Balance control in very old adults with and without visual impairment
Publication in refereed journal

香港中文大學研究人員
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摘要Good balance, an important ability in controlling body movement, declines with age. Also, balance appears to decrease when visual input is restricted, while this has been poorly investigated among visually impaired very old adults. The objective of this study is thus to explore whether the balance control of the very old differs with varying degrees of visual impairment. This crosssectional study was conducted in community centers and residential care homes. Thirty-three visually impaired (17 = low vision; 16 = blind) and 15 sighted elderly aged ≥70 years participated in the study. All participants were assessed: (1) concentric isokinetic strength of the knee extensors and flexors; (2) a sensory organization test to measure their ability to use somatosensory, visual, and vestibular information to control standing balance; (3) a perturbed double-leg stance test to assess the ability of the automatic motor system to quickly recover following an unexpected external disturbance; (4) the five times sit-tostand test. Compared with low-vision subjects, the sighted elderly achieved higher peak torque-to-body weight ratios in concentric knee extension. The sighted elderly showed less body sway than the low vision and blind subjects in sensory conditions where they benefited from visual inputs to help them maintain standing balance. The sighted and low-vision subjects achieved smaller average body sway angles during forward and backward platform translations compared to the blind subjects. Low vision and blindness decrease balance control in elderly. © 2011 Springer-Verlag.
著者Chen E.W., Fu A.S.N., Chan K.M., Tsang W.W.N.
期刊名稱European Journal of Applied Physiology
出版年份2012
月份5
日期1
卷號112
期次5
出版社Springer Verlag
出版地Germany
頁次1631 - 1636
國際標準期刊號1439-6319
語言英式英語
關鍵詞Balance control, Elderly, Visual impairment

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