第二部分：（1）采用前路颈5椎体置入钛螺钉，CSEP监测下逐渐拧入钛钉法建立颈段脊髓慢性压迫模型。
The second part : ( 1 ) Experimental model was established by anterior approach implanting one titanium screw through C5 to compress the cervical spinal cord gradually , under the monitoring of CSEP .
拧法