hyperflexion

1.The inferior piriform recess in hyperflexion erect position mostly located at the level of lower 1/3 of C5 and C6 (71.1%);

直立低头位梨状隐窝极71.1%位于C51/3C6平；

2.Method:31 cases of cervical disc herniation(CDH) scanned in neutral position under MRI were taken in hyperflexion and hyperextension.

方法:对31中立位MRI扫描发现颈椎盘突出者,行过屈、过伸位扫描。