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J Gerontol B Psychol Sci Soc Sci. 2009 Mar;64(2):222-31. doi: 10.1093/geronb/gbp003. Epub 2009 Mar 10.

Effects of optic flow speed and lateral flow asymmetry on locomotion in younger and older adults: a virtual reality study.

Author information

  • 1Department of Physical Therapy and Athletic Training, Boston University, Massachusetts, USA. yinghuichou@gmail.com

Abstract

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.

PMID:
19276239
[PubMed - indexed for MEDLINE]
PMCID:
PMC2655160
Free PMC Article

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