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虚拟现实让截肢患者感觉假肢成“真”

新华网 2018-08-16 作者:刘曲

  一项新研究显示,虚拟现实有望帮助截肢患者“感受”到来自假肢的触感,诱导他们的大脑相信假肢就属于他们自己的身体。

  许多截肢患者在使用假肢一段时间后即选择停用,因为他们觉得不适应。一方面,患者感觉失去的肢体似乎仍然存在,也就是存在所谓的幻肢;另一方面,市场上销售的假肢通常不提供触觉反馈,患者需要结合观察才能正确使用。

  为此,瑞士洛桑联邦理工学院等机构研究人员引入虚拟现实技术,巧妙地结合视觉和触觉来提升截肢患者使用假肢的体验,并利用两名失去手的志愿者开展了试验。论文已发表在英国《神经病学、神经外科与精神病学杂志》期刊上。

  具体来说,研究人员通过刺激两名患者的残肢神经,让幻肢的食指指尖产生触觉。两名患者戴有虚拟现实眼镜,在幻肢食指指尖感受到触觉的同时,会“看”到假肢食指发光,从而让大脑“相信”假肢成为身体的自然延伸。

  试验前,两名患者报告称,幻肢的手很小,而且感觉前臂似乎不存在。试验后,两人表示,幻肢已与假肢合为一体,感觉假肢“成为自己身体的一部分”,并且这种感觉在试验结束10分钟后依然存在。

  研究人员表示,试验所用装置是便携式的,有朝一日也许能成为一种疗法,帮助患者永久性地植入假肢。

责任编辑:王超

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