Fallers choose an early transfer gaze strategy during obstacle avoidance in dual-task condition
Minoru Yamada1, Hidenori Tanaka2, Shuhei Mori1, Koutatsu Nagai1, Kazuki Uemura1, Buichi Tanaka1, Tomoki Aoyama1 and Noriaki Ichihashi1
1Human Health Sciences, Graduate School of Medicine, Kyoto University, Shogoin, Sakyo-ku, Kyoto, 2Department of Rehabilitation, Higashi Ikoma Hospital, Ikoma-city, Nara, Japan

Abstract

Background and aims: The aim of the present study is to compare the gaze behavior between fallers and non-fallers during obstacle avoidance in dual-task conditions. Methods: Nine older adults who had no experience of falling (mean age 79.9±5.4) and 9 older adults with known experience of falling (83.4±3.6) participated in the study. We examined their gaze behavior during obstacle avoidance in single-task (ST) and dual-task (DT) conditions. Results: In the ST condition, compared with the faller group, the non-faller group showed no significant difference in timing of gaze transfer from the obstacle (faller: gaze transfer from obstacle when 1.6±1.1 steps before; non-faller: 1.9±0.7 steps before, p=0.493). In the DT condition, the faller group chose a transfer of gaze strategy significantly earlier than the non-faller group (faller: 2.7±1.4 steps before; non-faller: 1.6±0.5 steps before, p=0.008). Conclusion: Our findings suggest that fallers chose an early transfer of gaze strategy when challenged with an obstacle in DT conditions. (Aging Clin Exp Res 2011; 23: 316-319) ©2011, Editrice Kurtis

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