A study of development of three-dimensional visual barrier-free device for individual locomotion with visual perceptual disorders

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Unilateral spatial neglect(USN) is a common syndrome in which a patient fails to report or respond to stimulation from the side of space opposite a brain lesion, where these symptoms are not due to primary sensory or motor deficits. Neglect is associated with lower performance on measures of impairment, as well as on measures of disability in activities of daily living(ADL). In this study, we developed a three-dimensional visual barrier-free device that assists dynamic movements, such as walking and wheelchair operation, in individuals with visual perceptual disorder. The aims of this study were to investigate whether a visual information system with a head mounted display(HMD) is useful to patients with USN. To use the HMD as a reminder system during walking and wheelchair ambulation, we also developed a prototype HMD supporting device that can be used for both walking and wheelchair operation. The results indicated that, because of the visual presentation and audio stimuli, the system could reduce the reaction time of patients to correct their posture.