后正中线

X⑦.定位点到后正中线的距离；

The distance from the location to the posterior median line , X ⑧ .

左听三诊的上角位置较高，它的上角、内侧角距后正中线的距离较近。

The left triangle of auscultation was at a higher position than the right one , and the upper and medial angles were closer to the posterior median line .

结果表明：家兔背部距后正中线旁开1.5cm、3.0cm各点声波毫幅值明显高于其它检测点（P＜0.01）。

Statistical result showed that there were high-sonic conduct points on the back of the rabbit ( P < 0 . 01 ) .

手术时局麻，后正中线旁8～10cm处进针，进针方向与躯干矢状面成45°角，透视下确认位置。

Under local anesthesia , the instruments were inserted at a 45 degrees angle sagital to the trunk , and the entry point was located 8 to 10 cm from the midline .

结果：外侧支在深筋膜的浅出点集中于肩胛下角至骶髂关节连线的附近，其与后正中线距离的均数在5cm以上。

Results : The apertures of postero lateral branch of the lumbar nerve in fascia were situated around a line between the inferior angle of the scapula and the ipsilateral sacroiliac joint . The distance between the apertures and spinous processes was a little longer than 5 cm .

手术切口位于后正中线，以受侵袭的节段为中心。

A posterior midline incision is made , centered on the affected level .

结果寰椎横突和枕下三角是暴露寰椎横突孔至硬膜入口段椎动脉的重要解剖标志。椎动脉硬膜入口处至后正中线平均距离约167mm。

Results Transversarium of Cl and inferior occipital triangle are important marks to expose vertebral artery between the foramen transversarium of Cl to the entry to dura .

重建后测量400个椎弓根的入点坐标（x，y），即椎弓根轴线在椎骨后表面的投影点与后正中线的距离（x）及与横突中线的垂直距离（y）。

After images were reconstructed , the coordinates including the distance from the projection point of the lumbar pedicle axis to the midline of back ( x ) and to the midline of transverse process ( y ) were measured .