用静态姿势描记法1型（SPGI）来研究头后屈对直立平衡的影响。试验是通过比较在稳定平台（SI）上和在泡沫橡胶平台（f。）上，头后屈与正常头位的测试结果，评价SPG描记中头后屈的影响，并了解视觉一前庭一本体感受器之间的相互作用。试验对象包括；25名正常年轻人作为对照组； The static posture type 1 (SPGI) was used to study the effect of posterior head flexion on the upright balance. The trial evaluates the effect of head-back flexion on SPG tracings by comparing test results of head-back flexion with normal head position on a stabilized platform (SI) and on a foam rubber platform (f.), And to understand the relationship between the visual-atrium- The interaction between receptors. Subjects included; 25 normal young people as a control group;