首页> 外文会议>Annual Meeting of the Human Factors and Ergonomics Society(HFES 2007); 20071001-05; Baltimore,MA(US) >IDENTIFICATION OF AGING EFFECTS ON THE CONTROL OF UPRIGHT STANCE USING A LOCAL MAXIMUM WAVELET TRANSFORM METHOD
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IDENTIFICATION OF AGING EFFECTS ON THE CONTROL OF UPRIGHT STANCE USING A LOCAL MAXIMUM WAVELET TRANSFORM METHOD

机译:局部最大小波变换法识别竖立姿态控制中的老化效应

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The purpose of this study was to investigate aging effects on the mechanisms of postural control during upright stance, and specifically the use of proprioceptive feedback on this control. Thirty-two healthy individuals participated, equally divided among younger (19-22 years) and older groups (54-68 years) and genders. Experimental trials involved several sessions of quiet stance on a firm surface with eyes closed. Center of pressure (COP) data were obtained from a force platform and processed using a new local maximum wavelet transform method. The critical time interval (CTI) derived from this method was proposed to describe the activation period of proprioceptive function, which is mainly influenced by the proprioceptive feedback loop. A reduced CTI was assumed to indicate poorer control based on proprioceptive input. Results showed that younger participants' CTI significantly increased from the first experimental session to consecutive experimental sessions in both the mediolateral (ML) and anteroposteriorer (AP) directions. However, older participates' CTI did not exhibit significant differences between the first and the consequent experimental sessions in either direction. This result suggests that the adaptability of proprioceptive function was impaired with age. Younger adults' CTIs were significantly larger than those of older adults in both ML and AP directions, indicating that among older adults stance control based on proprioceptive function was significantly impaired due to aging.
机译:这项研究的目的是调查在直立姿势期间衰老对姿势控制机制的影响,特别是在这种控制中使用本体感受反馈。 32名健康个体参加,平均分为年轻组(19-22岁)和老年组(54-68岁)和性别。实验性试验涉及在闭着眼睛的牢固表面上进行几次安静的姿势。从力平台获得压力中心(COP)数据,并使用新的局部最大小波变换方法进行处理。提出了从该方法导出的临界时间间隔(CTI)来描述本体感受功能的激活周期,该周期主要受本体感受反馈回路的影响。假定CTI降低表示基于本体感受输入的控制较差。结果显示,年轻参与者的CTI从第一实验阶段到连续实验阶段均沿内侧(ML)和前后(AP)方向显着增加。但是,较老的参与者的CTI在任何一个方向上的第一次实验和随后的实验之间都没有表现出显着差异。该结果表明,随着年龄的增长,本体感受功能的适应性受到损害。在ML和AP方向上,年轻人的CTI均明显大于老年人,这表明,在老年人中,基于本体感受功能的姿势控制因衰老而明显受损。

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