عنوان مقاله [English]
Background and Aim: Aging is associated with reduction in the complexity of biological systems such as postural control system. Somatosensory system plays an important role in the complexity of the postural control system which its inputs reliability is reduced with age. Therefore, the interventions that improve complexity of postural control system by increasing sensory input can improve balance performance and reduce risk of falling.
Materials and Methods: In this study 8 faller older adults with the average age of 66.25 (±3.53) years were selected by simple non-probability sampling method. The complexity of the center of pressure (COP) sway was measured by approximate entropy in medial-lateral and anterior-posterior directions in different conditions: using textured insole [with and without textured insole] with open and closed eyes.
Results: Textured insole significantly improved medial-lateral approximate entropy values in faller older adults. The post-hoc analysis of medial-lateral approximate entropy of different postural conditions showed the approximate entropy in eyes closed with textured insole condition increased significantly compared with eyes closed without textured insole condition (p=0.004). This parameter also increased significantly (p=0.001) in eyes closed with textured insole condition compared with eyes open without textured insole condition.
Conclusion: Since textured insole increased complexity of postural sway, it can be used as an intervention which may reduce the risk of falling in older adults with a history of falling.
10. Lockhart TE, Liu J. Differentiating fall-Prone and healthy adults using local dynamic stability. Ergonomics. 2008;51(12):1860-72.##
11. Collins JJ, De Luca CJ. Random walking during quiet standing. Physical review letters. 1994;73(5):764-7.##
12. L Sturnieks D, St George R, R Lord S. Balance disorders in the elderly. NeuroPhysiologie Clinique/Clinical NeuroPhysiology. 2008;38(6):467-78.##
13. Qiu F, Cole M, Davids K, Hennig E, Silburn P, Netscher H, et al. Enhanced somatosensory information decreases Postural sway in older PeoPle. Gait & Posture. 2012;35(4):630-5.##
14. Palluel E, Nougier V, Olivier I. Do sPike insoles enhance Postural stability and Plantar-surface cutaneous sensitivity in the elderly? Age. 2008;30(1):53-61.##
15. Perry SD. Evaluation of age-related Plantar-surface insensitivity and onset age of advanced insensitivity in older adults using vibratory and touch sensation tests. Neuroscience letters. 2006;392(1):62-7.##
16. Corbin DM, Hart JM, Palmieri-Smith R, Ingersoll CD, Hertel J. The effect of textured insoles on Postural control in double and single limb stance. Journal of sPort rehabilitation. 2007;16(4).##
17. Foroughan M, JAFARI Z, SHIRIN BP, Ghaem Magham Faraahani Z, RAHGOZAR M. Validation of mini-mental state examination [MMSE] in the elderly PoPulation of Tehran. Advances in Cognitive Science. 2008. [In Persian]##
18. Toebes MJ, Hoozemans MJ, Furrer R, Dekker J, van Dieën JH. Local dynamic stability and variability of gait are associated with fall history in elderly subjects. Gait & Posture. 2012;36(3):527-31.##
19. Cavanaugh J, Guskiewicz K, Giuliani C, Marshall S, Mercer V, Stergiou N. Detecting altered Postural control after cerebral concussion in athletes with normal Postural stability. British journal of sPorts medicine. 2005;39(11):805-11.##
20. Cavanaugh JT, Mercer VS, Stergiou N. APProximate entroPy detects the effect of a secondary cognitive task on Postural control in healthy young adults: a methodological rePort. Journal of neuroengineering and rehabilitation. 2007;4(1):42.##
21. Pincus SM. APProximate entroPy as a measure of system comPlexity. Proceedings of the National Academy of Sciences. 1991;88(6):2297-301.##
22. Stergiou N. Innovative analyses of human movement: Human Kinetics Publishers; 2004.##
23. Newell KM. Degrees of freedom and the develoPment of Postural center of Pressure Profiles. APPlications of nonlinear dynamics to develoPmental Process modeling. 1998:63-84.##
24. Maurer C, Mergner T, Bolha B, Hlavacka F. Human balance control during cutaneous stimulation of the Plantar soles. Neuroscience letters. 2001;302(1):45-8.##
25. Kennedy PM, Inglis JT. Distribution and behaviour of glabrous cutaneous recePtors in the human foot sole. J Physiol. 2002 Feb 1; 538(Pt 3): 995–1002.##
26. Kavounoudias A, Roll R, Roll J-P. The Plantar sole is a'dynamometric maP'for human balance control. NeurorePort. 1998;9(14):3247-52.##
27. Palluel E, Olivier I, Nougier V. The lasting effects of sPike insoles on Postural control in the elderly. Behavioral neuroscience. 2009;123(5):1141.##
28. Maki BE, Holliday PJ, ToPPer AK. A ProsPective study of Postural balance and risk of falling in an ambulatory and indePendent elderly PoPulation. Journal of Gerontology. 1994;49(2):M72-M84.##
29. Meyer PF, Oddsson LI, De Luca CJ. The role of Plantar cutaneous sensation in unPerturbed stance. ExPerimental Brain Research. 2004;156(4):505-12.##
30. Bauer C, Gröger I, RuPPrecht R, Gaßmann KG. Intrasession reliability of force Platform Parameters in community-dwelling older adults. Archives of Physical medicine and rehabilitation. 2008;89(10):1977-82.##