Virtual reality (VR) offers many opportunities for post-stroke rehabilitation. However, "VR" can refer to several types of computer-based rehabilitation systems. Since these systems may impact the feasibility and the efficacy of VR interventions, consistent terminology is important. In this study, we aimed to optimize the terminology for VR-based post-stroke rehabilitation by assessing whether and how review papers on this topic defined VR and what types of mixed reality systems were discussed. In addition, this review can inspire the use of consistent terminology for other researchers working with VR. We assessed the use of the term VR in review papers on post-stroke rehabilitation extracted from Scopus, Web of Science and PubMed. We also developed a taxonomy distinguishing 16 mixed reality systems based on three factors: immersive versus semi-immersive displays, the way in which real and virtual information is mixed, and the main input device. 64% of the included review papers (N = 121) explicitly defined VR and 33% of them described different subtypes of VR, with immersive and non-immersive VR as the most common distinction. The most frequently discussed input devices were motion-capture cameras and handheld devices, while regular 2D monitors were the most frequently mentioned output devices. Our analysis revealed that reviews on post-stroke VR rehabilitation did not or only broadly defined "VR" and did not focus on a specific system. Since the efficacy and feasibility of rehabilitation may depend on the specific system, we propose a new data-driven taxonomy to distinguish different systems, which is expected to facilitate communication amongst researchers and clinicians working with virtual reality.

中文翻译：

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虚拟现实一词在中风后康复中的使用：范围界定审查和评论。

虚拟现实（VR）为中风后康复提供了许多机会。然而，“VR”可以指几种类型的基于计算机的康复系统。由于这些系统可能会影响 VR 干预措施的可行性和有效性，因此一致的术语非常重要。在这项研究中，我们旨在通过评估有关该主题的评论论文是否以及如何定义 VR 以及讨论了哪些类型的混合现实系统，来优化基于 VR 的中风后康复的术语。此外，这篇评论可以启发其他研究 VR 的研究人员使用一致的术语。我们评估了从 Scopus、Web of Science 和 PubMed 中提取的中风后康复评论论文中 VR 一词的使用情况。我们还开发了一种分类法，根据三个因素区分 16 种混合现实系统：沉浸式显示器与半沉浸式显示器、真实和虚拟信息混合的方式以及主要输入设备。64% 的纳入评论论文 (N = 121) 明确定义了 VR，其中 33% 描述了 VR 的不同子类型，其中沉浸式和非沉浸式 VR 是最常见的区别。最常讨论的输入设备是动作捕捉相机和手持设备，而常规 2D 监视器是最常提到的输出设备。我们的分析显示，对中风后 VR 康复的评论没有或只是广义地定义了“VR”，并且没有关注特定的系统。由于康复的功效和可行性可能取决于特定的系统，因此我们提出了一种新的数据驱动的分类法来区分不同的系统，这有望促进使用虚拟现实的研究人员和临床医生之间的沟通。