title: Effects of optic flow speed and lateral flow asymmetry on locomotion in younger and older adults: a virtual reality study.
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.
authors.affiliation: Department of Physical Therapy and Athletic Training, Boston University, Massachusetts, USA. yinghuichou@gmail.com
authors.forename: Ying-Hui
authors.initials: YH
authors.lastname: Chou
authors.forename: Robert C
authors.initials: RC
authors.lastname: Wagenaar
authors.forename: Elliot
authors.initials: E
authors.lastname: Saltzman
authors.forename: J Erik
authors.initials: JE
authors.lastname: Giphart
authors.forename: Daniel
authors.initials: D
authors.lastname: Young
authors.forename: Rosa
authors.initials: R
authors.lastname: Davidsdottir
authors.forename: Alice
authors.initials: A
authors.lastname: Cronin-Golomb
mesh_terms: D000054:Acceleration; D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000523:psychology*; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D007699:Kinesthesis; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D009039:Motion Perception; D009949:Orientation; D011597:Psychomotor Performance; D014584:User-Computer Interface; D015357:Vision Disparity; D014796:Visual Perception; D016138:Walking; D055815:Young Adult