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<p>Mixed reality headset monitor display (MR-HMD) is an emerging technology and has been considered for use in healthcare and rehabilitation. We aimed to examine the effects of MR-HMD on balance and postural control during a dynamic movement of the upper limb in a standing posture. Twenty participants performed a unilateral repetitive reaching task with or without MR-HMD in the present study. With MR-HMD, the effects of presence or absence of visual feedback on successful reaching were examined. The velocity and 95% confidence ellipse area of the center of pressure (COP) and the surface electromyography (EMG) of four lower limb muscles were recorded during the task. The assessments of head and eye movements with MR-HMD were used to examine the effects of those on COP changes. As a result, velocity (medial-lateral direction) and ellipse area of COP, and EMG activity of the soleus muscle were significantly smaller with visual feedback in the MR-HMD condition than those without MR or visual feedback. The head and eye movements with MR-HMD were significantly smaller than eye tracking conditions, while the ellipse area of COP was oppositely larger with MR due to the upper limb movements. Our findings suggest that wearing MR-HMD causes better stability compared to physical environment that induce specific postural control depending on the visual feedback of the interactions between individual’s body and the virtual object.</p>

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Standing postural control during an upper limb reaching task in a mixed reality condition: analysis of center of pressure and lower limb muscle activities

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月6日

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  • Yunhe Zhang,
  • Amiri Matsumoto,
  • Chihiro Oshima,
  • Kenta Sakamoto,
  • Takashi Sugiyama,
  • Nan Liang

摘要

Mixed reality headset monitor display (MR-HMD) is an emerging technology and has been considered for use in healthcare and rehabilitation. We aimed to examine the effects of MR-HMD on balance and postural control during a dynamic movement of the upper limb in a standing posture. Twenty participants performed a unilateral repetitive reaching task with or without MR-HMD in the present study. With MR-HMD, the effects of presence or absence of visual feedback on successful reaching were examined. The velocity and 95% confidence ellipse area of the center of pressure (COP) and the surface electromyography (EMG) of four lower limb muscles were recorded during the task. The assessments of head and eye movements with MR-HMD were used to examine the effects of those on COP changes. As a result, velocity (medial-lateral direction) and ellipse area of COP, and EMG activity of the soleus muscle were significantly smaller with visual feedback in the MR-HMD condition than those without MR or visual feedback. The head and eye movements with MR-HMD were significantly smaller than eye tracking conditions, while the ellipse area of COP was oppositely larger with MR due to the upper limb movements. Our findings suggest that wearing MR-HMD causes better stability compared to physical environment that induce specific postural control depending on the visual feedback of the interactions between individual’s body and the virtual object.