Laboratoire de Physiologie de l'Exercice, EA 4338, Université de Savoie, Le Bourget du Lac, France.
Restor Neurol Neurosci. 2010;28(6):749-59. doi: 10.3233/RNN-2010-0544.
To assess whether insights from postural control without additional visual feedback (VFB) could be gained to explain the possible VFB effects (or non-effects) on upright stance performance.
The center-of-pressure (CP) displacements of 39 patients with a recent hemispheric stroke (93 days ± 56; mean ± s.d.) were analyzed in two conditions (eyes open and VFB) through various classical parameters and fractional Brownian motion (fBm) modeling. Correlations between their ability to use the VFB technique appropriately and parameters assessing the eyes open condition were also computed.
The fBm modeling showed that the VFB technique improves the control of the CP trajectories over the longer time intervals. In both conditions, the patients with right hemiparesis, compared to those with left hemiparesis, demonstrated improved control of their CP displacement along the AP axis over the shortest time intervals. Overall, 28% of the patients did not use the VFB technique. The correlation analysis indicated that the larger the spontaneous CP movements in the eyes open condition, the greater the effect of the VFB technique.
By emphasizing its particular effects and the profile of the patients who used the technique, these data specify the conditions allowing hemiparetic patients to use the VFB technique appropriately and immediately.
评估是否可以从无额外视觉反馈（VFB）的姿势控制中获得见解，以解释 VFB 对直立姿势表现的可能影响（或无影响）。
通过各种经典参数和分数布朗运动（fBm）建模，分析了 39 名近期半球卒中患者（93 天±56；平均值±标准差）在两种条件（睁眼和 VFB）下的中心压力（CP）位移。还计算了他们正确使用 VFB 技术的能力与评估睁眼条件的参数之间的相关性。
fBm 建模表明，VFB 技术改善了 CP 轨迹在较长时间间隔内的控制。在两种条件下，与左侧偏瘫患者相比，右侧偏瘫患者在最短的时间间隔内改善了 CP 沿 AP 轴的位移控制。总体而言，28%的患者未使用 VFB 技术。相关性分析表明，睁眼条件下 CP 自发性运动越大，VFB 技术的效果越大。
通过强调其特殊影响和使用该技术的患者特征，这些数据明确了允许偏瘫患者正确和立即使用 VFB 技术的条件。
