Experimental evidences suggested that dorsiflexion movement of spine caused by applied force could lead tension in the anterior border of longitudinal ligament,vertebral body and intervertebral disc.

• 实验表明:力作用造成脊柱背伸,使前纵韧带、椎体和椎间盘的前缘产生张力,可以达到椎体压缩性骨折复位,椎间盘突出还纳及改善脊柱受力条件的作用;