This study investigated changes in gait symmetry with trunk displacement during phase-shifted auditory paced treadmill walking for effective training with auditory cueing provided in conventional gait training. Eighteen able-bodied participants walked at a comfortable speed on a treadmill and the measured cadence was set at 100% (baseline). The phase-shifted auditory cue was set to both phase advance and delay of 20% at 5% intervals based on the baseline with respect to matching foot contact to the auditory cue. Trunk displacement increased with the phase-shifted auditory cue, and the largest value was found in the 120% condition compared to baseline ([Formula: see text]). Step length, step time, and swing phase time symmetry ratio gradually increased with increasing phase delay and gradually decreased with increasing phase advance on the linear model. However, single support time and stance phase time symmetry ratio showed contrasting characteristics compared to above parameters. The results indicate that the phase-shifted auditory cue significantly changes gait symmetry and trunk displacement. Particularly, the 20% phase advance and delay cues yielded about a 5% change in the step length symmetry ratio. These results could be used to induce a symmetric gait pattern when an asymmetric gait appears in hemiplegia.

中文翻译：

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跑步机行走过程中相移听觉提示对步态对称性和躯干位移的影响

本研究调查了在相移听觉步态跑步机行走过程中步态对称性与躯干位移的变化，以通过常规步态训练中提供的听觉提示进行有效训练。十八名身体健全的参与者在跑步机上以舒适的速度行走，测量的节奏设置为 100%（基线）。相移的听觉线索被设置为相位提前和延迟 20%，基于基线，以将脚接触与听觉线索相匹配。躯干位移随着相移听觉提示的增加而增加，与基线相比，在 120% 的条件下发现最大值（[公式：见文本]）。步长，步长，在线性模型上，摆相时间对称比随着相位延迟的增加而逐渐增加，随着相位提前的增加而逐渐减小。然而，与上述参数相比，单支撑时间和站立相时间对称比显示出对比特征。结果表明，相移的听觉线索显着改变了步态对称性和躯干位移。特别是，20% 的相位提前和延迟提示在步长对称比中产生了大约 5% 的变化。当偏瘫患者出现不对称步态时，这些结果可用于诱导对称步态模式。结果表明，相移的听觉线索显着改变了步态对称性和躯干位移。特别是，20% 的相位提前和延迟提示在步长对称比中产生了大约 5% 的变化。当偏瘫患者出现不对称步态时，这些结果可用于诱导对称步态模式。结果表明，相移的听觉线索显着改变了步态对称性和躯干位移。特别是，20% 的相位提前和延迟提示在步长对称比中产生了大约 5% 的变化。当偏瘫患者出现不对称步态时，这些结果可用于诱导对称步态模式。