Study on stumble risk assessment from the motion data of the elderly
Falls is one of the serious problems in the hyper-aged society. The relationship between fall risk and depth perception has been pointed out, however, not so many motion analysis from this point of view has conducted. In this paper, we focus on stumbles. To clarify how depth perception related with stumbles, we set a hypothesis that people who have a higher risk to stumble show a different specificity of motion when they approach an object on their pathway due to the alteration of their depth perception and/or their motion planning abilities. We set a motion of approaching a ball as the higher risk motion for stumbles and analyzed it. Five young participants and 14 elderly participants were measured. It is found that 12 elderly people put their support legs in further distance from the ball compared with young participants. Five out of these 12 participants the toe off position of their swing legs were also further than young participants. We analyzed these five participants more precisely and found that they seemed to perceive the ball position closer than as it is. We concluded this phenomenon is occurred due to their alterations of depth perception.
KeywordsBiomechanical analysis Falls Stumble Elderly people
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This work was supported by JSPS KAKENHI Grant-in-Aid for challenging Exploratory Research (Grant Number 17H06291) and for JSPS Fellows (18J10752).
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