Vibrotactile Tilt Feedback Improves Dynamic Gait Index: a Fall Risk Indicator in Older Adults

摘要

The purpose of this study was to determine the effectiveness of vibrotactile feedback of body tilt in improving dynamic gait index a fall risk indicator in community dwelling older adults. Twelve healthy elderly subjects (3 males and 9 females, age 79.7 ± 5.4 yrs) were tested in an institutional balance rehabilitation laboratory to investigate changes between the feedback off and on conditions. Subjects were acutely exposed to a vibrotactile display that indicated the magnitude and direction of their body tilt from the vertical. Dynamic gait index (DGI) and mediolateral sway were determined during locomotion with, and without, vibrotactile tilt feedbackAll subjects were at risk for falls based on their initial DGI Score (range: 15-19, mean 17.4 ± 1.56), which was taken with the vibratory stimulus turned off. Subjects learned to use the trunk tilt information from the vibrotactile feedback vest through 20-30 minutes of gait and balance training consisting of activities that challenged their balance. Subjects were then retested on the DGI. Statistically significant changes were demonstrated for the DGI total score while using the vibrotactile tilt feedback. DGI total scores improved from 17.1±0.4 to 20.8±0.3 (p< 0.05). We conclude that vibrotactile tilt feedback improves both control of mediolateral sway during gait and Dynamic Gait Index Both are fall risk indicators for this population.