Bredin Jonathan, Kerlirzin Yves, Israël Isabelle
Laboratoire Action Mouvement Adaptation UPRES JE 2378, UFR STAPS Université, René Descartes, 1 rue Lacretelle, 75015 Paris, France.
Exp Brain Res. 2005 Dec;167(4):670-4. doi: 10.1007/s00221-005-0251-3. Epub 2005 Nov 15.
The ability to estimate distance walked when blindfolded is associated with the vestibular, proprioceptive and (loco-)motor systems. In this study, we examined subjects' ability to walk when blindfolded to a previously seen target. We examined whether there is a difference of performance in path integration between athletes and non-athletes. Two groups of healthy volunteers took part in this experiment: 21 athletes and 20 non-athletes. Subjects were asked to walk at three different velocities (slow, normal, fast) to a target (10 m in front of them) that they had seen before being blindfolded. Increase in velocity was associated with a decrease in the distance walked for both groups. Both groups were accurate at normal velocities. Athletes were also accurate at fast velocities whereas non-athletes undershot the target. In both groups, accuracy considerably decreased at slow velocities. It seems that our perceptual system can adapt to different velocities (normal, fast) but is most strongly disrupted at low velocity. When attempting to modify walking velocity, step length is also modified, playing a determining role in the estimation of distance.
被蒙住眼睛时估计行走距离的能力与前庭、本体感觉和（运动）运动系统有关。在本研究中，我们检查了受试者被蒙住眼睛走向先前看到的目标时的行走能力。我们研究了运动员和非运动员在路径整合方面的表现是否存在差异。两组健康志愿者参与了本实验：21名运动员和20名非运动员。受试者被要求以三种不同速度（慢、正常、快）走向一个他们在被蒙住眼睛之前看到的目标（在他们前方10米处）。速度增加与两组行走的距离减少有关。两组在正常速度下都很准确。运动员在快速行走时也很准确，而非运动员则未达到目标。在两组中，慢速行走时准确性显著下降。似乎我们的感知系统可以适应不同速度（正常、快速），但在低速时受到的干扰最大。当试图改变行走速度时，步长也会改变，在距离估计中起决定性作用。
