Chou Ying-Hui, Wagenaar Robert C, Saltzman Elliot, Giphart J Erik, Young Daniel, Davidsdottir Rosa, Cronin-Golomb Alice
Department of Physical Therapy and Athletic Training, Boston University, Massachusetts, USA.
J Gerontol B Psychol Sci Soc Sci. 2009 Mar;64(2):222-31. doi: 10.1093/geronb/gbp003. Epub 2009 Mar 10.
The purpose of the study is to investigate whether there are age-related differences in locomotion due to changes in presence of vision, optic flow speed, and lateral flow asymmetry using virtual reality technology. Gait kinematics and heading direction were measured using a three-dimensional motion analysis system. Although older and younger adults were affected differentially by the availability of vision, a greater dependence on optic flow information in older adults during walking was not found. Linear relations were observed between walking performance and flow speed as well as heading direction and flow asymmetry. The findings suggest that the ability to integrate optic flow information into the multimodal system for assessment of walking speed and heading direction is comparable in older and younger adults.
本研究的目的是利用虚拟现实技术，调查由于视觉的存在、光流速度和侧向流不对称性的变化，在运动方面是否存在与年龄相关的差异。使用三维运动分析系统测量步态运动学和前进方向。尽管老年人和年轻人受视觉可用性的影响不同，但未发现老年人在行走过程中对光流信息有更大的依赖性。观察到行走性能与流速度以及前进方向与流不对称性之间存在线性关系。研究结果表明，在将光流信息整合到用于评估步行速度和前进方向的多模态系统方面，老年人和年轻人的能力相当。
