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首页> 外文期刊>Gait & posture >Coordination of segments reorientation during on-the-spot turns in healthy older adults in eyes-open and eyes-closed conditions.
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Coordination of segments reorientation during on-the-spot turns in healthy older adults in eyes-open and eyes-closed conditions.

机译：在健康的老年人中，在睁开和闭眼的情况下，在现场转弯时节段重新定向的协调。

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Turning has frequent occurrence in everyday activities. Despite the prevalence of turning in everyday life and the challenge it poses to older adults, there is far less known about the multisegmental control of turning than the control of standing and straight walking, especially in elderly individuals. The purpose of this study was to examine the timing and sequence of segments reorientation in healthy older adults during 90 degrees on-the-spot turns. The role of vision on segments coordination was also examined by testing the participants in eyes-open and eyes-closed conditions. When turning on-the-spot, healthy elderly reoriented their head, shoulder and pelvis simultaneously, followed by foot displacement. This was a robust behavior not affected by visual condition. Axial segments turned slower and more synchronously when vision was not available. While all segments started to turn together in both visual conditions, head turned faster and reached its peak velocity earlier than shoulder and pelvis. However, the difference in segmental velocity and the time to reach the peak velocity was smaller in eyes-closed than eyes-open condition. Without vision, the functional importance of a faster head turn is diminished. Participants may have adopted a tighter control of segments to simplify the control of movement by reducing the degrees of freedom.
机译：在日常活动中经常发生转向。尽管在日常生活中普遍存在转弯及其给老年人带来的挑战，但对于站立和笔直行走的控制，尤其是在老年人中，多段控制转弯的控制知之甚少。这项研究的目的是在90度现场转弯时检查健康老年人中节段重新定向的时间和顺序。还通过在睁眼和闭眼条件下测试参与者来检查视觉对节段协调的作用。健康的老年人在现场转身时会同时调整头，肩和骨盆的方向，然后进行脚置换。这是一种健壮的行为，不受视觉条件的影响。当无法获得视力时，轴节变得更慢且更同步。当所有部分在两种视觉条件下开始一起旋转时，头部的旋转速度更快，并且比肩部和骨盆更早达到峰值速度。但是，闭眼时的节速和达到峰值速度的时间之差比睁眼时小。没有视力，快速转头的功能重要性就会降低。参与者可能已采用更严格的分段控制，以通过降低自由度来简化运动控制。

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