Conventionally, the adaptive body area for prism adaptation (PA) has been limited to the visible area of prism glasses, especially the unilateral upper limbs. In this study, we developed a virtual reality system that extends PA's adaptive body area. This system sets the visible area of the target and introduces a symbolic representation of the body position to realize a head position adaptation task. As a result, the develped system generates PA not to individual body parts but to a collection of multiple motor units. Furthermore, experimental results in healthy subjects showed that the head position adaptation task could generate PA in the upper trunk system (The upper trunk system is defined as a system consisting of the upper trunk, head, and upper extremities) and displace it to the left anteriorly. Therefore, the head position adaptation task is expected to be effective for the postural correction of USN patients with upper trunk system tilt to the right posteriorly. Moreover, the developed system has potential applications in a wide range of fields, such as detecting cerebellar disorders.

中文翻译：

---

开发虚拟现实系统，为多个运动单元生成棱镜适应

传统上，棱镜适应（PA）的适应身体区域仅限于棱镜眼镜的可见区域，特别是单侧上肢。在这项研究中，我们开发了一个虚拟现实系统，可以扩展 PA 的自适应身体区域。该系统设置目标的可见区域并引入身体位置的符号表示来实现头部位置适应任务。因此，所开发的系统不是针对单个身体部位而是针对多个运动单元的集合生成 PA。此外，在健康受试者中的实验结果表明，头部位置适应任务可以在上躯干系统（上躯干系统定义为由上躯干、头部和上肢组成的系统）中产生PA并将其向左移动前面。因此，头部位置适应任务有望对上躯干系统向右后倾斜的 USN 患者的姿势矫正有效。此外，所开发的系统在广泛领域具有潜在应用，例如检测小脑疾病。