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Measurement of the visual contribution to postural steadiness from the COP movement: methodology and reliability.

机译：COP运动对姿势稳定的视觉影响的测量：方法和可靠性。

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We studied the reliability of different measures of the visual contribution to postural steadiness by recording the postural sway during standing with eyes open (EO) or eyes closed (EC). The COP trajectory was recorded in 21 subjects aged 42-61 standing on a firm or foam support. The improvement of postural steadiness due to vision was measured with a higher reliability (i.e. lower intra- and inter-subject variabilities) with the sway velocity V, than with the position RMS. Due to the increase of the variability of V and RMS with their own mean values, we quantified the visual contribution to posture by the stabilization ratio (SR), based on a logarithm transform of V or RMS. As compared to the Romberg quotient (EC/EO), SR improved the reliability of the measurement of the visual contribution to posture within individuals, across subjects, and even across different studies in the literature. Our method led to decrease the inter-subject coefficient of variation of this measurement to about 25%, using a foam support. It leads to a similar accuracy in binocular and monocular vision, and it also applies to the quantification of other non-visual sensory contributions to posture.
机译：通过记录睁眼（EO）或闭眼（EC）站立时的姿势摇摆，我们研究了视觉测量对姿势稳定性的不同测量方法的可靠性。 COP轨迹记录在21位年龄在42-61岁的站立或稳固支撑物上的受试者中。相对于位置RMS，摆速V可以更高的可靠性（即，受试者内部和受试者之间的差异性更低）来衡量由于视觉导致的姿势稳定性的改善。由于V和RMS各自平均值的可变性增加，我们基于V或RMS的对数变换，通过稳定比（SR）量化了视觉对姿势的贡献。与Romberg商（EC / EO）相比，SR提高了个体，跨学科乃至不同文献研究中对姿势的视觉贡献测量的可靠性。我们的方法导致使用泡沫载体将受试者之间的变异系数降低到约25％。它导致双目和单眼视觉的准确性相似，并且还适用于量化其他非视觉感官对姿势的贡献。

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