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目的 探讨胸廓上口倾斜度的年龄变化及其与呼吸功能的相互关系。方法 对２００名大学生和１００ 名小学生的胸骨颈静脉切迹的高度和肺活量进行测定。结果 男女大学生分别与小学生比较， 胸骨颈静脉切迹与第７ 颈椎棘突的连线（ＪＣ）和颈静脉切迹的水平线（ＪＬ）在胸后壁的垂直距离存在着非常显著性差异。ＪＣ和ＪＬ在胸后壁的垂直距离与肺活量的关系方面，男女大学生和小学生分别有着密切的正相关关系。结论 随着身体的发育，胸骨上缘高度逐渐下降，胸骨上缘越低，肺活量越大
Objective To investigate the age variation of the thoracic spine and its relationship with respiratory function. Methods The height and vital capacity of the thoracic jugular vein of 200 college students and 100 primary school students were measured. Results Male and female undergraduates had significant differences in the vertical distance of the posterior wall of thoracic wall between male and female undergraduates, respectively. JC and JL in the relationship between the vertical distance chest wall and vital capacity, male and female college students and pupils have a close positive correlation. Conclusion With the development of the body, the height of the upper edge of the sternum gradually decreases, and the lower the upper edge of the sternum, the greater the vital capacity