The central cavity between the body and the arch is called the vertebral foramen.

体与弓之间中央空腔称为孔。

Each vertebra is made of a large anterior portion called the body, and the posterior part called the vertebral arch.

每块骨都由两分组成：前面宽分叫做体，后面突出分叫做弓。

This constitutes a defect or absence of the vertebral arches, due to failure of mesoderm to organize over the region of the defect, and it may or may not involve the underlying meninges and neural tissue.

导致了弓畸形或缺，由于中胚层不能在缺陷区域处生长；弓缺可能影响其下脑脊膜和神经组织。

That stresses a bone called the pars bone, and gymnasts, for example, get a very typical fracture pattern called a spondylolisthesis, which is a fracture of that bone, and then the spine shifts a little bit at that joint.

会对一块名为弓根骨头造成压力，例如，体操运动员常会出现一种非常典型骨折模式， 称为脊滑脱症，即该骨头骨折， 随后脊柱在该关节处略微移位。