Postural sensitivity to visual flow in aging adults with and without balance problems.

Postural sensitivity to visual flow in aging adults with and without balance problems.
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有或没有平衡问题的老年人对视觉流的姿势敏感性。

DOI:
10.1093/gerona/51a.2.m45
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发表时间:
1996
期刊:
The journals of gerontology. Series A, Biological sciences and medical sciences
影响因子:
--
通讯作者:
Moore,S
Moore,S
中科院分区:
--
文献类型:
--
作者:
Sundermier,L;Woollacott,MH;Jensen,JL;Moore,S

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背景本研究测试了年轻人和老年人的平衡行为,有和没有平衡问题,从一个移动的视觉环境中的视觉流的反应。平衡行为指数的力量板措施的最大前/后位移的中心足压力和水平剪切力。样本包括正常年轻人(n = 13;平均年龄23岁,± 7.5),正常老年人(n = 13;平均年龄76岁,± 6.5),和老年人的平衡问题不直接归因于可诊断的神经系统疾病或功能障碍(n = 13;平均年龄79岁,± 5.8)。当受到意外刺激时,受平衡影响的老年组比年轻组有更大的摇摆反应(与第一次试验相同; p <0.05)。每组中的一些个体具有较大的响应,这些响应是组中值的统计离群值。平衡影响组的剪切力明显大于年轻组。更大的摇摆反应表明过度依赖视觉线索的平衡影响的老龄组,这可能与潜在的,边缘的躯体感觉缺陷,在这组的神经系统检查的躯体感觉障碍的亚临床适应症的模式所示的姿势控制。然而,视觉敏感的姿势控制可能来自几个不同的潜在过程。平衡受影响组在平衡反应过程中的剪切力升高表明,除了踝关节运动外,更多地使用髋关节运动进行姿势调整。
Background. This study tested balance behavior of young adults and aging adults with and without balance problems in response to visual flow from a moving visual surround.Methods. Balance behavior was indexed by force plate measures of maximum anterior/posterior displacement of the center of foot pressure and horizontal shear forces. The sample included normal young adults (n = 13; mean age 23 years, ± 7.5), normal aging adults (n = 13; mean age 76 years, ± 6.5), and aging adults with balance problems not directly attributable to a diagnosable neurological disease or dysfunction (n = 13; mean age 79 years, ± 5.8).Results. The balance-affected aging group had statistically greater sway responses than the young group when the stimulus was unexpected (as in the first trial; p < .05). Some individuals in each group had large responses that were statistical outliers from the group median. The balance-affected group had significantly greater shear forces than the young group.Conclusions. Greater sway responses suggest over-reliance on visual cues for posture control in the balance-affected aging group, which may be related to underlying, borderline somatosensory deficits, as indicated by the patterns of subclinical indications for somatosensory impairments on neurological exams in this group. Visually sensitive postural control, however, may issue from several different underlying processes. Elevated shear forces during balance responses in the balance-affected group suggest a greater use of hip movements in addition to ankle movements for postural adjustments.
DOI: 10.1093/geronb/50b.1.p51
发表时间: 1995
期刊: The journals of gerontology. Series B, Psychological sciences and social sciences
影响因子: --
作者:
Wade,MG;Lindquist,R;Taylor,JR;Treat-Jacobson,D
通讯作者: Treat-Jacobson,D
姿势和步态:发展、适应和调节作者:Bernard Amblard、Alain Berthoz 和 François Clarac(编辑),医学摘录,阿姆斯特丹-纽约-牛津,1988 年,ICS 812,Dfl。
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发表时间: 1989
影响因子: 4.4
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期刊: International journal of sport biomechanics
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DOI: 10.1177/000348947208100203
发表时间: 1972-01-01
影响因子: 1.4
作者:
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通讯作者: HAWKINS, JE
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DOI: 10.1159/000244784
发表时间: 1963
期刊: Gerontologia clinica
影响因子: --
作者:
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通讯作者: J. Sheldon