根据矢状面上脊柱平衡的理念，颈椎和腰椎的前凸，胸椎和骶椎的后凸构成的交替曲线使头能够定位与躯体和骨盆的上方。

According to the concept of sagittal spinal balance, the alternating curves of cervical and lumbar lordosis and thoracic and sacral kyphosis enable the head to be positioned over the trunk and pelvis.

youdao

在术前、后全脊柱侧位片测量腰椎总前凸、胸椎总后凸、骶骨倾斜度和颈7铅垂线。

Total lumbar lordosis, thoracic kyphosis, sacral slope, and C7 plumb line were measured on the pre - and postoperative whole spine lateral views.

youdao