Methods:Observation was performed in the aspect of form anatomy, especially the measurement of included angle of vertebra and inferior facet, action line of sport mechanics and X-ray slice.

• 方法:从形态解剖,特别是椎体与下关节突关节面夹角测量,运动力学观测作用力线和X线片动态观察,结论:枢纽对脊柱运动起带动、制约的调控作用。