A mechanical device was put at S1 centrum and 5-0 silk thread was ligated with filum terminale and this mechanical device.We can drag the filum terminale from revolving the mechanical device.

• 本实验在成年家猫骶1椎体安置自行设计的机械装置，用丝线和终丝相连，通过旋转装置牵拉丝线，制作终丝慢性牵拉损伤模型，对终丝进行长期慢性动态牵拉。