was stronger and more stable for SE and AE compared to YA. In the discrete condition, SE showed larger body displacement compared to AE and YA. Conclusions:SE have more difficulty to discriminate and to integrate sensory information than AE and YA indicating that physical activity may improve sensory integration.

[1]  C. Gielen,et al.  Temporal stability of the action-perception cycle for postural control in a moving visual environment , 2004, Experimental Brain Research.

[2]  Martin A. Giese,et al.  Frequency dependence of the action-perception cycle for postural control in a moving visual environment: relative phase dynamics , 1994, Biological Cybernetics.

[3]  Marsha Dowda,et al.  Spectral characteristics of aging postural control , 1996 .

[4]  Gérome C. Gauchard,et al.  Beneficial effect of proprioceptive physical activities on balance control in elderly human subjects , 1999, Neuroscience Letters.

[5]  M. G. Wade,et al.  Optical flow, spatial orientation, and the control of posture in the elderly. , 1995, The journals of gerontology. Series B, Psychological sciences and social sciences.

[6]  G. Gauchard,et al.  Effects of physical and sporting activities on balance control in elderly people. , 1999, British journal of sports medicine.

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

[8]  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.

[9]  D. Madden,et al.  Adult Age Differences in Visual Acuity, Stereopsis, and Contrast Sensitivity , 1987, American journal of optometry and physiological optics.

[10]  Marsha Dowda,et al.  Spectral characteristics of ageing postural control , 1995 .

[11]  David N. Lee,et al.  Visual proprioceptive control of standing in human infants , 1974 .

[12]  Postural Balance and Self-Reported Exercise in Older Adults , 2000 .

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

[14]  Jane E. Clark,et al.  Postural control in children. Coupling to dynamic somatosensory information. , 2003, Experimental brain research.

[15]  J E Frijters,et al.  A short questionnaire for the measurement of habitual physical activity in epidemiological studies. , 1982, The American journal of clinical nutrition.