Compression can also be caused by spinal stenosis which is the narrowing of the vertebral foramen in the lumbar vertebrae.

另外，管狭窄也可引起；管狭窄，顾名思义，指的是腰脊髓腔的狭窄。

From top to bottom, the first seven bones are the cervical vertebrae, the next twelve are the thoracic vertebra and the next five, are the lumbar vertebrae.

从上至下数，7块，胸12块，腰5块。

Each cervical, thoracic, and lumbar vertebra is separated by an intervertebral disc, which allows for a slight movement of the vertebrae, and act as a shock absorber.

每块、胸、腰之间都有一个间盘，骨轻微移动，并起到减震的作用。

The spinal cord is connected to the brain and travels through the spinal canal to the second lumbar vertebra, where it ends in a cone, called conus medullaris.

脊髓向上连通大脑，在脊髓腔内一直延伸到第二腰，终止于此形成圆锥样结构，称为脊髓圆锥。