Dickstein Ruth, Ufaz Shira, Dunsky Ayelet, Nadeau Sylvie, Abulaffio Nir
Department of Physical Therapy, Faculty of Social Welfare and Health Sciences, University of Haifa, Mount Carmel, Haifa, Israel.
Am J Phys Med Rehabil. 2005 May;84(5):330-7. doi: 10.1097/01.phm.0000159980.14702.be.
In subjects with unilateral vestibular malfunction, running is associated with less departure from the straight-ahead path than walking. The purpose of this study was to broaden the scope of these observations by investigating whether they can be generalized to healthy subjects.
Healthy blindfolded subjects were asked to traverse a 10-m straight path while walking at a self-selected slow speed, walking at a fast speed, or running. Gait speed and mediolateral feet placement were monitored, and departure from the straight-ahead path (path integration) was determined.
In healthy subjects, similar to subjects receiving unbalanced vestibular information, departures from the straight-ahead trajectory (namely, path integration) were larger in slow walking than in running.
In healthy subjects, variation in foot placement between the acts of walking and running seem to account for the enhanced path integration found during running. Perhaps consideration of these findings is also relevant for the interpretation of speed-dependent path integration in subjects receiving abnormal unilateral vestibular inputs.
在单侧前庭功能障碍的受试者中，跑步时偏离直线轨迹的程度比行走时小。本研究的目的是通过调查这些观察结果是否能推广到健康受试者来拓宽其范围。
让健康的蒙眼受试者以自我选择的慢速行走、快速行走或跑步的方式穿越一条10米长的直线路径。监测步态速度和双脚的内外侧位置，并确定偏离直线轨迹（路径整合）的情况。
在健康受试者中，与接受不平衡前庭信息的受试者类似，慢速行走时偏离直线轨迹（即路径整合）的程度大于跑步时。
在健康受试者中，行走和跑步动作之间脚部位置的变化似乎是跑步时路径整合增强的原因。也许考虑这些发现对于解释接受异常单侧前庭输入的受试者中与速度相关的路径整合也有意义。
