Study of action control using vector analysis of surrounding space

利用周围空间矢量分析的动作控制研究

基本信息

批准号：
11671682
负责人：
TAKAHASHI Masahiro
金额：
$ 2.3万
依托单位：
Tokai University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

Tilting of the head during rotation produces strange sensation, body sways and nystagmus when examined in the dark. However, these phenomena are not evoked in the dark. The difference may be simply explained supposing a vector of surrounding outer world in the brain. The present study was done to answer following questions : a) whether the difference between vision and non-vision conditions hold good at fast rotations; b) how far adaptation proceeds by repetitive stimuli; c) whether training effects are different between vision and non-vision conditions; d) whether adaptation against Coriolis stimulation fits the hypothesis of vector analysis. In 1999, we modified a computer-controlled rotating chair into a rotating platform. In 2000, we investigated success rates of stance during Coriolis stimulation at different speeds. Although success rates differed between vision and non-vision conditions at 50 deg/s, they did not differ at 70 deg/s and faster speeds. In 2001, we studied training effects with (N=10) and without vision (N=10) on rotating velocities for successful stance and nature of acquired standing abilities. After daily 20-min-long training with Coriolis stimulation, more than half of the subjects could stand at 200 deg/s irrespective of visual condition. Reversed rotation after training degraded stance similarly as before training. In contrast, stance against lateral tilting was almost equal to forward tilting after training. We summarize the present study as follows, a) stance became quickly adapted itself to Coriolis stimulation; b) maximum rotation speed far exceeds 200 deg/s; c) vision does not influence training effect; d) adaptation of spatial orientation to Coriolis stimulation may be explained by a transfer of reference frame from stationary space to rotating space.

在旋转过程中，头部倾斜会产生奇怪的感觉，身体在黑暗中检查时摇摆和眼球震颤。但是，这些现象并未在黑暗中引起。可以简单地解释差异，假设大脑周围外世界的矢量。本研究是为了回答以下问题：a）视力和非视觉条件之间的差异在快速旋转方面是否良好； b）通过重复刺激进行适应性的程度； c）视力和非视觉条件之间的训练效果是否不同； d）针对科里奥利刺激的适应是否适合向量分析的假设。在1999年，我们将计算机控制的旋转椅子修改为旋转平台。在2000年，我们调查了在不同速度下刺激科里奥利刺激过程中的成功率。尽管在50度/s的视力和非视觉条件之间的成功率有所不同，但在70度/s和更快的速度下它们没有差异。在2001年，我们研究了（n = 10），没有视力（n = 10）对旋转速度的旋转速度，以获得成功的立场和性质的性质。在每天进行20分钟的Coriolis刺激训练之后，无论视觉状况如何，超过一半的受试者都可能处于200 deg/s的状态。训练后逆转旋转降级，就像训练之前一样。相比之下，训练后，针对侧向倾斜的立场几乎等于向前倾斜。我们总结了本研究，如下所示，a）立场迅速适应了科里奥利刺激； b）最大旋转速度远远超过200度/s； c）视力不会影响训练效果； d）可以通过从固定空间到旋转空间的参考框架转移来解释将空间取向对科里奥利刺激的适应。