A study of virtual reality for improving of left unilateral spatial neglect by Head Mounted Display system.

我们的研究的目的是调查的头戴式显示器（HMD）系统连接到一台计算机，以改善忽视症状的虚拟现实的临床应用的效果。宽视角HMD系统用于视觉显示，以产生缩小或扩展的图像。A3电荷耦合器件（CCD）摄像机记录了一个对象或视图，然后将视觉数据存储到计算机中。计算机把可视数据转换成缩小或放大的图像。最后，在HMD系统的左右镜头上显示缩小或扩展的图像。HMD系统在实验中使用了真实的图片的70%、80%、90%和100%的缩小率。本研究选择了6例右脑损伤患者（平均年龄67.7岁），均患有左半脑空间忽视。我们使用了一个线取消任务，这是评估半侧空间忽略的经典测试之一。所有受试者先在不戴头盔的情况下进行测试，然后在戴头盔的情况下进行测试，测试在四种条件下进行：70%（70 VR+）、80%（80 VR+）、90%（90 VR+）的减少视觉显示和真实的图像（没有减少视觉显示;结果显示，所有患者的改善率均低于70%（70 VR+），80%（8 VR+），以及使用HMD的90 VR+条件与不使用HMD的条件（VR-）相比。90 VR+与VR-、90 R+与70 VR+之间有显著性差异。这些结果表明，HMD系统可能会有一个重要的作用，在单侧空间忽略的神经心理康复。

The aim of our study was to investigate the effect of a head mounted display (HMD) system connected to a computer for improving neglect symptoms as a clinical application of virtual reality. The wide view HMD system was used for a visual display in order to produce a reduced or extended picture. A3 Charge-Coupled device (CCD) camera recorded an object or a view and then visual data was stored into a computer. The computer changed the visual data into a reduced or an extended picture. Finally, the reduced or extended pictures were displayed on the right and left lenses in the HMD system. The HMD system used the reduction rates of 70, 80, 90, and 100 percent of a real picture in the experiment. Six right brain-damaged patients (mean age 67.7 years) who have left hemispatial neglect were selected for this study. We used a line cancellation task that was one of the classic tests for assessing hemispatial neglect. All subjects performed the test first without and then with the HMD.The test trials were carried out under 4 conditions : 70% (70VR+), 80% (80VR+), 90% (90VR+) of reduced visual display and the real image (no reduced visual display ; VR-).The results showed that all patients improved under 70% (70VR+), 80%(8VR+), and the 90VR+ conditions with use of the HMD as compared to the condition without HMD (VR-). There were significant differences between 90VR+ condition and the VR- condition, and between 90R+ condition and the 70VR+ condition. These results suggest that the HMD system may come to have an important role in the neuropsychological rehabilitation of unilateral spatial neglect.